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2,585,429 | It is possible to access bits of MATLAB's internal java code to programmatically change MATLAB itself. For example, you can programmatically open a document in the editor using
```
editorServices = com.mathworks.mlservices.MLEditorServices;
editorServices.newDocument() %older versions of MATLAB seem to use new()
```
You can see the method signatures (but not what they do) using `methodsview`.
```
methodsview(com.mathworks.mlservices.MLEditorServices)
```
I have a few related questions about using these Java methods.
Firstly, is there any documentation on these things (either from the Mathworks or otherwise)?
Secondly, how do you find out what methods are available? The ones I've come across appear to be contained in JAR files in matlabroot\java\jar, but I'm not sure what the best way to inspect a JAR file is.
Thirdly, are there functions for inspecting the classes, other than `methodsview`?
Finally, are there any really useful methods that anyone has found? | 2010/04/06 | [
"https://Stackoverflow.com/questions/2585429",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/134830/"
] | To find out more about java objects, I use [uiinspect](http://www.mathworks.com/matlabcentral/fileexchange/17935-uiinspect-display-methodspropertiescallbacks-of-an-object).
The only place I know that is documenting the Matlab hidden Java stuff is [Undocumented Matlab](http://undocumentedmatlab.com/) by [Yair Altman](https://stackoverflow.com/users/233829/yair-altman). His site lists plenty of very useful tricks. Being able to use Java to format text in list boxes has come in very handy for me, for example.
**EDIT**
[The man](https://stackoverflow.com/questions/2585429/getting-help-on-matlabs-com-mathworks-internals/2587054#2587054) has spoken. Listen to him, since I don't think there's anyone outside MathWorks who knows more about Matlab's internal java code. | [Undocumented Matlab](http://undocumentedmatlab.com/) is a great place to start looking. |
2,585,429 | It is possible to access bits of MATLAB's internal java code to programmatically change MATLAB itself. For example, you can programmatically open a document in the editor using
```
editorServices = com.mathworks.mlservices.MLEditorServices;
editorServices.newDocument() %older versions of MATLAB seem to use new()
```
You can see the method signatures (but not what they do) using `methodsview`.
```
methodsview(com.mathworks.mlservices.MLEditorServices)
```
I have a few related questions about using these Java methods.
Firstly, is there any documentation on these things (either from the Mathworks or otherwise)?
Secondly, how do you find out what methods are available? The ones I've come across appear to be contained in JAR files in matlabroot\java\jar, but I'm not sure what the best way to inspect a JAR file is.
Thirdly, are there functions for inspecting the classes, other than `methodsview`?
Finally, are there any really useful methods that anyone has found? | 2010/04/06 | [
"https://Stackoverflow.com/questions/2585429",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/134830/"
] | There is no official documentation nor support for these classes. Moreover, these classes and internal methods represent internal implementation that may change without notice in any future Matlab release. This said, you can use my [uiinspect](http://www.mathworks.com/matlabcentral/fileexchange/17935-uiinspect-display-methodspropertiescallbacks-of-an-object) and [checkClass](http://www.mathworks.com/matlabcentral/fileexchange/26947-checkclass) utilities to investigate the internal methods, properties and static fields. These utilities use Java reflection to do their job, something which is also done by the built-in ***methodsview*** function (I believe my utilities are far more powerful, though). In this respect, I believe we are not crossing the line of reverse-engineering which may violate Matlab's license.
If you are looking for documentation, then my [UndocumentedMatlab.com](http://UndocumentedMatlab.com) website has plenty of relevant resources, and more is added on a regular basis so keep tuned.
I am also working on a book that will present a very detailed overview of all these internal classes, among other undocumented stuff - I hope to have publication news later this year. | To find out more about java objects, I use [uiinspect](http://www.mathworks.com/matlabcentral/fileexchange/17935-uiinspect-display-methodspropertiescallbacks-of-an-object).
The only place I know that is documenting the Matlab hidden Java stuff is [Undocumented Matlab](http://undocumentedmatlab.com/) by [Yair Altman](https://stackoverflow.com/users/233829/yair-altman). His site lists plenty of very useful tricks. Being able to use Java to format text in list boxes has come in very handy for me, for example.
**EDIT**
[The man](https://stackoverflow.com/questions/2585429/getting-help-on-matlabs-com-mathworks-internals/2587054#2587054) has spoken. Listen to him, since I don't think there's anyone outside MathWorks who knows more about Matlab's internal java code. |
2,585,429 | It is possible to access bits of MATLAB's internal java code to programmatically change MATLAB itself. For example, you can programmatically open a document in the editor using
```
editorServices = com.mathworks.mlservices.MLEditorServices;
editorServices.newDocument() %older versions of MATLAB seem to use new()
```
You can see the method signatures (but not what they do) using `methodsview`.
```
methodsview(com.mathworks.mlservices.MLEditorServices)
```
I have a few related questions about using these Java methods.
Firstly, is there any documentation on these things (either from the Mathworks or otherwise)?
Secondly, how do you find out what methods are available? The ones I've come across appear to be contained in JAR files in matlabroot\java\jar, but I'm not sure what the best way to inspect a JAR file is.
Thirdly, are there functions for inspecting the classes, other than `methodsview`?
Finally, are there any really useful methods that anyone has found? | 2010/04/06 | [
"https://Stackoverflow.com/questions/2585429",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/134830/"
] | I am an eclipse fan. If you use that as your IDE, the jar can be imported into one of your projects and you can inspect the methods in there. | [Undocumented Matlab](http://undocumentedmatlab.com/) is a great place to start looking. |
2,585,429 | It is possible to access bits of MATLAB's internal java code to programmatically change MATLAB itself. For example, you can programmatically open a document in the editor using
```
editorServices = com.mathworks.mlservices.MLEditorServices;
editorServices.newDocument() %older versions of MATLAB seem to use new()
```
You can see the method signatures (but not what they do) using `methodsview`.
```
methodsview(com.mathworks.mlservices.MLEditorServices)
```
I have a few related questions about using these Java methods.
Firstly, is there any documentation on these things (either from the Mathworks or otherwise)?
Secondly, how do you find out what methods are available? The ones I've come across appear to be contained in JAR files in matlabroot\java\jar, but I'm not sure what the best way to inspect a JAR file is.
Thirdly, are there functions for inspecting the classes, other than `methodsview`?
Finally, are there any really useful methods that anyone has found? | 2010/04/06 | [
"https://Stackoverflow.com/questions/2585429",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/134830/"
] | There is no official documentation nor support for these classes. Moreover, these classes and internal methods represent internal implementation that may change without notice in any future Matlab release. This said, you can use my [uiinspect](http://www.mathworks.com/matlabcentral/fileexchange/17935-uiinspect-display-methodspropertiescallbacks-of-an-object) and [checkClass](http://www.mathworks.com/matlabcentral/fileexchange/26947-checkclass) utilities to investigate the internal methods, properties and static fields. These utilities use Java reflection to do their job, something which is also done by the built-in ***methodsview*** function (I believe my utilities are far more powerful, though). In this respect, I believe we are not crossing the line of reverse-engineering which may violate Matlab's license.
If you are looking for documentation, then my [UndocumentedMatlab.com](http://UndocumentedMatlab.com) website has plenty of relevant resources, and more is added on a regular basis so keep tuned.
I am also working on a book that will present a very detailed overview of all these internal classes, among other undocumented stuff - I hope to have publication news later this year. | [Undocumented Matlab](http://undocumentedmatlab.com/) is a great place to start looking. |
2,585,429 | It is possible to access bits of MATLAB's internal java code to programmatically change MATLAB itself. For example, you can programmatically open a document in the editor using
```
editorServices = com.mathworks.mlservices.MLEditorServices;
editorServices.newDocument() %older versions of MATLAB seem to use new()
```
You can see the method signatures (but not what they do) using `methodsview`.
```
methodsview(com.mathworks.mlservices.MLEditorServices)
```
I have a few related questions about using these Java methods.
Firstly, is there any documentation on these things (either from the Mathworks or otherwise)?
Secondly, how do you find out what methods are available? The ones I've come across appear to be contained in JAR files in matlabroot\java\jar, but I'm not sure what the best way to inspect a JAR file is.
Thirdly, are there functions for inspecting the classes, other than `methodsview`?
Finally, are there any really useful methods that anyone has found? | 2010/04/06 | [
"https://Stackoverflow.com/questions/2585429",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/134830/"
] | There is no official documentation nor support for these classes. Moreover, these classes and internal methods represent internal implementation that may change without notice in any future Matlab release. This said, you can use my [uiinspect](http://www.mathworks.com/matlabcentral/fileexchange/17935-uiinspect-display-methodspropertiescallbacks-of-an-object) and [checkClass](http://www.mathworks.com/matlabcentral/fileexchange/26947-checkclass) utilities to investigate the internal methods, properties and static fields. These utilities use Java reflection to do their job, something which is also done by the built-in ***methodsview*** function (I believe my utilities are far more powerful, though). In this respect, I believe we are not crossing the line of reverse-engineering which may violate Matlab's license.
If you are looking for documentation, then my [UndocumentedMatlab.com](http://UndocumentedMatlab.com) website has plenty of relevant resources, and more is added on a regular basis so keep tuned.
I am also working on a book that will present a very detailed overview of all these internal classes, among other undocumented stuff - I hope to have publication news later this year. | I am an eclipse fan. If you use that as your IDE, the jar can be imported into one of your projects and you can inspect the methods in there. |
10,121,715 | I am trying to increment progress bar and show percentage on a label. However, both remains without changes when "incrementaProgres" function is called. `IBOutlets` are properly linked on `xib` and also tested that, when function is called, variables have proper value. Thanks
from delegate:
```
loadingViewController *theInstanceP = [[loadingViewController alloc] init];
[theInstanceP performSelectorOnMainThread:@selector(incrementaProgres:) withObject:[NSNumber numberWithFloat:0.15] waitUntilDone:YES];
```
loadingView class:
```
- (void)viewDidLoad
{
[super viewDidLoad];
[spinner startAnimating];
[progress setProgress:0.0];
}
- (void)incrementaProgres: (CGFloat)increment{
[progress setProgress:(progresInc + increment)];
carrega.text = [NSString stringWithFormat: @"%f", (progresInc + increment)];
}
``` | 2012/04/12 | [
"https://Stackoverflow.com/questions/10121715",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/1238934/"
] | Progress bar's [progress](http://developer.apple.com/library/ios/#documentation/uikit/reference/UIProgressView_Class/Reference/Reference.html) value is between `0.0` and `1.0`, your code sets it in the increments of `15.0`, which is out of range. Your increment should be `0.15`, not `15.0`. | Progress is a value between 0.0 and 1.0.
Edit:
Did you try to call `[myView setNeedsDisplay];`?
2nd Edit:
Maybe there is one confusion: `viewDidLoad` is called right before you are presenting the view. Therefore in the code you have shown here `incrementaProgres:` is called before `viewDidLoad`. |
27,503,621 | I have the following code:
```
ids = set()
for result in text_results:
ids.add(str(result[5]))
for result in doc_results:
ids.add(str(result[4]))
```
Both `text_results` and `doc_results` are lists that contain other lists as items as you might have already guessed. Is there a more efficient way to do this using a nifty oneliner rather than two for loops? | 2014/12/16 | [
"https://Stackoverflow.com/questions/27503621",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/864413/"
] | I would probably write:
```
ids = set(str(result[5]) for result in text_results)
ids.update(str(result[4]) for result in doc_results)
```
As for efficiency, if you want to squeeze every possible bit of performance then you first need a realistic dataset, then you can try things like `map` (or `itertools.imap` in Python 2) and `operator.itemgetter`, to see what's faster.
If you absolutely must have a one-liner:
```
ids = set(itertools.chain((str(result[5]) for result in text_results), (str(result[4]) for result in doc_results)))
```
Although, if you want a one-liner it's also worth optimizing for conciseness so that your one-liner will be readable, and then seeing whether performance is adequate:
```
ids = set([str(x[5]) for x in text_results] + [str(x[4]) for x in doc_results]))
```
This "feels" inefficient because it concatenates two lists, which shouldn't be necessary. But that doesn't mean it really is inefficient for your data, so its worth including in your tests. | This one liner should work:
```
ids = set(map (lambda x: str(x[4]), doc_results) + map(lambda x: str(x[5]), text_results))
``` |
27,503,621 | I have the following code:
```
ids = set()
for result in text_results:
ids.add(str(result[5]))
for result in doc_results:
ids.add(str(result[4]))
```
Both `text_results` and `doc_results` are lists that contain other lists as items as you might have already guessed. Is there a more efficient way to do this using a nifty oneliner rather than two for loops? | 2014/12/16 | [
"https://Stackoverflow.com/questions/27503621",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/864413/"
] | I would probably write:
```
ids = set(str(result[5]) for result in text_results)
ids.update(str(result[4]) for result in doc_results)
```
As for efficiency, if you want to squeeze every possible bit of performance then you first need a realistic dataset, then you can try things like `map` (or `itertools.imap` in Python 2) and `operator.itemgetter`, to see what's faster.
If you absolutely must have a one-liner:
```
ids = set(itertools.chain((str(result[5]) for result in text_results), (str(result[4]) for result in doc_results)))
```
Although, if you want a one-liner it's also worth optimizing for conciseness so that your one-liner will be readable, and then seeing whether performance is adequate:
```
ids = set([str(x[5]) for x in text_results] + [str(x[4]) for x in doc_results]))
```
This "feels" inefficient because it concatenates two lists, which shouldn't be necessary. But that doesn't mean it really is inefficient for your data, so its worth including in your tests. | This (wrapped) one liner should work:
```
ids = set([str(tr[5]) for tr in text_results] +
[str(dr[4]) for dr in doc_results])
``` |
27,503,621 | I have the following code:
```
ids = set()
for result in text_results:
ids.add(str(result[5]))
for result in doc_results:
ids.add(str(result[4]))
```
Both `text_results` and `doc_results` are lists that contain other lists as items as you might have already guessed. Is there a more efficient way to do this using a nifty oneliner rather than two for loops? | 2014/12/16 | [
"https://Stackoverflow.com/questions/27503621",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/864413/"
] | I would probably write:
```
ids = set(str(result[5]) for result in text_results)
ids.update(str(result[4]) for result in doc_results)
```
As for efficiency, if you want to squeeze every possible bit of performance then you first need a realistic dataset, then you can try things like `map` (or `itertools.imap` in Python 2) and `operator.itemgetter`, to see what's faster.
If you absolutely must have a one-liner:
```
ids = set(itertools.chain((str(result[5]) for result in text_results), (str(result[4]) for result in doc_results)))
```
Although, if you want a one-liner it's also worth optimizing for conciseness so that your one-liner will be readable, and then seeing whether performance is adequate:
```
ids = set([str(x[5]) for x in text_results] + [str(x[4]) for x in doc_results]))
```
This "feels" inefficient because it concatenates two lists, which shouldn't be necessary. But that doesn't mean it really is inefficient for your data, so its worth including in your tests. | Do this:
```
ids = {str(i) for text, doc in zip(text_results, doc_results) for i in (text[5], doc[4])}
```
This is assuming results is something like:
```
text_results = [['t11', 't12', 't13', 't14', 't15', 't16'], ['t21', 't22', 't23', 't24', 't25', 't26']]
doc_results = [['d11', 'd12', 'd13', 'd14', 'd15', 'd16'], ['d21', 'd22', 'd23', 'd24', 'd25', 'd26']]
```
And you want:
```
ids = {'d15', 't26', 't16', 'd25'}
``` |
27,503,621 | I have the following code:
```
ids = set()
for result in text_results:
ids.add(str(result[5]))
for result in doc_results:
ids.add(str(result[4]))
```
Both `text_results` and `doc_results` are lists that contain other lists as items as you might have already guessed. Is there a more efficient way to do this using a nifty oneliner rather than two for loops? | 2014/12/16 | [
"https://Stackoverflow.com/questions/27503621",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/864413/"
] | I would probably write:
```
ids = set(str(result[5]) for result in text_results)
ids.update(str(result[4]) for result in doc_results)
```
As for efficiency, if you want to squeeze every possible bit of performance then you first need a realistic dataset, then you can try things like `map` (or `itertools.imap` in Python 2) and `operator.itemgetter`, to see what's faster.
If you absolutely must have a one-liner:
```
ids = set(itertools.chain((str(result[5]) for result in text_results), (str(result[4]) for result in doc_results)))
```
Although, if you want a one-liner it's also worth optimizing for conciseness so that your one-liner will be readable, and then seeing whether performance is adequate:
```
ids = set([str(x[5]) for x in text_results] + [str(x[4]) for x in doc_results]))
```
This "feels" inefficient because it concatenates two lists, which shouldn't be necessary. But that doesn't mean it really is inefficient for your data, so its worth including in your tests. | I guess this is a more pythonic way:
```
map(str,set([i[5] for i in text_results]+[i[4] for i in doc_results]))
```
Demo:
```
>>> text_results = [[1,2,3,4,5,6,7,8,9],[1,2,3,4,56,6],[4,5,6,1,2,6,22],[1,2,3,4,5,7,8,9]]
>>> doc_results = [[1,2,3,4,5,9,7,8,9],[1,2,3,4,56,3],[4,5,6,1,2,7,22],[1,2,3,4,5,7,7,9]]
>>> map(str,set([i[5] for i in text_results]+[i[4] for i in doc_results]))
['56', '2', '5', '6', '7']
``` |
59,030,684 | I am trying to see test coverage line by line in a class, however, only the first line is highlighted.
[](https://i.stack.imgur.com/uW3o7.png)
The *Show Inline Statistics* setting is enabled.
[](https://i.stack.imgur.com/H4R7a.png)
I get the test coverage for the **class**, **methods** and **lines** as below:
[](https://i.stack.imgur.com/gydYw.png)
I remember this worked in a previous version of Android Studio (ca't exactly remember which). How can enable the feature so that coverage is shown for all lines. | 2019/11/25 | [
"https://Stackoverflow.com/questions/59030684",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/6275633/"
] | Step 1 -
Run **testDebugUnitTest** with coverage
[Click here to see unit test coverage](https://i.stack.imgur.com/Yy5oF.png)
Step 2 -
Generate coverage report - click on icon as shown in above image (yellow highlighted) give exported path to generate html file.
Step 3 - Click on index.html file to view report.
You will get test coverage percentage for **class, method and line** as shown in below image
[Click here to see test coverage class](https://i.stack.imgur.com/guNFM.png)
[click here to see overall coverage summary](https://i.stack.imgur.com/JWvoT.png) | Run the test with coverage, then you can see it line by line:
[](https://i.stack.imgur.com/q8pgp.png) |
23,323,344 | I am working with a label and form which I want to center in the row, but encountering difficulties to do that. The label wont move to center next to the input field without moving the field down. This is the code:
```
<div class="row">
<div class="col-md-6">
<div class="form-group">
<label class="col-md-6 control-label pull right">Password: </label>
<div class="col-md-6">
<input type="text" name="Password" class='form-control' />
</div>
</div>
</div>
</div>
``` | 2014/04/27 | [
"https://Stackoverflow.com/questions/23323344",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/3185936/"
] | I assume that you'd like to extract the first of two numbers in each string.
You may use the `stri_extract_first_regex` function from the [stringi](http://stringi.rexamine.com) package:
```
library(stringi)
stri_extract_first_regex(c("Pic 26+25", "Pic 1,2,3", "no pics"), "[0-9]+")
## [1] "26" "1" NA
``` | To follow up your `strsplit` attempt:
```
# split the strings
l <- strsplit(x = c("Pic 26 + 25", "Pic 27 + 28"), split = " ")
l
# [[1]]
# [1] "Pic" "26" "+" "25"
#
# [[2]]
# [1] "Pic" "27" "+" "28"
# extract relevant part from each list element and convert to numeric
as.numeric(lapply(l , `[`, 2))
# [1] 26 27
``` |
23,323,344 | I am working with a label and form which I want to center in the row, but encountering difficulties to do that. The label wont move to center next to the input field without moving the field down. This is the code:
```
<div class="row">
<div class="col-md-6">
<div class="form-group">
<label class="col-md-6 control-label pull right">Password: </label>
<div class="col-md-6">
<input type="text" name="Password" class='form-control' />
</div>
</div>
</div>
</div>
``` | 2014/04/27 | [
"https://Stackoverflow.com/questions/23323344",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/3185936/"
] | I assume that you'd like to extract the first of two numbers in each string.
You may use the `stri_extract_first_regex` function from the [stringi](http://stringi.rexamine.com) package:
```
library(stringi)
stri_extract_first_regex(c("Pic 26+25", "Pic 1,2,3", "no pics"), "[0-9]+")
## [1] "26" "1" NA
``` | In the responses below we use this test data:
```
# test data
v1 <- c("Pic 26 + 25", "Pic 27 + 28", "Pic 28 + 27", "Pic 29 + 30",
"Pic 30 + 29", "Pic 31 + 32")
```
**1) gsubfn**
```
library(gsubfn)
strapply(v1, "(\\d+).*", as.numeric, simplify = c)
## [1] 26 27 28 29 30 31
```
**2) sub** This requires no packages but does involve a slightly longer regular expression:
```
as.numeric( sub("\\D*(\\d+).*", "\\1", v1) )
## [1] 26 27 28 29 30 31
```
**3) read.table** This involves no regular expressions or packages:
```
read.table(text = v1, fill = TRUE)[[2]]
## [1] 26 27 28 29 30 31
```
In this particular example the `fill=TRUE` could be omitted but it might be needed if the components of `v1` had a differing number of fields. |
23,323,344 | I am working with a label and form which I want to center in the row, but encountering difficulties to do that. The label wont move to center next to the input field without moving the field down. This is the code:
```
<div class="row">
<div class="col-md-6">
<div class="form-group">
<label class="col-md-6 control-label pull right">Password: </label>
<div class="col-md-6">
<input type="text" name="Password" class='form-control' />
</div>
</div>
</div>
</div>
``` | 2014/04/27 | [
"https://Stackoverflow.com/questions/23323344",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/3185936/"
] | I assume that you'd like to extract the first of two numbers in each string.
You may use the `stri_extract_first_regex` function from the [stringi](http://stringi.rexamine.com) package:
```
library(stringi)
stri_extract_first_regex(c("Pic 26+25", "Pic 1,2,3", "no pics"), "[0-9]+")
## [1] "26" "1" NA
``` | You can do this very nicely with the `str_first_number()` function from the `strex` package, or for more general needs, you can use the `str_nth_number()` function. Install it with `install.packages("strex")`.
```
library(strex)
#> Loading required package: stringr
strings <- c("Pic 26 + 25", "Pic 27 + 28", "Pic 28 + 27",
"Pic 29 + 30", "Pic 30 + 29", "Pic 31 + 32")
str_first_number(strings)
#> [1] 26 27 28 29 30 31
str_nth_number(strings, n = 1)
#> [1] 26 27 28 29 30 31
``` |
23,323,344 | I am working with a label and form which I want to center in the row, but encountering difficulties to do that. The label wont move to center next to the input field without moving the field down. This is the code:
```
<div class="row">
<div class="col-md-6">
<div class="form-group">
<label class="col-md-6 control-label pull right">Password: </label>
<div class="col-md-6">
<input type="text" name="Password" class='form-control' />
</div>
</div>
</div>
</div>
``` | 2014/04/27 | [
"https://Stackoverflow.com/questions/23323344",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/3185936/"
] | I assume that you'd like to extract the first of two numbers in each string.
You may use the `stri_extract_first_regex` function from the [stringi](http://stringi.rexamine.com) package:
```
library(stringi)
stri_extract_first_regex(c("Pic 26+25", "Pic 1,2,3", "no pics"), "[0-9]+")
## [1] "26" "1" NA
``` | With `str_extract` from `stringr`:
```
library(stringr)
vec = c("Pic 26 + 25", "Pic 27 + 28", "Pic 28 + 27",
"Pic 29 + 30", "Pic 30 + 29", "Pic 31 + 32")
str_extract(v1, "[0-9]+")
# [1] "26" "27" "28" "29" "30" "31"
``` |
23,323,344 | I am working with a label and form which I want to center in the row, but encountering difficulties to do that. The label wont move to center next to the input field without moving the field down. This is the code:
```
<div class="row">
<div class="col-md-6">
<div class="form-group">
<label class="col-md-6 control-label pull right">Password: </label>
<div class="col-md-6">
<input type="text" name="Password" class='form-control' />
</div>
</div>
</div>
</div>
``` | 2014/04/27 | [
"https://Stackoverflow.com/questions/23323344",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/3185936/"
] | In the responses below we use this test data:
```
# test data
v1 <- c("Pic 26 + 25", "Pic 27 + 28", "Pic 28 + 27", "Pic 29 + 30",
"Pic 30 + 29", "Pic 31 + 32")
```
**1) gsubfn**
```
library(gsubfn)
strapply(v1, "(\\d+).*", as.numeric, simplify = c)
## [1] 26 27 28 29 30 31
```
**2) sub** This requires no packages but does involve a slightly longer regular expression:
```
as.numeric( sub("\\D*(\\d+).*", "\\1", v1) )
## [1] 26 27 28 29 30 31
```
**3) read.table** This involves no regular expressions or packages:
```
read.table(text = v1, fill = TRUE)[[2]]
## [1] 26 27 28 29 30 31
```
In this particular example the `fill=TRUE` could be omitted but it might be needed if the components of `v1` had a differing number of fields. | To follow up your `strsplit` attempt:
```
# split the strings
l <- strsplit(x = c("Pic 26 + 25", "Pic 27 + 28"), split = " ")
l
# [[1]]
# [1] "Pic" "26" "+" "25"
#
# [[2]]
# [1] "Pic" "27" "+" "28"
# extract relevant part from each list element and convert to numeric
as.numeric(lapply(l , `[`, 2))
# [1] 26 27
``` |
23,323,344 | I am working with a label and form which I want to center in the row, but encountering difficulties to do that. The label wont move to center next to the input field without moving the field down. This is the code:
```
<div class="row">
<div class="col-md-6">
<div class="form-group">
<label class="col-md-6 control-label pull right">Password: </label>
<div class="col-md-6">
<input type="text" name="Password" class='form-control' />
</div>
</div>
</div>
</div>
``` | 2014/04/27 | [
"https://Stackoverflow.com/questions/23323344",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/3185936/"
] | You can do this very nicely with the `str_first_number()` function from the `strex` package, or for more general needs, you can use the `str_nth_number()` function. Install it with `install.packages("strex")`.
```
library(strex)
#> Loading required package: stringr
strings <- c("Pic 26 + 25", "Pic 27 + 28", "Pic 28 + 27",
"Pic 29 + 30", "Pic 30 + 29", "Pic 31 + 32")
str_first_number(strings)
#> [1] 26 27 28 29 30 31
str_nth_number(strings, n = 1)
#> [1] 26 27 28 29 30 31
``` | To follow up your `strsplit` attempt:
```
# split the strings
l <- strsplit(x = c("Pic 26 + 25", "Pic 27 + 28"), split = " ")
l
# [[1]]
# [1] "Pic" "26" "+" "25"
#
# [[2]]
# [1] "Pic" "27" "+" "28"
# extract relevant part from each list element and convert to numeric
as.numeric(lapply(l , `[`, 2))
# [1] 26 27
``` |
23,323,344 | I am working with a label and form which I want to center in the row, but encountering difficulties to do that. The label wont move to center next to the input field without moving the field down. This is the code:
```
<div class="row">
<div class="col-md-6">
<div class="form-group">
<label class="col-md-6 control-label pull right">Password: </label>
<div class="col-md-6">
<input type="text" name="Password" class='form-control' />
</div>
</div>
</div>
</div>
``` | 2014/04/27 | [
"https://Stackoverflow.com/questions/23323344",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/3185936/"
] | With `str_extract` from `stringr`:
```
library(stringr)
vec = c("Pic 26 + 25", "Pic 27 + 28", "Pic 28 + 27",
"Pic 29 + 30", "Pic 30 + 29", "Pic 31 + 32")
str_extract(v1, "[0-9]+")
# [1] "26" "27" "28" "29" "30" "31"
``` | To follow up your `strsplit` attempt:
```
# split the strings
l <- strsplit(x = c("Pic 26 + 25", "Pic 27 + 28"), split = " ")
l
# [[1]]
# [1] "Pic" "26" "+" "25"
#
# [[2]]
# [1] "Pic" "27" "+" "28"
# extract relevant part from each list element and convert to numeric
as.numeric(lapply(l , `[`, 2))
# [1] 26 27
``` |
23,323,344 | I am working with a label and form which I want to center in the row, but encountering difficulties to do that. The label wont move to center next to the input field without moving the field down. This is the code:
```
<div class="row">
<div class="col-md-6">
<div class="form-group">
<label class="col-md-6 control-label pull right">Password: </label>
<div class="col-md-6">
<input type="text" name="Password" class='form-control' />
</div>
</div>
</div>
</div>
``` | 2014/04/27 | [
"https://Stackoverflow.com/questions/23323344",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/3185936/"
] | In the responses below we use this test data:
```
# test data
v1 <- c("Pic 26 + 25", "Pic 27 + 28", "Pic 28 + 27", "Pic 29 + 30",
"Pic 30 + 29", "Pic 31 + 32")
```
**1) gsubfn**
```
library(gsubfn)
strapply(v1, "(\\d+).*", as.numeric, simplify = c)
## [1] 26 27 28 29 30 31
```
**2) sub** This requires no packages but does involve a slightly longer regular expression:
```
as.numeric( sub("\\D*(\\d+).*", "\\1", v1) )
## [1] 26 27 28 29 30 31
```
**3) read.table** This involves no regular expressions or packages:
```
read.table(text = v1, fill = TRUE)[[2]]
## [1] 26 27 28 29 30 31
```
In this particular example the `fill=TRUE` could be omitted but it might be needed if the components of `v1` had a differing number of fields. | You can do this very nicely with the `str_first_number()` function from the `strex` package, or for more general needs, you can use the `str_nth_number()` function. Install it with `install.packages("strex")`.
```
library(strex)
#> Loading required package: stringr
strings <- c("Pic 26 + 25", "Pic 27 + 28", "Pic 28 + 27",
"Pic 29 + 30", "Pic 30 + 29", "Pic 31 + 32")
str_first_number(strings)
#> [1] 26 27 28 29 30 31
str_nth_number(strings, n = 1)
#> [1] 26 27 28 29 30 31
``` |
23,323,344 | I am working with a label and form which I want to center in the row, but encountering difficulties to do that. The label wont move to center next to the input field without moving the field down. This is the code:
```
<div class="row">
<div class="col-md-6">
<div class="form-group">
<label class="col-md-6 control-label pull right">Password: </label>
<div class="col-md-6">
<input type="text" name="Password" class='form-control' />
</div>
</div>
</div>
</div>
``` | 2014/04/27 | [
"https://Stackoverflow.com/questions/23323344",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/3185936/"
] | In the responses below we use this test data:
```
# test data
v1 <- c("Pic 26 + 25", "Pic 27 + 28", "Pic 28 + 27", "Pic 29 + 30",
"Pic 30 + 29", "Pic 31 + 32")
```
**1) gsubfn**
```
library(gsubfn)
strapply(v1, "(\\d+).*", as.numeric, simplify = c)
## [1] 26 27 28 29 30 31
```
**2) sub** This requires no packages but does involve a slightly longer regular expression:
```
as.numeric( sub("\\D*(\\d+).*", "\\1", v1) )
## [1] 26 27 28 29 30 31
```
**3) read.table** This involves no regular expressions or packages:
```
read.table(text = v1, fill = TRUE)[[2]]
## [1] 26 27 28 29 30 31
```
In this particular example the `fill=TRUE` could be omitted but it might be needed if the components of `v1` had a differing number of fields. | With `str_extract` from `stringr`:
```
library(stringr)
vec = c("Pic 26 + 25", "Pic 27 + 28", "Pic 28 + 27",
"Pic 29 + 30", "Pic 30 + 29", "Pic 31 + 32")
str_extract(v1, "[0-9]+")
# [1] "26" "27" "28" "29" "30" "31"
``` |
30,778,140 | Hi I am using `gem 'carmen-rails'`
In my view I have written this
```
<%= f.country_select :country, prompt: 'Please select a country',
:id=>'curr-country' %>
```
but its not taking this id 'curr-country'. Please guide how to give id in this.
Thanks in advance. | 2015/06/11 | [
"https://Stackoverflow.com/questions/30778140",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/2739770/"
] | You'll have to pass a second hash with the HTML options:
```
<%= f.country_select :country,
{ prompt: 'Please select a country' },
{ id: 'curr-country' } %>
```
The `carmen-rails` gem doesn't document this explicitly (it is documented [in code](https://github.com/jim/carmen-rails/blob/50ebda9ac696306abdfc6ebd75af06cd79de2ded/lib/carmen/rails/action_view/form_helper.rb#L54)). The `country_select` gem, however, does provide an example of this in the [Usage section of the `README`](https://github.com/stefanpenner/country_select#usage) | ```
<%= f.country_select :country, {id: 'curr-country', prompt: 'Please select a country'} %>
```
try this |
30,778,140 | Hi I am using `gem 'carmen-rails'`
In my view I have written this
```
<%= f.country_select :country, prompt: 'Please select a country',
:id=>'curr-country' %>
```
but its not taking this id 'curr-country'. Please guide how to give id in this.
Thanks in advance. | 2015/06/11 | [
"https://Stackoverflow.com/questions/30778140",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/2739770/"
] | You'll have to pass a second hash with the HTML options:
```
<%= f.country_select :country,
{ prompt: 'Please select a country' },
{ id: 'curr-country' } %>
```
The `carmen-rails` gem doesn't document this explicitly (it is documented [in code](https://github.com/jim/carmen-rails/blob/50ebda9ac696306abdfc6ebd75af06cd79de2ded/lib/carmen/rails/action_view/form_helper.rb#L54)). The `country_select` gem, however, does provide an example of this in the [Usage section of the `README`](https://github.com/stefanpenner/country_select#usage) | Try this
```
<%= f.country_select :country, {priority: %w(US CA)}, {prompt: 'Please select a country'}, {:id => 'your-id'} %>
```
Hope this will help you. |
30,778,140 | Hi I am using `gem 'carmen-rails'`
In my view I have written this
```
<%= f.country_select :country, prompt: 'Please select a country',
:id=>'curr-country' %>
```
but its not taking this id 'curr-country'. Please guide how to give id in this.
Thanks in advance. | 2015/06/11 | [
"https://Stackoverflow.com/questions/30778140",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/2739770/"
] | You'll have to pass a second hash with the HTML options:
```
<%= f.country_select :country,
{ prompt: 'Please select a country' },
{ id: 'curr-country' } %>
```
The `carmen-rails` gem doesn't document this explicitly (it is documented [in code](https://github.com/jim/carmen-rails/blob/50ebda9ac696306abdfc6ebd75af06cd79de2ded/lib/carmen/rails/action_view/form_helper.rb#L54)). The `country_select` gem, however, does provide an example of this in the [Usage section of the `README`](https://github.com/stefanpenner/country_select#usage) | ```
<%= f.country_select :country, {}, class: "form-control" %>
```
Try this one :) |
203,578 | As the question says, where do each of the browsers store their offline data, be it cache, offline storage from html5, images, flash videos or anything web related that gets stored locally. | 2012/10/20 | [
"https://askubuntu.com/questions/203578",
"https://askubuntu.com",
"https://askubuntu.com/users/7035/"
] | Firefox store the offline data in `~/.mozilla` directory, to be more specific in `~/.mozilla/profiles/xxxxxxxx.default` directory.
Chrome uses `~/.cache/google-chrome` directory for storing cache. Google chrome also uses `~/.config/google-chrome/Default` directory for storing recent history, tabs and other things.
Like Chrome, Chromium uses as such with only the name changed. That is `~/.cache/chromium` and `~/.config/chromium/Default` | I've just found that the flatpak chromium uses
```
~/.var/app/org.chromium.Chromium/cache
```
On Firefox I use the browser.cache.disk.parent\_directory "preference" in about:config to get it to use somewhere that's not backed up, to reduce backup sizes. |
17,718,922 | I have two classes
* Author with attributes id, papers (Paper relationship), ...
* Paper with attributes id, mainAuthor (Author relationship), authors (Author relationship) ...
and want to map some JSON to it
```
"authors": [
{
"id": 123,
"papers": [
{
"id": 1,
"main_author_id": 123,
...
},
...
]
},
...
]
```
The problem is that the JSON is not structured like
```
"authors": [
{
"id": 123,
"papers": [
{
"id": 1,
"main_author": {
"id": 123
}
...
},
...
]
},
...
]
```
so that I could easily map things (note the \*main\_author\* part of both JSON examples). I tried using mapping this value without a key path as explained [here](https://github.com/RestKit/RestKit/wiki/Object-Mapping#mapping-values-without-key-paths):
```
[authorMapping addAttributeMappingToKeyOfRepresentationFromAttribute:@"main_author_id"];
[authorMapping addAttributeMappingsFromDictionary:@{@"(main_author_id)": @"id"}];
```
but I'm getting an error telling me that the keyPath *id* already exists and I may not add a second mapping for this keyPath. I totally understand this error, but I have no idea how to map from \*main\_author\_id\* back to *id*. Changing the data source may be the best solution, but this is unfortunately not possible.
Any suggestion is highly welcome! Thanks! | 2013/07/18 | [
"https://Stackoverflow.com/questions/17718922",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/184245/"
] | This is exactly what foreign key mapping is for. It allows you to temporarily store the 'identity' value that you're provided with and then RestKit will find the appropriate object and complete the relationship. | Apart from the Answer @Wain (foreign key mapping) provided, it is also possible to implement a custom serialization (c.f. [RKSerialization](http://restkit.org/api/latest/Protocols/RKSerialization.html)) and modify the objects before mapping takes place. However, the aforementioned method is superior to this (somehow ugly) solution. |
12,157,558 | I am learning matlab myself andI have made an animated plot using matlab;now i want to save it as an video file.can you tell me how to convert my animation into a video file in matlab.Below is my code
```
x=[1:2];
for i=1:25,
m=randi([3,5]);
n=randi([3,5]);
y=[m n];
bar(x,y)
axis equal
A(i) = getframe;
end
```
matlab version 7.8 R2009a | 2012/08/28 | [
"https://Stackoverflow.com/questions/12157558",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/996366/"
] | use avifile:
```
aviobj = avifile('example.avi','compression','None');
x=[1:2];
for i=1:25,
m=randi([3,5]);
n=randi([3,5]);
y=[m n];
bar(x,y)
axis equal
aviobj = addframe(aviobj,gcf);
drawnow
end
viobj = close(aviobj)
``` | One way to do this is to [print](http://www.mathworks.com.au/help/techdoc/ref/print.html) the figure to an image, and then stitch the resulting image sequence into a video. [ffmpeg](http://ffmpeg.org/) and [mencoder](http://www.mplayerhq.hu/) are great tools for doing this. There are some great resources for describing this if you know the right search terms. I like this [one](http://electron.mit.edu/~gsteele/ffmpeg/)
In mencoder, you could stitch your images together with a command like:
```
mencoder "mf://*.jpg" -mf fps=10 -o test.avi -ovc lavc -lavcopts vcodec=msmpeg4v2:vbitrate=800
``` |
12,157,558 | I am learning matlab myself andI have made an animated plot using matlab;now i want to save it as an video file.can you tell me how to convert my animation into a video file in matlab.Below is my code
```
x=[1:2];
for i=1:25,
m=randi([3,5]);
n=randi([3,5]);
y=[m n];
bar(x,y)
axis equal
A(i) = getframe;
end
```
matlab version 7.8 R2009a | 2012/08/28 | [
"https://Stackoverflow.com/questions/12157558",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/996366/"
] | If Matlab's avifile doesn't work (it might have problems with codecs of 64-bit OS), then use mmwrite.
<http://www.mathworks.com/matlabcentral/fileexchange/15881-mmwrite>
It's simple, and it works. I used it to create \*.wmv files simply by:
`mmwrite(filename, frames);`
Edit: code example
```
% set params
fps = 25;
n_samples = 5 * fps;
filename = 'd:/rand.wmv';
% allocate frames struct
fig = figure;
f = getframe(fig);
mov = struct('frames', repmat(f, n_samples, 1), ...
'times', (1 : n_samples)' / fps, ...
'width', size(f.cdata, 2), ...
'height', size(f.cdata, 1));
% generate frames
for k = 1 : n_samples
imagesc(rand(100), [0, 1]);
drawnow;
mov.frames(k) = getframe(fig);
end
% save (assuming mmwrite.m is in the path)
mmwrite(filename, mov);
``` | One way to do this is to [print](http://www.mathworks.com.au/help/techdoc/ref/print.html) the figure to an image, and then stitch the resulting image sequence into a video. [ffmpeg](http://ffmpeg.org/) and [mencoder](http://www.mplayerhq.hu/) are great tools for doing this. There are some great resources for describing this if you know the right search terms. I like this [one](http://electron.mit.edu/~gsteele/ffmpeg/)
In mencoder, you could stitch your images together with a command like:
```
mencoder "mf://*.jpg" -mf fps=10 -o test.avi -ovc lavc -lavcopts vcodec=msmpeg4v2:vbitrate=800
``` |
12,157,558 | I am learning matlab myself andI have made an animated plot using matlab;now i want to save it as an video file.can you tell me how to convert my animation into a video file in matlab.Below is my code
```
x=[1:2];
for i=1:25,
m=randi([3,5]);
n=randi([3,5]);
y=[m n];
bar(x,y)
axis equal
A(i) = getframe;
end
```
matlab version 7.8 R2009a | 2012/08/28 | [
"https://Stackoverflow.com/questions/12157558",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/996366/"
] | use avifile:
```
aviobj = avifile('example.avi','compression','None');
x=[1:2];
for i=1:25,
m=randi([3,5]);
n=randi([3,5]);
y=[m n];
bar(x,y)
axis equal
aviobj = addframe(aviobj,gcf);
drawnow
end
viobj = close(aviobj)
``` | Have a look at [`VideoWriter`](https://uk.mathworks.com/help/matlab/ref/videowriter.html) or see this [`forum discussion`](https://uk.mathworks.com/matlabcentral/answers/455886-how-to-save-animated-plots#answer_370280) |
12,157,558 | I am learning matlab myself andI have made an animated plot using matlab;now i want to save it as an video file.can you tell me how to convert my animation into a video file in matlab.Below is my code
```
x=[1:2];
for i=1:25,
m=randi([3,5]);
n=randi([3,5]);
y=[m n];
bar(x,y)
axis equal
A(i) = getframe;
end
```
matlab version 7.8 R2009a | 2012/08/28 | [
"https://Stackoverflow.com/questions/12157558",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/996366/"
] | If Matlab's avifile doesn't work (it might have problems with codecs of 64-bit OS), then use mmwrite.
<http://www.mathworks.com/matlabcentral/fileexchange/15881-mmwrite>
It's simple, and it works. I used it to create \*.wmv files simply by:
`mmwrite(filename, frames);`
Edit: code example
```
% set params
fps = 25;
n_samples = 5 * fps;
filename = 'd:/rand.wmv';
% allocate frames struct
fig = figure;
f = getframe(fig);
mov = struct('frames', repmat(f, n_samples, 1), ...
'times', (1 : n_samples)' / fps, ...
'width', size(f.cdata, 2), ...
'height', size(f.cdata, 1));
% generate frames
for k = 1 : n_samples
imagesc(rand(100), [0, 1]);
drawnow;
mov.frames(k) = getframe(fig);
end
% save (assuming mmwrite.m is in the path)
mmwrite(filename, mov);
``` | Have a look at [`VideoWriter`](https://uk.mathworks.com/help/matlab/ref/videowriter.html) or see this [`forum discussion`](https://uk.mathworks.com/matlabcentral/answers/455886-how-to-save-animated-plots#answer_370280) |
12,157,558 | I am learning matlab myself andI have made an animated plot using matlab;now i want to save it as an video file.can you tell me how to convert my animation into a video file in matlab.Below is my code
```
x=[1:2];
for i=1:25,
m=randi([3,5]);
n=randi([3,5]);
y=[m n];
bar(x,y)
axis equal
A(i) = getframe;
end
```
matlab version 7.8 R2009a | 2012/08/28 | [
"https://Stackoverflow.com/questions/12157558",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/996366/"
] | use avifile:
```
aviobj = avifile('example.avi','compression','None');
x=[1:2];
for i=1:25,
m=randi([3,5]);
n=randi([3,5]);
y=[m n];
bar(x,y)
axis equal
aviobj = addframe(aviobj,gcf);
drawnow
end
viobj = close(aviobj)
``` | If Matlab's avifile doesn't work (it might have problems with codecs of 64-bit OS), then use mmwrite.
<http://www.mathworks.com/matlabcentral/fileexchange/15881-mmwrite>
It's simple, and it works. I used it to create \*.wmv files simply by:
`mmwrite(filename, frames);`
Edit: code example
```
% set params
fps = 25;
n_samples = 5 * fps;
filename = 'd:/rand.wmv';
% allocate frames struct
fig = figure;
f = getframe(fig);
mov = struct('frames', repmat(f, n_samples, 1), ...
'times', (1 : n_samples)' / fps, ...
'width', size(f.cdata, 2), ...
'height', size(f.cdata, 1));
% generate frames
for k = 1 : n_samples
imagesc(rand(100), [0, 1]);
drawnow;
mov.frames(k) = getframe(fig);
end
% save (assuming mmwrite.m is in the path)
mmwrite(filename, mov);
``` |
71,941,740 | I have installed Visual Studio 2022 on my PC today. I have an old app, which targets .NET 4.5. I see this error when attempting to build/compile the project:
"Error MSB3644 The reference assemblies for .NETFramework,Version=v4.5 were not found. To resolve this, install the Developer Pack (SDK/Targeting Pack) for this framework version or retarget your application. You can download .NET Framework Developer Packs at [https://aka.ms/msbuild/developerpacks"](https://aka.ms/msbuild/developerpacks%22)
I have read this: <https://thomaslevesque.com/2021/11/12/building-a-project-that-target-net-45-in-visual-studio-2022/>. C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.5 already exists on my PC.
I have downloaded the .NET 4.5 Developer Pack here: <https://learn.microsoft.com/en-gb/dotnet/framework/install/guide-for-developers>. I see this when I attempt to run it:
[](https://i.stack.imgur.com/5PtsJ.png)
Is there anything else I can try? | 2022/04/20 | [
"https://Stackoverflow.com/questions/71941740",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/937440/"
] | Because you might install a higher version of .net framework firstly, so installer might stop you install a lower version of .net framework
There is another way can try to fix it without reinstalling.
1. Download [Microsoft.NETFramework.ReferenceAssemblies.net45](https://www.nuget.org/packages/microsoft.netframework.referenceassemblies.net45) package file
[](https://i.stack.imgur.com/DaWmb.png)
2. Modify the file extension name from `microsoft.netframework.referenceassemblies.net45.nupkg` to `microsoft.netframework.referenceassemblies.net45.zip` and Unzip that
3. Copy the files from `build\.NETFramework\v4.5\` to `C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5`
4. Running your project again.
**Note**
This way was also work for .net4.0 [Microsoft.NETFramework.ReferenceAssemblies.net40](https://www.nuget.org/packages/Microsoft.NETFramework.ReferenceAssemblies.net40/) or other [older version of .net framework](https://www.nuget.org/packages?q=Microsoft.NETFramework.ReferenceAssemblies) which Microsoft might not support in feature | If you want a less hacky way, another option is to download the VS2017 Build Tools and install the .NET Framework 4.5 Targeting Pack only (from the tab Individual Components). This works fine with Visual Studio 2022, since it installs the reference assemblies where they are needed.
[](https://i.stack.imgur.com/YGVcI.jpg) |
29,268,013 | I am having MAJOR usort() issues! :( So basically I want to sort my array by their values. I would like the values to display in this order: Platinum, Gold, Silver, Bronze, Complete, None, Uncomplete. Now I can sort them well, but I would like to preserve their key (is that possible?). here is my code:
```
function compareMedals( $a, $b ) {
$aMap = array(1 => 'Platinum', 2 => 'Gold', 3 => 'Silver', 4 => 'Bronze', 5 => 'Complete', 6 => 'None', 7 => 'Uncomplete');
$aValues = array( 1, 2, 3, 4, 5, 6, 7);
$a = str_ireplace($aMap, $aValues, $a);
$b = str_ireplace($aMap, $aValues, $b);
return $a - $b;
}
usort($list, 'compareMedals');
```
So is it possible to sort them WHILE preserving their keys? Thank You! :)
**EDIT**
Array:
```
$array = array("post1" => 'Platinum', "Post2" => "Bronze, "Post3" = > Gold)
```
Should output:
```
"Post1" => 'Platinum',
"Post3" => 'Gold',
"Post2" => 'Bronze'
```
Yet it is outputting this:
```
"0" => 'Platinum',
"1" => 'Gold',
"2" => 'Bronze'
``` | 2015/03/25 | [
"https://Stackoverflow.com/questions/29268013",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/4492877/"
] | Just use `uasort` intead of `usort`. Definition of `uasort` is
>
> Sort an array with a user-defined comparison function and maintain
> index association.
>
>
>
There is an example of code with your comparing function and uasort:
```
$list = array('post1' => 'Gold', 'post2' => 'None', 'post3' => 'Platinum');
function compareMedals( $a, $b ) {
$aMap = array(1 => 'Platinum', 2 => 'Gold', 3 => 'Silver', 4 => 'Bronze', 5 => 'Complete', 6 => 'None', 7 => 'Uncomplete');
$aValues = array( 1, 2, 3, 4, 5, 6, 7);
$a = str_ireplace($aMap, $aValues, $a);
$b = str_ireplace($aMap, $aValues, $b);
return $a - $b;
}
uasort($list, 'compareMedals');
print_r($list);
```
That code gives result
```
Array
(
[post3] => Platinum
[post1] => Gold
[post2] => None
)
``` | `usort` did not preserve the key, if you want to preserve key after sort then you should use `asort`. Hope this help you. |
29,268,013 | I am having MAJOR usort() issues! :( So basically I want to sort my array by their values. I would like the values to display in this order: Platinum, Gold, Silver, Bronze, Complete, None, Uncomplete. Now I can sort them well, but I would like to preserve their key (is that possible?). here is my code:
```
function compareMedals( $a, $b ) {
$aMap = array(1 => 'Platinum', 2 => 'Gold', 3 => 'Silver', 4 => 'Bronze', 5 => 'Complete', 6 => 'None', 7 => 'Uncomplete');
$aValues = array( 1, 2, 3, 4, 5, 6, 7);
$a = str_ireplace($aMap, $aValues, $a);
$b = str_ireplace($aMap, $aValues, $b);
return $a - $b;
}
usort($list, 'compareMedals');
```
So is it possible to sort them WHILE preserving their keys? Thank You! :)
**EDIT**
Array:
```
$array = array("post1" => 'Platinum', "Post2" => "Bronze, "Post3" = > Gold)
```
Should output:
```
"Post1" => 'Platinum',
"Post3" => 'Gold',
"Post2" => 'Bronze'
```
Yet it is outputting this:
```
"0" => 'Platinum',
"1" => 'Gold',
"2" => 'Bronze'
``` | 2015/03/25 | [
"https://Stackoverflow.com/questions/29268013",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/4492877/"
] | Just use `uasort` intead of `usort`. Definition of `uasort` is
>
> Sort an array with a user-defined comparison function and maintain
> index association.
>
>
>
There is an example of code with your comparing function and uasort:
```
$list = array('post1' => 'Gold', 'post2' => 'None', 'post3' => 'Platinum');
function compareMedals( $a, $b ) {
$aMap = array(1 => 'Platinum', 2 => 'Gold', 3 => 'Silver', 4 => 'Bronze', 5 => 'Complete', 6 => 'None', 7 => 'Uncomplete');
$aValues = array( 1, 2, 3, 4, 5, 6, 7);
$a = str_ireplace($aMap, $aValues, $a);
$b = str_ireplace($aMap, $aValues, $b);
return $a - $b;
}
uasort($list, 'compareMedals');
print_r($list);
```
That code gives result
```
Array
(
[post3] => Platinum
[post1] => Gold
[post2] => None
)
``` | Considering these assumptions:
1. Your input array may contain values that are not unique (`Gold` may be the value for multiple posts).
2. You *know* (and can list) all of the potential values which will be used to sort the input array. (there will be no "outliers")
You can simplify your custom sort function by passing your "mapping array" (aka lookup array) as an associative array which has "status" as the keys and "sorting value" as values. I use `array_flip()` below, but you can write out the 1-dimensional associative array if you wish.
When calling `uasort()` to call the custom sorting function and preserve the input array's keys, use `use()` to pass the lookup array inside the function scope.
From php7, you can use the "spaceship operator" (aka three-way-comparison operator) to cleverly perform the comparison.
Clean, Brief, and Efficient.
Code: ([Demo](https://3v4l.org/Cr86T))
```
$array = ["Post1" => "Platinum", "Post2" => "Bronze", "Post3" => "Gold", "Post4" => "Uncomplete", "Post5" => "Gold"];
$order = array_flip(["Platinum", "Gold", "Silver", "Bronze", "Complete", "None", "Uncomplete"]);
// makes: array ('Platinum' => 0, 'Gold' => 1, 'Silver' => 2, 'Bronze' => 3, 'Complete' => 4, 'None' => 5, 'Uncomplete' => 6)
uasort($array, function ($a, $b) use ($order) {
return $order[$a] <=> $order[$b];
});
var_export($array);
```
Output:
```
array (
'Post1' => 'Platinum',
'Post3' => 'Gold',
'Post5' => 'Gold',
'Post2' => 'Bronze',
'Post4' => 'Uncomplete',
)
```
---
From PHP7.4, you can use arrow syntax to omit the `use()` declaration and shorten the total syntax.
[PHP7.4+ Demo](https://3v4l.org/BJNaY)
```
uasort($array, fn($a, $b) => $order[$a] <=> $order[$b]);
``` |
29,268,013 | I am having MAJOR usort() issues! :( So basically I want to sort my array by their values. I would like the values to display in this order: Platinum, Gold, Silver, Bronze, Complete, None, Uncomplete. Now I can sort them well, but I would like to preserve their key (is that possible?). here is my code:
```
function compareMedals( $a, $b ) {
$aMap = array(1 => 'Platinum', 2 => 'Gold', 3 => 'Silver', 4 => 'Bronze', 5 => 'Complete', 6 => 'None', 7 => 'Uncomplete');
$aValues = array( 1, 2, 3, 4, 5, 6, 7);
$a = str_ireplace($aMap, $aValues, $a);
$b = str_ireplace($aMap, $aValues, $b);
return $a - $b;
}
usort($list, 'compareMedals');
```
So is it possible to sort them WHILE preserving their keys? Thank You! :)
**EDIT**
Array:
```
$array = array("post1" => 'Platinum', "Post2" => "Bronze, "Post3" = > Gold)
```
Should output:
```
"Post1" => 'Platinum',
"Post3" => 'Gold',
"Post2" => 'Bronze'
```
Yet it is outputting this:
```
"0" => 'Platinum',
"1" => 'Gold',
"2" => 'Bronze'
``` | 2015/03/25 | [
"https://Stackoverflow.com/questions/29268013",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/4492877/"
] | `usort` did not preserve the key, if you want to preserve key after sort then you should use `asort`. Hope this help you. | Considering these assumptions:
1. Your input array may contain values that are not unique (`Gold` may be the value for multiple posts).
2. You *know* (and can list) all of the potential values which will be used to sort the input array. (there will be no "outliers")
You can simplify your custom sort function by passing your "mapping array" (aka lookup array) as an associative array which has "status" as the keys and "sorting value" as values. I use `array_flip()` below, but you can write out the 1-dimensional associative array if you wish.
When calling `uasort()` to call the custom sorting function and preserve the input array's keys, use `use()` to pass the lookup array inside the function scope.
From php7, you can use the "spaceship operator" (aka three-way-comparison operator) to cleverly perform the comparison.
Clean, Brief, and Efficient.
Code: ([Demo](https://3v4l.org/Cr86T))
```
$array = ["Post1" => "Platinum", "Post2" => "Bronze", "Post3" => "Gold", "Post4" => "Uncomplete", "Post5" => "Gold"];
$order = array_flip(["Platinum", "Gold", "Silver", "Bronze", "Complete", "None", "Uncomplete"]);
// makes: array ('Platinum' => 0, 'Gold' => 1, 'Silver' => 2, 'Bronze' => 3, 'Complete' => 4, 'None' => 5, 'Uncomplete' => 6)
uasort($array, function ($a, $b) use ($order) {
return $order[$a] <=> $order[$b];
});
var_export($array);
```
Output:
```
array (
'Post1' => 'Platinum',
'Post3' => 'Gold',
'Post5' => 'Gold',
'Post2' => 'Bronze',
'Post4' => 'Uncomplete',
)
```
---
From PHP7.4, you can use arrow syntax to omit the `use()` declaration and shorten the total syntax.
[PHP7.4+ Demo](https://3v4l.org/BJNaY)
```
uasort($array, fn($a, $b) => $order[$a] <=> $order[$b]);
``` |
8,314,823 | I have the following Linq-to-SQL query. On line #5 I'm trying to get the number of records from my Packages table where the conditions listed in my Where statement are satisfied. I think everything is correct in this code except for line #5. What did I do wrong?
```
var Overage = from s in db.Subscriptions
join p in db.Packages on s.UserID equals p.UserID
where
s.SubscriptionType != "PayAsYouGo" &&
(s.CancelDate == null || s.CancelDate >= day) &&
s.StartDate <= day && p.DateReceived <= day &&
(p.DateShipped == null || p.DateShipped >= day)
let AverageBoxSize = (p.Height * p.Length * p.Width) / 1728
let ActiveBoxCount = p.Count()
select new
{
p,
AverageBoxSize,
ActiveBoxCount,
s.Boxes
};
```
The error message is "Unknown method Count() of Foo.Data.Package"
**EDIT Here's an example to accompany my question:**
Subscription Table:
```
UserID | Boxes
001 5
002 25
003 5
```
Boxes is the max number each user is permitted under his or her subscription
Packages Table
```
UserID | PackageID | Height | Length | Width
001 00001 10 10 10
001 00002 10 10 10
001 00003 20 10 10
003 00004 10 20 20
003 00005 10 10 10
```
Desired Query Result
```
UserID | Boxes | Box Count | Average Box Size
001 5 3 1,333
003 5 2 2,500
```
User 002 does not appear because the Where clause excludes that user | 2011/11/29 | [
"https://Stackoverflow.com/questions/8314823",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/549273/"
] | I prefer inheritance and events too :-) Try this:
```
class MyEntryElement : EntryElement {
public MyEntryElement (string c, string p, string v) : base (c, p, v)
{
MaxLength = -1;
}
public int MaxLength { get; set; }
static NSString cellKey = new NSString ("MyEntryElement");
protected override NSString CellKey {
get { return cellKey; }
}
protected override UITextField CreateTextField (RectangleF frame)
{
UITextField tf = base.CreateTextField (frame);
tf.ShouldChangeCharacters += delegate (UITextField textField, NSRange range, string replacementString) {
if (MaxLength == -1)
return true;
return textField.Text.Length + replacementString.Length - range.Length <= MaxLength;
};
return tf;
}
}
```
but also read Miguel's warning (edit to my post) here: [MonoTouch.Dialog: Setting Entry Alignment for EntryElement](https://stackoverflow.com/questions/7908991/monotouch-dialog-setting-entry-alignment-for-entryelement) | MonoTouch.Dialog does not have this feature baked in by default. Your best bet is to copy and paste the code for that element and rename it something like LimitedEntryElement. Then implement your own version of UITextField (something like LimitedTextField) which overrides the ShouldChangeCharacters characters method. And then in "LimitedEntryElement" change:
```
UITextField entry;
```
to something like:
```
LimitedTextField entry;
``` |
8,314,823 | I have the following Linq-to-SQL query. On line #5 I'm trying to get the number of records from my Packages table where the conditions listed in my Where statement are satisfied. I think everything is correct in this code except for line #5. What did I do wrong?
```
var Overage = from s in db.Subscriptions
join p in db.Packages on s.UserID equals p.UserID
where
s.SubscriptionType != "PayAsYouGo" &&
(s.CancelDate == null || s.CancelDate >= day) &&
s.StartDate <= day && p.DateReceived <= day &&
(p.DateShipped == null || p.DateShipped >= day)
let AverageBoxSize = (p.Height * p.Length * p.Width) / 1728
let ActiveBoxCount = p.Count()
select new
{
p,
AverageBoxSize,
ActiveBoxCount,
s.Boxes
};
```
The error message is "Unknown method Count() of Foo.Data.Package"
**EDIT Here's an example to accompany my question:**
Subscription Table:
```
UserID | Boxes
001 5
002 25
003 5
```
Boxes is the max number each user is permitted under his or her subscription
Packages Table
```
UserID | PackageID | Height | Length | Width
001 00001 10 10 10
001 00002 10 10 10
001 00003 20 10 10
003 00004 10 20 20
003 00005 10 10 10
```
Desired Query Result
```
UserID | Boxes | Box Count | Average Box Size
001 5 3 1,333
003 5 2 2,500
```
User 002 does not appear because the Where clause excludes that user | 2011/11/29 | [
"https://Stackoverflow.com/questions/8314823",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/549273/"
] | MonoTouch.Dialog does not have this feature baked in by default. Your best bet is to copy and paste the code for that element and rename it something like LimitedEntryElement. Then implement your own version of UITextField (something like LimitedTextField) which overrides the ShouldChangeCharacters characters method. And then in "LimitedEntryElement" change:
```
UITextField entry;
```
to something like:
```
LimitedTextField entry;
``` | I do this:
```
myTextView.ShouldChangeText += CheckTextViewLength;
```
And this method:
```
private bool CheckTextViewLength (UITextView textView, NSRange range, string text)
{
return textView.Text.Length + text.Length - range.Length <= MAX_LENGTH;
}
``` |
8,314,823 | I have the following Linq-to-SQL query. On line #5 I'm trying to get the number of records from my Packages table where the conditions listed in my Where statement are satisfied. I think everything is correct in this code except for line #5. What did I do wrong?
```
var Overage = from s in db.Subscriptions
join p in db.Packages on s.UserID equals p.UserID
where
s.SubscriptionType != "PayAsYouGo" &&
(s.CancelDate == null || s.CancelDate >= day) &&
s.StartDate <= day && p.DateReceived <= day &&
(p.DateShipped == null || p.DateShipped >= day)
let AverageBoxSize = (p.Height * p.Length * p.Width) / 1728
let ActiveBoxCount = p.Count()
select new
{
p,
AverageBoxSize,
ActiveBoxCount,
s.Boxes
};
```
The error message is "Unknown method Count() of Foo.Data.Package"
**EDIT Here's an example to accompany my question:**
Subscription Table:
```
UserID | Boxes
001 5
002 25
003 5
```
Boxes is the max number each user is permitted under his or her subscription
Packages Table
```
UserID | PackageID | Height | Length | Width
001 00001 10 10 10
001 00002 10 10 10
001 00003 20 10 10
003 00004 10 20 20
003 00005 10 10 10
```
Desired Query Result
```
UserID | Boxes | Box Count | Average Box Size
001 5 3 1,333
003 5 2 2,500
```
User 002 does not appear because the Where clause excludes that user | 2011/11/29 | [
"https://Stackoverflow.com/questions/8314823",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/549273/"
] | MonoTouch.Dialog does not have this feature baked in by default. Your best bet is to copy and paste the code for that element and rename it something like LimitedEntryElement. Then implement your own version of UITextField (something like LimitedTextField) which overrides the ShouldChangeCharacters characters method. And then in "LimitedEntryElement" change:
```
UITextField entry;
```
to something like:
```
LimitedTextField entry;
``` | I prefer like below because I just need to specify the number of characters for each case. In this sample I settled to 12 numbers.
```
this.edPhone.ShouldChangeCharacters = (UITextField t, NSRange range, string replacementText) => {
int newLength = t.Text.Length + replacementText.Length - range.Length;
return (newLength <= 12);
};
``` |
8,314,823 | I have the following Linq-to-SQL query. On line #5 I'm trying to get the number of records from my Packages table where the conditions listed in my Where statement are satisfied. I think everything is correct in this code except for line #5. What did I do wrong?
```
var Overage = from s in db.Subscriptions
join p in db.Packages on s.UserID equals p.UserID
where
s.SubscriptionType != "PayAsYouGo" &&
(s.CancelDate == null || s.CancelDate >= day) &&
s.StartDate <= day && p.DateReceived <= day &&
(p.DateShipped == null || p.DateShipped >= day)
let AverageBoxSize = (p.Height * p.Length * p.Width) / 1728
let ActiveBoxCount = p.Count()
select new
{
p,
AverageBoxSize,
ActiveBoxCount,
s.Boxes
};
```
The error message is "Unknown method Count() of Foo.Data.Package"
**EDIT Here's an example to accompany my question:**
Subscription Table:
```
UserID | Boxes
001 5
002 25
003 5
```
Boxes is the max number each user is permitted under his or her subscription
Packages Table
```
UserID | PackageID | Height | Length | Width
001 00001 10 10 10
001 00002 10 10 10
001 00003 20 10 10
003 00004 10 20 20
003 00005 10 10 10
```
Desired Query Result
```
UserID | Boxes | Box Count | Average Box Size
001 5 3 1,333
003 5 2 2,500
```
User 002 does not appear because the Where clause excludes that user | 2011/11/29 | [
"https://Stackoverflow.com/questions/8314823",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/549273/"
] | I prefer inheritance and events too :-) Try this:
```
class MyEntryElement : EntryElement {
public MyEntryElement (string c, string p, string v) : base (c, p, v)
{
MaxLength = -1;
}
public int MaxLength { get; set; }
static NSString cellKey = new NSString ("MyEntryElement");
protected override NSString CellKey {
get { return cellKey; }
}
protected override UITextField CreateTextField (RectangleF frame)
{
UITextField tf = base.CreateTextField (frame);
tf.ShouldChangeCharacters += delegate (UITextField textField, NSRange range, string replacementString) {
if (MaxLength == -1)
return true;
return textField.Text.Length + replacementString.Length - range.Length <= MaxLength;
};
return tf;
}
}
```
but also read Miguel's warning (edit to my post) here: [MonoTouch.Dialog: Setting Entry Alignment for EntryElement](https://stackoverflow.com/questions/7908991/monotouch-dialog-setting-entry-alignment-for-entryelement) | I do this:
```
myTextView.ShouldChangeText += CheckTextViewLength;
```
And this method:
```
private bool CheckTextViewLength (UITextView textView, NSRange range, string text)
{
return textView.Text.Length + text.Length - range.Length <= MAX_LENGTH;
}
``` |
8,314,823 | I have the following Linq-to-SQL query. On line #5 I'm trying to get the number of records from my Packages table where the conditions listed in my Where statement are satisfied. I think everything is correct in this code except for line #5. What did I do wrong?
```
var Overage = from s in db.Subscriptions
join p in db.Packages on s.UserID equals p.UserID
where
s.SubscriptionType != "PayAsYouGo" &&
(s.CancelDate == null || s.CancelDate >= day) &&
s.StartDate <= day && p.DateReceived <= day &&
(p.DateShipped == null || p.DateShipped >= day)
let AverageBoxSize = (p.Height * p.Length * p.Width) / 1728
let ActiveBoxCount = p.Count()
select new
{
p,
AverageBoxSize,
ActiveBoxCount,
s.Boxes
};
```
The error message is "Unknown method Count() of Foo.Data.Package"
**EDIT Here's an example to accompany my question:**
Subscription Table:
```
UserID | Boxes
001 5
002 25
003 5
```
Boxes is the max number each user is permitted under his or her subscription
Packages Table
```
UserID | PackageID | Height | Length | Width
001 00001 10 10 10
001 00002 10 10 10
001 00003 20 10 10
003 00004 10 20 20
003 00005 10 10 10
```
Desired Query Result
```
UserID | Boxes | Box Count | Average Box Size
001 5 3 1,333
003 5 2 2,500
```
User 002 does not appear because the Where clause excludes that user | 2011/11/29 | [
"https://Stackoverflow.com/questions/8314823",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/549273/"
] | I prefer inheritance and events too :-) Try this:
```
class MyEntryElement : EntryElement {
public MyEntryElement (string c, string p, string v) : base (c, p, v)
{
MaxLength = -1;
}
public int MaxLength { get; set; }
static NSString cellKey = new NSString ("MyEntryElement");
protected override NSString CellKey {
get { return cellKey; }
}
protected override UITextField CreateTextField (RectangleF frame)
{
UITextField tf = base.CreateTextField (frame);
tf.ShouldChangeCharacters += delegate (UITextField textField, NSRange range, string replacementString) {
if (MaxLength == -1)
return true;
return textField.Text.Length + replacementString.Length - range.Length <= MaxLength;
};
return tf;
}
}
```
but also read Miguel's warning (edit to my post) here: [MonoTouch.Dialog: Setting Entry Alignment for EntryElement](https://stackoverflow.com/questions/7908991/monotouch-dialog-setting-entry-alignment-for-entryelement) | I prefer like below because I just need to specify the number of characters for each case. In this sample I settled to 12 numbers.
```
this.edPhone.ShouldChangeCharacters = (UITextField t, NSRange range, string replacementText) => {
int newLength = t.Text.Length + replacementText.Length - range.Length;
return (newLength <= 12);
};
``` |
46,341,399 | I have a web application that uses Apache Wicket. After the submitting of a form, I need to intercept the browser's back button, in order to redirect to the initial page, or to a expired page. How can I implement this? I try with
```
@Override
protected void setHeaders(WebResponse response) {
response.setHeader("Pragma", "no-cache");
response.setHeader("Cache-Control", "no-cache, max-age=0, must-revalidate, no-store");
}
```
but it doesn't work. | 2017/09/21 | [
"https://Stackoverflow.com/questions/46341399",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/7465987/"
] | Interesting question!
In the screenshot you've provided, the **Name** column is cut off, so I can't tell what resource is still being served from disk cache. I'll assume that it's a service worker script, based on the description in your "EDIT".
The question I'll answer, then, is "how does the browser cache service worker (SW) scripts?"
1. When a SW gets registered, the browser stores the SW script in a separate database in the disk cache. I'll just call this the *SW database*, but note this isn't an official term. Note that if the service worker calls `importScripts()`, those scripts are also stored in the SW database. Also note that when a service worker script gets updated, the browser overwrites the currently-stored script in the SW database with the new script. This is the [Chrome implementation](https://cs.chromium.org/chromium/src/content/browser/service_worker/service_worker_database.h?q=serviceworker+version+database&sq=package:chromium&dr=CSs&l=5), other browsers may do it differently. 1
2. Every time you load the page, the browser makes an invisible request (i.e. you can't see this in DevTools) to see if there are any updates to the service worker script. IMO, DevTools should expose this request, so that developers get a better idea of the SW lifecycle.
* If one byte of the script is different, then the browser updates the SW script in the SW database.
* If the SW script hasn't changed, the browser just serves the script from the SW database. *This* is the request that you're seeing in DevTools. IMO it's misleading that DevTools describes this request as `(from disk cache)`. Ideally, it should have some other name to indicate that this cache isn't affected by the **Disable Cache** checkbox.
So, in this case, you're right: the **Disable cache** checkbox does nothing. If you want to ensure that your cache is completely cleared (including service worker stuff):
1. Go to the [**Clear Storage** pane](https://developers.google.com/web/tools/chrome-devtools/manage-data/local-storage#clear-storage), make sure that all the checkboxes are enabled, and then click **Clear Site Data**.
2. While DevTools is still open, long-press Chrome's **Reload** button, and select **Empty Cache and Hard Reload**. See <https://stackoverflow.com/a/14969509/1669860> for an explanation of these different options.
1 I got this info from Alex Russell, Chrome engineer and co-author of the service worker spec | In addition to the disable cache option, on the network pane of the developer tools you can now right click and choose "Clear Cache" from the popup menu.
Also, you can use this plugin if you need to clear the cache frequently:
<https://chrome.google.com/webstore/detail/jpfbieopdmepaolggioebjmedmclkbap> |
22,800,104 | Is it possible to extract properties of a `HTML tag` using Javascript.
For example, I want to know the values present inside with the `<div>` which has `align = "center"`.
```
<div align="center">Hello</div>
```
What I know is:
```
var division=document.querySelectorAll("div");
```
but it selects the elements between `<div> & </div>` and not the `properties` inside it.
I want to use this in the **Greasemonkey script** where I can check for some **malicious properties of a tag** in a website using `Javascript`.
Hope I'm clear..!! | 2014/04/02 | [
"https://Stackoverflow.com/questions/22800104",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/2045807/"
] | You are looking for the [getAttribute](https://developer.mozilla.org/en-US/docs/Web/API/Element.getAttribute) function. Which is accessible though the element.
You would use it like this.
```
var division = document.querySelectorAll('div')
for(var i=0,length=division.length;i < length;i++)
{
var element = division[i];
var alignData = division.getAttribute('align'); //alignData = center
if(alignData === 'center')
{
console.log('Data Found!');
}
}
```
If you're looking to see what attributes are available on the element, these are available though
```
division.attributes
```
[MDN Attributes](https://developer.mozilla.org/en-US/docs/Web/API/Node.attributes)
So for instance in your example if you wanted to see if an align property was available you could write this.
```
//Test to see if attribute exists on element
if(division.attributes.hasOwnProperty('align'))
{
//It does!
}
``` | ```
var test = document.querySelectorAll('div[align="center"]');
``` |
55,911,955 | I try:
```
public interface I { abstract void F(); }
```
I get:
>
> The modifier 'abstract' is not valid for this item in C# 7.3. Please
> use language version 'preview' or greater.
>
>
>
However I can find no mention of this feature ie in <https://learn.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-8>
Where can I find the docs for that ? or is the message wrong here ? | 2019/04/29 | [
"https://Stackoverflow.com/questions/55911955",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/460084/"
] | C# 8.0 will allow modifiers and default implementations for interface members. You can see discussion [here](https://github.com/dotnet/csharplang/issues/288) and details [here](https://github.com/dotnet/csharplang/blob/master/proposals/default-interface-methods.md)
However, the `abstract` modifier in an interface method makes zero sense IMO, but it might be available in the C# 8, since other modifiers will be valid as well.
You can see the `abstract` is listed in the [allowed modifiers](https://github.com/dotnet/csharplang/blob/master/proposals/default-interface-methods.md#modifiers-in-interfaces)
>
> The syntax for an interface is relaxed to permit modifiers on its members. The following are permitted: private, protected, internal, public, virtual, **abstract**, sealed, static, extern, and partial.
>
>
> | Like the other answer it is legal from c#8.0.
But is there any benefit of having abstract methods in interface??
With recent improvements in the language, `abstract` function in interface can be considered as something which will not have default implementation.
Now the C# interfaces can have default implementation for interface functions. Look at the below example. It is totally fine and the output is "Default implemented example function".
```
//AN INTERFACE WITH DEFUALT METHOD
interface I
{
string Example()
{
return "Default implemented example function";
}
}
//CLASS IMPLEMENTING THE INTERFACE
class C : I
{
}
//AN EXAMPLE CLASS ACCESSING THE DEFAULT IMPLEMENTED example FUNCTION.
public class Test
{
public static void Main(string[] args)
{
I i = new C();
Console.WriteLine (i.Example());
}
}
```
In the above example lets suppose try adding `abstract` for the "Example()" function in Interface.
The code **will not** compile saying "'I.Example()' cannot declare a body because it is marked abstract"
So when we use `abstract` the obvious way is to define the function in the class (implements interface) for any usage(shown below).
```
//AN INTERFACE WITH ABSTRACT METHOD
interface I
{
abstract string Example();
}
//CLASS IMPLEMENTING THE INTERFACE AND GIVE A BODY FOR EXAMPLE FUNCTION
class C : I
{
public string Example()
{
return "Implemented example function";
}
}
//A CLASS ACCESSING THE CLASS METHOD EXAMPLE.
public class Test
{
public static void Main(string[] args)
{
I i = new C();
Console.WriteLine (i.Example());
}
}
```
In summary declaring the function in interface as `abstract`, there can not be a default body for the function in interface, instead the class implements the interface must have a body for it. |
8,706,597 | I have a nice default-value check going and client wants to add additional functionality to the `onBlur` event. The default-value check is global and works fine. The new functionality requires some field-specific values be passed to the new function. If it weren't for this, I'd just tack it onto the default-check and be done.
My question is can I do this sort of thing and have them both fire? What would be a better way?
THE DEFAULT-CHECK
```
$(document.body).getElements('input[type=text],textarea,tel,email').addEvents ({
'focus' : function(){
if (this.get('value') == this.defaultValue)
{
this.set('value', '');
}
},
'blur' : function(){
if (this.get('value') == '')
{
this.set('value', (this.defaultValue));
}
}
});
```
ADDED FUNCTIONALITY
`<input type='text' id='field_01' value='default data' onBlur='driveData(event, variableForThisField, this.value);'>`
The idea is to handle default values as usual, but fire the new function when the field's values are entered. Seems to me one has to fire first, but how?
Again, because the values passed a *field* specific, I can't just dump it into the global `default-check` function.
I hope this makes sense. | 2012/01/03 | [
"https://Stackoverflow.com/questions/8706597",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/901426/"
] | Just store the custom variable in a [custom data attribute](http://ejohn.org/blog/html-5-data-attributes/). Not technically standards-compliant [in HTML 4], but it works:
```
<input type='text' id='field_01' value='default data' data-customvar="variableForThisField">
$(document.body).getElements('input[type=text],textarea,tel,email').addEvents ({
'focus' : function(){
if (this.get('value') == this.defaultValue)
{
this.set('value', '');
}
},
'blur' : function(){
if (this.get('value') == '')
{
this.set('value', (this.defaultValue));
} else {
driveData(this.get('value'), this.get('data-customvar'));
}
}
});
```
fiddle: <http://jsfiddle.net/QkcxP/6/> | I think you're using Mootools? I don't quite recognize the syntax, but I created a JSFiddle and it seems to work with Mootools, and not other libraries.
Here's the fiddle I created to test it: <http://jsfiddle.net/NDTsz/>
Answer would appear to be **yes** - certainly in Chrome, but I believe in every browser. |
8,405,711 | I would like to load an image previously loaded using GDI+ into Direct X; is it possible? I know that I can save the image to disk and then load it using:
```
D3DXLoadSurfaceFromFile
```
But I would like to use
```
D3DXLoadSurfaceFromMemory
```
with the GDI+ image loaded in memory; the GDI+ image is a *GdiPlus*::Image type.
I'm using Visual C++ 2010.
Thanks in advance.
**Update:**
```
using namespace Gdiplus;
std::string decodedImage = base64_decode(Base64EncodedImage);
DWORD imageSize = decodedImage.length();
HGLOBAL hMem = ::GlobalAlloc(GMEM_MOVEABLE, imageSize);
LPVOID pImage = ::GlobalLock(hMem);
memcpy(pImage, decodedImage.c_str(), imageSize);
IStream* pStream = NULL;
::CreateStreamOnHGlobal(hMem, FALSE, &pStream);
Image image(pStream);
```
The above pice of code let me transform an image encoded in base64 (**Base64EncodedImage**) to a GDI+ image; so far so good, next I convert the image as a byte array (**buffer**):
```
int stride = 4 * ((image.GetWidth() + 3) / 4);
size_t safeSize =
stride * image.GetHeight() * 4 + sizeof(BITMAPINFOHEADER) +
sizeof(BITMAPFILEHEADER) + 256 * sizeof(RGBQUAD);
HGLOBAL mem = GlobalAlloc(GHND, safeSize);
LARGE_INTEGER seekPos = {0};
ULARGE_INTEGER imageSizeEx;
HRESULT hr = pStream->Seek(seekPos, STREAM_SEEK_CUR, &imageSizeEx);
BYTE* buffer = new BYTE[imageSizeEx.LowPart];
hr = pStream->Seek(seekPos, STREAM_SEEK_SET, 0);
hr = pStream->Read(buffer, imageSizeEx.LowPart, 0);
```
As a side note, I can save the byte array to disk as a png image with no loss, and then load it using **D3DXLoadSurfaceFromFile**.
Next I create and load the surface:
```
hr = d3ddevex->CreateOffscreenPlainSurface(image.GetWidth(), image.GetHeight(), D3DFMT_X8R8G8B8, D3DPOOL_SYSTEMMEM, &surf, NULL);
RECT srcRect;
srcRect.left = 0;
srcRect.top = 0;
srcRect.bottom = image.GetWidth();
srcRect.right = image.GetHeight();
hr = D3DXLoadSurfaceFromMemory(surf, NULL, NULL, buffer, D3DFMT_X8R8G8B8,image.GetWidth(), NULL, &srcRect,D3DX_FILTER_NONE,0);
```
This IS working, BUT the image appears all disordered, colored pixels everywhere but not a "readable" image at all (like if it were a test pattern from an arcade game). | 2011/12/06 | [
"https://Stackoverflow.com/questions/8405711",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/1007264/"
] | The problem is that WebBrowser has airspace concerns. You can't overlay content on top of a WebBrowser control.
For details, see the [WPF Interop page on Airspace](http://msdn.microsoft.com/en-us/library/aa970688%28v=vs.85%29.aspx). | Actually, you can add any content on top of a web browser. You need to place the content inside a Popup inside its own Canvas, like this:
```
<Canvas ClipToBounds="False">
<Popup AllowsTransparency="True" ClipToBounds="False" IsOpen="True">
<Rectangle x:Name="YourContent"/>
<Popup>
</Canvas>
```
You may replace the Rectagle with any control, it will be displayed on top of the browser and even outside the parent window.
Here's a screenshot illustrating this, in this case what overlaps the webbrowser is a listbox with a special style to make it look like a menu popup:
 |
30,265,728 | I have eliminated labels on the y axis because only the relative amount is really important.
```
w <- c(34170,24911,20323,14290,9605,7803,7113,6031,5140,4469)
plot(1:length(w), w, type="b", xlab="Number of clusters",
ylab="Within-cluster variance",
main="K=5 eliminates most of the within-cluster variance",
cex.main=1.5,
cex.lab=1.2,
font.main=20,
yaxt='n',lab=c(length(w),5,7), # no ticks on y axis, all ticks on x
family="Calibri Light")
```
However, suppressing those tick labels leaves a lot of white space between the y axis label ("Within-cluster variance") and the y axis. Is there a way to nudge it back over? If I somehow set the (invisible) tick labels to go *inside* the axis, would the axis label settles along the axis? | 2015/05/15 | [
"https://Stackoverflow.com/questions/30265728",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/2573061/"
] | Try setting `ylab=""` in your `plot` call and use `title` to set the label of the y-axis manually. Using `line` you could adjust the position of the label, e.g.:
```
plot(1:length(w), w, type="b", xlab="Number of clusters", ylab="",
main="K=5 eliminates most of the within-cluster variance",
cex.main=1.5,
cex.lab=1.2,
font.main=20,
yaxt='n',lab=c(length(w),5,7), # no ticks on y axis, all ticks on x
family="Calibri Light")
title(ylab="Within-cluster variance", line=0, cex.lab=1.2, family="Calibri Light")
```
Please read `?title` for more details. | Adjust `mgp`, see `?par`
```
title(ylab="Within-cluster variance", mgp=c(1,1,0), family="Calibri Light",cex.lab=1.2)
```
 |
67,868,509 | When the user typing a text in Textformfield, **onChanged** callback is triggered per character and **onFieldSubmitted** callback is triggered if the user presses enter button after finish the typing. But, I want different behavior than onChanged and onFieldSubmitted.
(What I mean by **outside** in the following is background or any other UI element)
Does anyone know a way to identify when the user touches **outside** of the Textformfield after finish typing?
What I am asking is very similar to the behavior of the onFieldSubmitted. ***But without pressing the enter button***.
Thank you! | 2021/06/07 | [
"https://Stackoverflow.com/questions/67868509",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/12306259/"
] | As described on Media.Plugin:
>
> Xamarin.Essentials 1.6 introduced official support for picking/taking
> [photos and videos](https://learn.microsoft.com/xamarin/essentials/media-picker?WT.mc_id=friends-0000-jamont) with the new Media Picker API.
>
>
> | According to your description, if you want to limit selected photos numbers, I suggest you can check the numbers in OnActivityResult. I do one sample that you can take a look:
Firstly, create interface for the dependency service to open the gallery in .net standard project.
```
public interface IMediaService
{
Task OpenGallery();
}
```
Secondly, in the Android project, I created a service to handle the photo gallery opening, also I’m using the Permission plugin for check and request permissions in Android 6 and higher.
```
[assembly: Xamarin.Forms.Dependency(typeof(MediaService))]
namespace pickerimage.Droid
{
public class MediaService : Java.Lang.Object, IMediaService
{
public async Task OpenGallery()
{
try
{
var status = await CrossPermissions.Current.CheckPermissionStatusAsync(Plugin.Permissions.Abstractions.Permission.Storage);
if (status != PermissionStatus.Granted)
{
if (await CrossPermissions.Current.ShouldShowRequestPermissionRationaleAsync(Plugin.Permissions.Abstractions.Permission.Storage))
{
Toast.MakeText(Xamarin.Forms.Forms.Context, "Need Storage permission to access to your photos.", ToastLength.Long).Show();
}
var results = await CrossPermissions.Current.RequestPermissionsAsync(new[] { Plugin.Permissions.Abstractions.Permission.Storage });
status = results[Plugin.Permissions.Abstractions.Permission.Storage];
}
if (status == PermissionStatus.Granted)
{
Toast.MakeText(Xamarin.Forms.Forms.Context, "Select max 20 images", ToastLength.Long).Show();
var imageIntent = new Intent(
Intent.ActionPick);
imageIntent.SetType("image/*");
imageIntent.PutExtra(Intent.ExtraAllowMultiple, true);
imageIntent.SetAction(Intent.ActionGetContent);
((Activity)Forms.Context).StartActivityForResult(
Intent.CreateChooser(imageIntent, "Select photo"), 1);
}
else if (status != PermissionStatus.Unknown)
{
Toast.MakeText(Xamarin.Forms.Forms.Context, "Permission Denied. Can not continue, try again.", ToastLength.Long).Show();
}
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
Toast.MakeText(Xamarin.Forms.Forms.Context, "Error. Can not continue, try again.", ToastLength.Long).Show();
}
}
}
}
public static class ImageHelpers
{
public static string SaveFile(string collectionName, byte[] imageByte, string fileName)
{
var fileDir = new Java.IO.File(Android.OS.Environment.GetExternalStoragePublicDirectory(Android.OS.Environment.DirectoryPictures), collectionName);
if (!fileDir.Exists())
{
fileDir.Mkdirs();
}
var file = new Java.IO.File(fileDir, fileName);
System.IO.File.WriteAllBytes(file.Path, imageByte);
return file.Path;
}
public static byte[] RotateImage(string path)
{
byte[] imageBytes;
var originalImage = BitmapFactory.DecodeFile(path);
var rotation = GetRotation(path);
var width = (originalImage.Width * 0.25);
var height = (originalImage.Height * 0.25);
var scaledImage = Bitmap.CreateScaledBitmap(originalImage, (int)width, (int)height, true);
Bitmap rotatedImage = scaledImage;
if (rotation != 0)
{
var matrix = new Matrix();
matrix.PostRotate(rotation);
rotatedImage = Bitmap.CreateBitmap(scaledImage, 0, 0, scaledImage.Width, scaledImage.Height, matrix, true);
scaledImage.Recycle();
scaledImage.Dispose();
}
using (var ms = new MemoryStream())
{
rotatedImage.Compress(Bitmap.CompressFormat.Jpeg, 90, ms);
imageBytes = ms.ToArray();
}
originalImage.Recycle();
rotatedImage.Recycle();
originalImage.Dispose();
rotatedImage.Dispose();
GC.Collect();
return imageBytes;
}
private static int GetRotation(string filePath)
{
using (var ei = new ExifInterface(filePath))
{
var orientation = (Android.Media.Orientation)ei.GetAttributeInt(ExifInterface.TagOrientation, (int)Android.Media.Orientation.Normal);
switch (orientation)
{
case Android.Media.Orientation.Rotate90:
return 90;
case Android.Media.Orientation.Rotate180:
return 180;
case Android.Media.Orientation.Rotate270:
return 270;
default:
return 0;
}
}
}
}
}
```
Finally, in MainActivity.cs, check `clipData.ItemCount` count, if count is greather than 20, return.
```
protected override void OnActivityResult(int requestCode, Result resultCode, Intent data)
{
base.OnActivityResult(requestCode, resultCode, data);
if (requestCode == 1 && resultCode == Result.Ok)
{
List<string> images = new List<string>();
if (data != null)
{
ClipData clipData = data.ClipData;
if (clipData != null)
{
if(clipData.ItemCount>20)
{
Toast.MakeText(Xamarin.Forms.Forms.Context, "please select max 20 images", ToastLength.Long).Show();
return;
}
for (int i = 0; i < clipData.ItemCount; i++)
{
ClipData.Item item = clipData.GetItemAt(i);
Android.Net.Uri uri = item.Uri;
var path = GetRealPathFromURI(uri);
if (path != null)
{
//Rotate Image
var imageRotated = ImageHelpers.RotateImage(path);
var newPath = ImageHelpers.SaveFile("TmpPictures", imageRotated, System.DateTime.Now.ToString("yyyyMMddHHmmssfff"));
images.Add(newPath);
}
}
}
else
{
Android.Net.Uri uri = data.Data;
var path = GetRealPathFromURI(uri);
if (path != null)
{
//Rotate Image
var imageRotated = ImageHelpers.RotateImage(path);
var newPath = ImageHelpers.SaveFile("TmpPictures", imageRotated, System.DateTime.Now.ToString("yyyyMMddHHmmssfff"));
images.Add(newPath);
}
}
MessagingCenter.Send<App, List<string>>((App)Xamarin.Forms.Application.Current, "ImagesSelected", images);
}
}
}
public String GetRealPathFromURI(Android.Net.Uri contentURI)
{
try
{
ICursor imageCursor = null;
string fullPathToImage = "";
imageCursor = ContentResolver.Query(contentURI, null, null, null, null);
imageCursor.MoveToFirst();
int idx = imageCursor.GetColumnIndex(MediaStore.Images.ImageColumns.Data);
if (idx != -1)
{
fullPathToImage = imageCursor.GetString(idx);
}
else
{
ICursor cursor = null;
var docID = DocumentsContract.GetDocumentId(contentURI);
var id = docID.Split(':')[1];
var whereSelect = MediaStore.Images.ImageColumns.Id + "=?";
var projections = new string[] { MediaStore.Images.ImageColumns.Data };
cursor = ContentResolver.Query(MediaStore.Images.Media.InternalContentUri, projections, whereSelect, new string[] { id }, null);
if (cursor.Count == 0)
{
cursor = ContentResolver.Query(MediaStore.Images.Media.ExternalContentUri, projections, whereSelect, new string[] { id }, null);
}
var colData = cursor.GetColumnIndexOrThrow(MediaStore.Images.ImageColumns.Data);
cursor.MoveToFirst();
fullPathToImage = cursor.GetString(colData);
}
return fullPathToImage;
}
catch (Exception ex)
{
Toast.MakeText(Xamarin.Forms.Forms.Context, "Unable to get path", ToastLength.Long).Show();
}
return null;
}
}
```
Display image in MainPage.
```
<StackLayout>
<Button
BackgroundColor="Blue"
Clicked="Handle_Clicked"
Text="Select From Gallery"
TextColor="White" />
<ListView x:Name="listItems">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<StackLayout Orientation="Horizontal">
<Image HeightRequest="100" Source="{Binding .}" />
</StackLayout>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</StackLayout>
public partial class MainPage : ContentPage
{
List<string> _images = new List<string>();
public MainPage()
{
InitializeComponent();
}
protected override void OnAppearing()
{
base.OnAppearing();
MessagingCenter.Subscribe<App, List<string>>((App)Xamarin.Forms.Application.Current, "ImagesSelected", (s, images) =>
{
listItems.ItemsSource = images;
_images = images;
});
}
protected override void OnDisappearing()
{
base.OnDisappearing();
MessagingCenter.Unsubscribe<App, List<string>>(this, "ImagesSelected");
}
async void Handle_Clicked(object sender, System.EventArgs e)
{
await DependencyService.Get<IMediaService>().OpenGallery();
}
}
``` |
563,340 | ```
\documentclass{article}
\usepackage{amsmath}
\usepackage{array}
\usepackage{mathtools}
\begin{document}
\renewcommand{\arraystretch}{1.2}
\newcommand{\minus}{\scalebox{0.4}[1.0]{$-$}}
\[
\begin{bmatrix*}[r]
0& \minus\frac{1}{2} &\frac{1}{2} \\
\minus\frac{1}{2}& 0&\minus\frac{1}{2}\\
\frac{1}{2}& \minus\frac{1}{2}&0
\end{bmatrix*}
\]
\end{document}
```
[](https://i.stack.imgur.com/1yvlc.png)
How to reduce the number “0” size to fit fraction "1/2"? (reduce height of "0" ?)
---
update sample
As below photo shows the proportion close to 1/3
[](https://i.stack.imgur.com/Ofr0I.jpg) | 2020/09/19 | [
"https://tex.stackexchange.com/questions/563340",
"https://tex.stackexchange.com",
"https://tex.stackexchange.com/users/221248/"
] | I wouldn't reduce the size of the `0` numerals. If you believe that they look too big in relation to the text-style `\frac{1}{2}` expressions, maybe what's *really* needed is to replace the `\frac` terms with their decimal representations -- of course while aligning the numbers on their (explicit or implicit decimal markers.
[](https://i.stack.imgur.com/K0r1B.png)
```none
\documentclass{article}
\usepackage{mathtools} % for 'bmatrix*' env.
\usepackage{siunitx} % for 'S' column type
\begin{document}
\[
\renewcommand\arraystretch{1.33}
\begin{bmatrix*}[r]
0 & -\frac{1}{2} & \frac{1}{2} \\
-\frac{1}{2} & 0 & -\frac{1}{2} \\
\frac{1}{2} & -\frac{1}{2} & 0
\end{bmatrix*}
\]
\[
\left[ % note: no need to increase the value of '\arraystretch'
\begin{array}{@{} *{3}{S[table-format=-1.1]} @{}}
0 & -0.5 & 0.5 \\
-0.5 & 0 & -0.5\\
0.5 & -0.5 & 0
\end{array}
\right]
\]
\end{document}
``` | I would say that your sample actually suggests the opposite: "I want to preserve regular size even for numerators and denominators". Use `\dfrac` instead of `\frac`.
Also, why do you have special treatment for minus? Why the `-` isn't enough?
```
\documentclass{article}
\usepackage{amsmath}
\usepackage{array}
\usepackage{mathtools}
\begin{document}
\renewcommand{\arraystretch}{2}
\[
\begin{bmatrix*}[r]
0 & -\dfrac{1}{2} & \dfrac{1}{2} \\
-\dfrac{1}{2} & 0 & -\dfrac{1}{2} \\
\dfrac{1}{2} & -\dfrac{1}{2} & 0
\end{bmatrix*}
\]
\end{document}
```
[](https://i.stack.imgur.com/QLU1E.png) |
563,340 | ```
\documentclass{article}
\usepackage{amsmath}
\usepackage{array}
\usepackage{mathtools}
\begin{document}
\renewcommand{\arraystretch}{1.2}
\newcommand{\minus}{\scalebox{0.4}[1.0]{$-$}}
\[
\begin{bmatrix*}[r]
0& \minus\frac{1}{2} &\frac{1}{2} \\
\minus\frac{1}{2}& 0&\minus\frac{1}{2}\\
\frac{1}{2}& \minus\frac{1}{2}&0
\end{bmatrix*}
\]
\end{document}
```
[](https://i.stack.imgur.com/1yvlc.png)
How to reduce the number “0” size to fit fraction "1/2"? (reduce height of "0" ?)
---
update sample
As below photo shows the proportion close to 1/3
[](https://i.stack.imgur.com/Ofr0I.jpg) | 2020/09/19 | [
"https://tex.stackexchange.com/questions/563340",
"https://tex.stackexchange.com",
"https://tex.stackexchange.com/users/221248/"
] | I would second Mico's recommendation to not do this. But the solution would be to make the fractions display style rather than shrink the zeros (your example was likely set by naïve software which doesn't know how to properly resize fractions. Here's another alternative setting adapted from your MWE:
```
\documentclass{article}
\usepackage{amsmath}
\usepackage{array}
\usepackage{mathtools}
\begin{document}
\newcommand{\half}{{\displaystyle\frac{1}{2}\vphantom{\frac{1}{2}^1_1}}}
\[
\begin{bmatrix*}[r]
0& -\half &\half \\
-\half& 0&-\half\\
\half& -\half&0
\end{bmatrix*}
\]
\end{document}
```
[](https://i.stack.imgur.com/XkbLi.png)
I put the fraction in `\displaystyle` and used a `\vphantom` to add extra spacing—perhaps not enough—above and below the fractions. | I would say that your sample actually suggests the opposite: "I want to preserve regular size even for numerators and denominators". Use `\dfrac` instead of `\frac`.
Also, why do you have special treatment for minus? Why the `-` isn't enough?
```
\documentclass{article}
\usepackage{amsmath}
\usepackage{array}
\usepackage{mathtools}
\begin{document}
\renewcommand{\arraystretch}{2}
\[
\begin{bmatrix*}[r]
0 & -\dfrac{1}{2} & \dfrac{1}{2} \\
-\dfrac{1}{2} & 0 & -\dfrac{1}{2} \\
\dfrac{1}{2} & -\dfrac{1}{2} & 0
\end{bmatrix*}
\]
\end{document}
```
[](https://i.stack.imgur.com/QLU1E.png) |
563,340 | ```
\documentclass{article}
\usepackage{amsmath}
\usepackage{array}
\usepackage{mathtools}
\begin{document}
\renewcommand{\arraystretch}{1.2}
\newcommand{\minus}{\scalebox{0.4}[1.0]{$-$}}
\[
\begin{bmatrix*}[r]
0& \minus\frac{1}{2} &\frac{1}{2} \\
\minus\frac{1}{2}& 0&\minus\frac{1}{2}\\
\frac{1}{2}& \minus\frac{1}{2}&0
\end{bmatrix*}
\]
\end{document}
```
[](https://i.stack.imgur.com/1yvlc.png)
How to reduce the number “0” size to fit fraction "1/2"? (reduce height of "0" ?)
---
update sample
As below photo shows the proportion close to 1/3
[](https://i.stack.imgur.com/Ofr0I.jpg) | 2020/09/19 | [
"https://tex.stackexchange.com/questions/563340",
"https://tex.stackexchange.com",
"https://tex.stackexchange.com/users/221248/"
] | The image which the OP posted looks like display style fractions `\dfrac` were used. As stated in my comment, shrinking the `0` in these situations is uncommon. Generally speaking, the various `Tex` engines and most trusted and well used packages have good typographic features by default.
```
\documentclass{article}
\usepackage{amsmath}
\usepackage{array}
\usepackage{mathtools,xfrac}
\begin{document}
\renewcommand{\arraystretch}{1.2}
\newcommand{\minus}{\scalebox{0.4}[1.0]{$-$}}
\[
\begin{bmatrix*}[r]
0& \minus\frac{1}{2} &\frac{1}{2} \\
\minus\frac{1}{2}& 0&\minus\frac{1}{2}\\
\frac{1}{2}& \minus\frac{1}{2}&0
\end{bmatrix*}
\]
\[
\renewcommand{\arraystretch}{2.0}%You will see what happens if you do not use it. It is a local definition which does not affect the third matrix
\begin{bmatrix*}[r]
0& -\dfrac{1}{2} &\dfrac{1}{2} \\
-\dfrac{1}{2}& 0&-\dfrac{1}{2}\\
\dfrac{1}{2}& -\dfrac{1}{2}&0
\end{bmatrix*}
\]
\[
\begin{bmatrix*}[r]
0& \sfrac{-1}{2} &\sfrac{1}{2} \\
\sfrac{-1}{2}& 0&\sfrac{-1}{2}\\
\sfrac{1}{2}& \sfrac{-1}{2}&0
\end{bmatrix*}
\]
\end{document}
```
Top: original; middle: `\dfrac`; bottom: <https://ctan.org/pkg/xfrac>.
[](https://i.stack.imgur.com/cR3SI.png) | I would say that your sample actually suggests the opposite: "I want to preserve regular size even for numerators and denominators". Use `\dfrac` instead of `\frac`.
Also, why do you have special treatment for minus? Why the `-` isn't enough?
```
\documentclass{article}
\usepackage{amsmath}
\usepackage{array}
\usepackage{mathtools}
\begin{document}
\renewcommand{\arraystretch}{2}
\[
\begin{bmatrix*}[r]
0 & -\dfrac{1}{2} & \dfrac{1}{2} \\
-\dfrac{1}{2} & 0 & -\dfrac{1}{2} \\
\dfrac{1}{2} & -\dfrac{1}{2} & 0
\end{bmatrix*}
\]
\end{document}
```
[](https://i.stack.imgur.com/QLU1E.png) |
563,340 | ```
\documentclass{article}
\usepackage{amsmath}
\usepackage{array}
\usepackage{mathtools}
\begin{document}
\renewcommand{\arraystretch}{1.2}
\newcommand{\minus}{\scalebox{0.4}[1.0]{$-$}}
\[
\begin{bmatrix*}[r]
0& \minus\frac{1}{2} &\frac{1}{2} \\
\minus\frac{1}{2}& 0&\minus\frac{1}{2}\\
\frac{1}{2}& \minus\frac{1}{2}&0
\end{bmatrix*}
\]
\end{document}
```
[](https://i.stack.imgur.com/1yvlc.png)
How to reduce the number “0” size to fit fraction "1/2"? (reduce height of "0" ?)
---
update sample
As below photo shows the proportion close to 1/3
[](https://i.stack.imgur.com/Ofr0I.jpg) | 2020/09/19 | [
"https://tex.stackexchange.com/questions/563340",
"https://tex.stackexchange.com",
"https://tex.stackexchange.com/users/221248/"
] | A good solution, in my opinion, to reduce the size discrepancy between fractions (in text mode by default) and ordinary numbers is to use the medium-sized fractions from `nccmath`, which are ca 80 % of \displaystyle:
```
\documentclass{article}
\usepackage{nccmath, mathtools} % for 'bmatrix*' env.
\usepackage{makecell}
\begin{document}
\[ \setcellgapes{3pt}\makegapedcells
\begin{bmatrix*}[r]
\phantom{-}0 & -\mfrac{1}{2} & \mfrac{1}{2} \\
-\mfrac{1}{2} & 0 & -\mfrac{1}{2} \\
\mfrac{1}{2} & -\mfrac{1}{2} & 0
\end{bmatrix*}
\]%
\end{document}
```
[](https://i.stack.imgur.com/i86b7.png) | I would say that your sample actually suggests the opposite: "I want to preserve regular size even for numerators and denominators". Use `\dfrac` instead of `\frac`.
Also, why do you have special treatment for minus? Why the `-` isn't enough?
```
\documentclass{article}
\usepackage{amsmath}
\usepackage{array}
\usepackage{mathtools}
\begin{document}
\renewcommand{\arraystretch}{2}
\[
\begin{bmatrix*}[r]
0 & -\dfrac{1}{2} & \dfrac{1}{2} \\
-\dfrac{1}{2} & 0 & -\dfrac{1}{2} \\
\dfrac{1}{2} & -\dfrac{1}{2} & 0
\end{bmatrix*}
\]
\end{document}
```
[](https://i.stack.imgur.com/QLU1E.png) |
144,739 | Is it possible to install/register another local server instance in any SqlServer version, besides the default local instance, where only one SqlServer version is installed? | 2008/09/27 | [
"https://Stackoverflow.com/questions/144739",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/23087/"
] | Yes, it's possible. I have several combinations in my servers. I have one server that has both SQL Server 2000 and 2005 installed side by side. My desktop at work is a Windows 2003 Server, and I have SQL Server 2005 and 2008 installed side by side.
What you want is called a named instance. There will be a screen during the install, where you will be able to give it a name. | Yes. Usually the installer will detect that you have one or more existing instances and will prompt you for a instance name. We have setup three SQL Server 2000 standard editions on a development box to emulate the three production servers at one of our clients. |
19,343 | I'm trying to define a Display Suite Code Field which would be responsible for converting a list item key (selected in a dropdown on admin side) into an image on the output side. The field simply assumes the list keys:
```
series1|Series 1 Name
series2|Series 2 Name
```
correspond to the images names and the tokenized field definition is as in:
```
<img class="product-series" src="/path/to/image/[node:field-product:field-series].png"/>
```
However what I got after replacement is the label ("Series 1 Name"), instead of the key. Is there a way to force the key replacement? (Yes I know I could drop the Label part, but this would not be admin friendly) | 2012/01/10 | [
"https://drupal.stackexchange.com/questions/19343",
"https://drupal.stackexchange.com",
"https://drupal.stackexchange.com/users/1691/"
] | "Promoted to front page" can be used as a views filter. So you could create views based on that (so it displays node teasers that have a certain taxonomy and are "Promoted to front page").
Another simple way to mimic "Promoted to front page" is to add a taxonomy select field to your content types, and then the taxonomy pages would display the specified content.
Does this answer your question? | Alternative to mtro's answer (which is correct), I find it also useful to use the "flags" module. <http://drupal.org/project/flag>
Create a flag like "promote to sub-page" then create a "sub-page" view which selects nodes with that flag. |
19,343 | I'm trying to define a Display Suite Code Field which would be responsible for converting a list item key (selected in a dropdown on admin side) into an image on the output side. The field simply assumes the list keys:
```
series1|Series 1 Name
series2|Series 2 Name
```
correspond to the images names and the tokenized field definition is as in:
```
<img class="product-series" src="/path/to/image/[node:field-product:field-series].png"/>
```
However what I got after replacement is the label ("Series 1 Name"), instead of the key. Is there a way to force the key replacement? (Yes I know I could drop the Label part, but this would not be admin friendly) | 2012/01/10 | [
"https://drupal.stackexchange.com/questions/19343",
"https://drupal.stackexchange.com",
"https://drupal.stackexchange.com/users/1691/"
] | "Promoted to front page" can be used as a views filter. So you could create views based on that (so it displays node teasers that have a certain taxonomy and are "Promoted to front page").
Another simple way to mimic "Promoted to front page" is to add a taxonomy select field to your content types, and then the taxonomy pages would display the specified content.
Does this answer your question? | Besides, you can also use [Rules](http://drupal.org/project/rules) module.
With Rules, you can specify the condition and action on a node is prompted to front. |
19,343 | I'm trying to define a Display Suite Code Field which would be responsible for converting a list item key (selected in a dropdown on admin side) into an image on the output side. The field simply assumes the list keys:
```
series1|Series 1 Name
series2|Series 2 Name
```
correspond to the images names and the tokenized field definition is as in:
```
<img class="product-series" src="/path/to/image/[node:field-product:field-series].png"/>
```
However what I got after replacement is the label ("Series 1 Name"), instead of the key. Is there a way to force the key replacement? (Yes I know I could drop the Label part, but this would not be admin friendly) | 2012/01/10 | [
"https://drupal.stackexchange.com/questions/19343",
"https://drupal.stackexchange.com",
"https://drupal.stackexchange.com/users/1691/"
] | "Promoted to front page" can be used as a views filter. So you could create views based on that (so it displays node teasers that have a certain taxonomy and are "Promoted to front page").
Another simple way to mimic "Promoted to front page" is to add a taxonomy select field to your content types, and then the taxonomy pages would display the specified content.
Does this answer your question? | you could also use a Boolean field as a simple checkbox and then filter Views on that. |
19,343 | I'm trying to define a Display Suite Code Field which would be responsible for converting a list item key (selected in a dropdown on admin side) into an image on the output side. The field simply assumes the list keys:
```
series1|Series 1 Name
series2|Series 2 Name
```
correspond to the images names and the tokenized field definition is as in:
```
<img class="product-series" src="/path/to/image/[node:field-product:field-series].png"/>
```
However what I got after replacement is the label ("Series 1 Name"), instead of the key. Is there a way to force the key replacement? (Yes I know I could drop the Label part, but this would not be admin friendly) | 2012/01/10 | [
"https://drupal.stackexchange.com/questions/19343",
"https://drupal.stackexchange.com",
"https://drupal.stackexchange.com/users/1691/"
] | Alternative to mtro's answer (which is correct), I find it also useful to use the "flags" module. <http://drupal.org/project/flag>
Create a flag like "promote to sub-page" then create a "sub-page" view which selects nodes with that flag. | Besides, you can also use [Rules](http://drupal.org/project/rules) module.
With Rules, you can specify the condition and action on a node is prompted to front. |
19,343 | I'm trying to define a Display Suite Code Field which would be responsible for converting a list item key (selected in a dropdown on admin side) into an image on the output side. The field simply assumes the list keys:
```
series1|Series 1 Name
series2|Series 2 Name
```
correspond to the images names and the tokenized field definition is as in:
```
<img class="product-series" src="/path/to/image/[node:field-product:field-series].png"/>
```
However what I got after replacement is the label ("Series 1 Name"), instead of the key. Is there a way to force the key replacement? (Yes I know I could drop the Label part, but this would not be admin friendly) | 2012/01/10 | [
"https://drupal.stackexchange.com/questions/19343",
"https://drupal.stackexchange.com",
"https://drupal.stackexchange.com/users/1691/"
] | Alternative to mtro's answer (which is correct), I find it also useful to use the "flags" module. <http://drupal.org/project/flag>
Create a flag like "promote to sub-page" then create a "sub-page" view which selects nodes with that flag. | you could also use a Boolean field as a simple checkbox and then filter Views on that. |
19,343 | I'm trying to define a Display Suite Code Field which would be responsible for converting a list item key (selected in a dropdown on admin side) into an image on the output side. The field simply assumes the list keys:
```
series1|Series 1 Name
series2|Series 2 Name
```
correspond to the images names and the tokenized field definition is as in:
```
<img class="product-series" src="/path/to/image/[node:field-product:field-series].png"/>
```
However what I got after replacement is the label ("Series 1 Name"), instead of the key. Is there a way to force the key replacement? (Yes I know I could drop the Label part, but this would not be admin friendly) | 2012/01/10 | [
"https://drupal.stackexchange.com/questions/19343",
"https://drupal.stackexchange.com",
"https://drupal.stackexchange.com/users/1691/"
] | Besides, you can also use [Rules](http://drupal.org/project/rules) module.
With Rules, you can specify the condition and action on a node is prompted to front. | you could also use a Boolean field as a simple checkbox and then filter Views on that. |
43,633,263 | I have a Spring boot project that uses spring-kafka. In this project I've built some event driven components that wrap spring-kafka beans (namely KafkaTemplate and ConcurrentKafkaListenerContainer). I want to make this project a reusable library accross a set of Spring boot applications. But when I add dependency to this library from a spring boot app I get an error at app startup:
```
APPLICATION FAILED TO START
Description:
Parameter 1 of method kafkaListenerContainerFactory in org.springframework.boot.autoconfigure.kafka.KafkaAnnotationDrivenConfiguration required a bean of type 'org.springframework.kafka.core.ConsumerFactory' that could not be found.
- Bean method 'kafkaConsumerFactory' in 'KafkaAutoConfiguration' not loaded because @ConditionalOnMissingBean (types: org.springframework.kafka.core.ConsumerFactory; SearchStrategy: all) found bean 'kafkaConsumerFactory'
Action:
Consider revisiting the conditions above or defining a bean of type 'org.springframework.kafka.core.ConsumerFactory' in your configuration.
```
Since I need to autowire a `ConsumerFactory<A, B>` (and not a `ConsumerFactory<Object, Object>`) I create this bean in a configuration class that's annotated with @EnableConfigurationProperties(KafkaProperties.class)
All I need is to reuse org.springframework.boot.autoconfigure.kafka.KafkaProperties without other beans being autoconfigured in KafkaAutoConfiguration and KafkaAnnotationDrivenConfiguration.
I've tried to put **@EnableAutoConfiguration(exclude = KafkaAutoConfiguration.class)** in my library but this is not preventing applications that depends on my library to trigger the spring-kafka autoconfiguration excluded in the library.
How can I specify that I don't want autoconfiguration of some beans (KafkaAutoConfiguration and KafkaAnnotationDrivenConfiguration) in my library but **also in any app that depends on this library**? | 2017/04/26 | [
"https://Stackoverflow.com/questions/43633263",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/3484517/"
] | Im found work around to solve this problem by creating AutowireHelper.java and AutowireHelperConfig.java
Put it under spring config folder > util
>
> AutowireHelper.java
>
>
>
```
package com.yourcompany.yourapplicationname.config.util;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
/**
* Helper class which is able to autowire a specified class.
* It holds a static reference to the {@link org.springframework.context.ApplicationContext}.
*/
public final class AutowireHelper implements ApplicationContextAware {
private static final AutowireHelper INSTANCE = new AutowireHelper();
private static ApplicationContext applicationContext;
AutowireHelper() {
}
/**
* Tries to autowire the specified instance of the class if one of the specified beans which need to be autowired
* are null.
*
* @param classToAutowire the instance of the class which holds @Autowire annotations
* @param beansToAutowireInClass the beans which have the @Autowire annotation in the specified {#classToAutowire}
*/
public static void autowire(Object classToAutowire, Object... beansToAutowireInClass) {
for (Object bean : beansToAutowireInClass) {
if (bean == null) {
applicationContext.getAutowireCapableBeanFactory().autowireBean(classToAutowire);
}
}
}
@Override
public void setApplicationContext(final ApplicationContext applicationContext) {
AutowireHelper.applicationContext = applicationContext;
}
/**
* @return the singleton instance.
*/
public static AutowireHelper getInstance() {
return INSTANCE;
}
}
```
>
> AutowireHelperConfig.java
>
>
>
```
package com.yourcompany.yourapplicationname.config.util;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
/**
* configuration class to create an AutowireHelper bean
*/
@Configuration
public class AutowireHelperConfig {
@Bean
public AutowireHelper autowireHelper(){
return new AutowireHelper();
}
}
```
>
> Call service in implement class without getting NULL **Autowire your Service** then call it with **AutowireHelper.autowire(this, this.csvService)** see example below !
>
>
>
```
public class QueWorker implements MessageListener {
@Autowired
private CsvService csvService;
@Override
public void onMessage(Message message) {
Map msgGet = (Map) SerializationUtils.deserialize(message.getBody());
Map<String, Object> data = (Map) msgGet.get("data");
ArrayList containerData = new ArrayList((Collection) msgGet.get("containerData"));
try {
AutowireHelper.autowire(this, this.csvService);
csvService.excutePermit(containerData, data);
System.out.println(" [x] Received Message'");
} catch (Exception e){
e.printStackTrace();
} finally {
System.out.println(" [x] Done Process Message'");
}
}
}
``` | You must annotate CsvService class with some Spring component (example @Service).
```
@Service
public class CsvService {
//Code Here
}
```
And
```
public class QueWorker implements MessageListener {
@Autowired
private CsvService csvService;
}
```
If you have already done that and still it does not work, this must not be visible to spring in class path scan. In your Spring applicatgion main, you need to add
```
@ComponentScan(basePackage="")
```
Add your package name. |
8,495,507 | When I draw lines in my program the position is perfect, but when I use those same coordinates for a square or oval they are way off the mark. My code is:
```
g2d.drawRect(one1, one2, two1, two2);
g2d.drawOval(one1, one2, two1, two2);
```
And the points are gather by:
```
one1 = (int)e.getX();
one2 = (int)e.getY();
```
This is a follow on to a [question I previously asked](https://stackoverflow.com/questions/8479432/lines-arent-drawing-exactly-where-i-clicked). | 2011/12/13 | [
"https://Stackoverflow.com/questions/8495507",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/639627/"
] | Alright, I got what your problem is. If you see the below image, the way that the parameters taken by oval and sqaure are different from the line.
To draw a line --> You will have to specify the starting point and the ending point. Just passing them directly to the Graphics object would do the job for you. However for a Square or Oval, it is different. You first click will grab a point and then you should do some manipulation on what should be the output when you do the second click. The second click should not be considered as a co-ordinate into the drawOval() or drawRect() methods directly.
Because the Parameter for these methods are
```
x, y, width, height
```
Whereas you are getting
```
x1, y1 and x2, y2
```
```
package sof;
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JComponent;
import javax.swing.JFrame;
public class DrawTest {
public static void main(String[] args) {
JFrame frame = new JFrame("Draw Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(new MyComponent());
frame.setSize(260, 280);
frame.setVisible(true);
}
}
class MyComponent extends JComponent {
public void paint(Graphics g) {
int height = 120;
int width = 120;
g.setColor(Color.black);
g.drawOval(60, 60, width, height);
g.drawRect(60, 60, width, height);
g.drawLine(0,0,50,50);
}
}
``` | My guess is that you're capturing the X & Y coordinates for a container (say 200,200) then creating the oval/rect within a NEW container; you state a JLabel above in your comment.
If you're capturing X & Y to be 200,200 for a JPanel, then creating a JLabel and assigning the component an X/Y of 200,200 it is the coordinate within its new component, not the parent in which you captured the X/Y.
Can you post the code where the MouseListener is initiated as well as when the JLabel is created if this is wrong? As others have said we need more code to work from. An image example would be equally beneficial! |
8,495,507 | When I draw lines in my program the position is perfect, but when I use those same coordinates for a square or oval they are way off the mark. My code is:
```
g2d.drawRect(one1, one2, two1, two2);
g2d.drawOval(one1, one2, two1, two2);
```
And the points are gather by:
```
one1 = (int)e.getX();
one2 = (int)e.getY();
```
This is a follow on to a [question I previously asked](https://stackoverflow.com/questions/8479432/lines-arent-drawing-exactly-where-i-clicked). | 2011/12/13 | [
"https://Stackoverflow.com/questions/8495507",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/639627/"
] | I think I understand what your issue is. You are having the user click in two different spots on the canvas and then you want to draw a rectangle/oval using those points. So if the user clicks at 10,10 and then clicks at 20,20, then you want a rectangle whose top left corner is at 10,10 and whose bottom right corner is at 20,20.
If this is in fact what you are asking, then here is my proposed solution:
```
Event e1 = (the first click)
Event e2 = (the second click)
// Figure out where the user clicked
int x1 = (int)e1.getX();
int y1 = (int)e1.getY();
int x2 = (int)e2.getX();
int y2 = (int)e2.getY();
int xCoord;
int yCoord;
// Figure out the coordinates
if(x1 < x2)
xCoord = x1;
else
xCoord = x2;
if(y1 < y2)
yCoord = y1;
else
yCoord = y2;
// Figure out the size of the object
int width = Math.abs(x1 - x2);
int height = Math.abs(y1 - y2);
// Finally draw your objects
g2d.drawRect(xCoord, yCoord, width, height);
g2d.drawOval(xCoord, yCoord, width, height);
```
That should work for you based on my understanding of your question. | My guess is that you're capturing the X & Y coordinates for a container (say 200,200) then creating the oval/rect within a NEW container; you state a JLabel above in your comment.
If you're capturing X & Y to be 200,200 for a JPanel, then creating a JLabel and assigning the component an X/Y of 200,200 it is the coordinate within its new component, not the parent in which you captured the X/Y.
Can you post the code where the MouseListener is initiated as well as when the JLabel is created if this is wrong? As others have said we need more code to work from. An image example would be equally beneficial! |
8,495,507 | When I draw lines in my program the position is perfect, but when I use those same coordinates for a square or oval they are way off the mark. My code is:
```
g2d.drawRect(one1, one2, two1, two2);
g2d.drawOval(one1, one2, two1, two2);
```
And the points are gather by:
```
one1 = (int)e.getX();
one2 = (int)e.getY();
```
This is a follow on to a [question I previously asked](https://stackoverflow.com/questions/8479432/lines-arent-drawing-exactly-where-i-clicked). | 2011/12/13 | [
"https://Stackoverflow.com/questions/8495507",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/639627/"
] | Alright, I got what your problem is. If you see the below image, the way that the parameters taken by oval and sqaure are different from the line.
To draw a line --> You will have to specify the starting point and the ending point. Just passing them directly to the Graphics object would do the job for you. However for a Square or Oval, it is different. You first click will grab a point and then you should do some manipulation on what should be the output when you do the second click. The second click should not be considered as a co-ordinate into the drawOval() or drawRect() methods directly.
Because the Parameter for these methods are
```
x, y, width, height
```
Whereas you are getting
```
x1, y1 and x2, y2
```
```
package sof;
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JComponent;
import javax.swing.JFrame;
public class DrawTest {
public static void main(String[] args) {
JFrame frame = new JFrame("Draw Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(new MyComponent());
frame.setSize(260, 280);
frame.setVisible(true);
}
}
class MyComponent extends JComponent {
public void paint(Graphics g) {
int height = 120;
int width = 120;
g.setColor(Color.black);
g.drawOval(60, 60, width, height);
g.drawRect(60, 60, width, height);
g.drawLine(0,0,50,50);
}
}
``` | I think I understand what your issue is. You are having the user click in two different spots on the canvas and then you want to draw a rectangle/oval using those points. So if the user clicks at 10,10 and then clicks at 20,20, then you want a rectangle whose top left corner is at 10,10 and whose bottom right corner is at 20,20.
If this is in fact what you are asking, then here is my proposed solution:
```
Event e1 = (the first click)
Event e2 = (the second click)
// Figure out where the user clicked
int x1 = (int)e1.getX();
int y1 = (int)e1.getY();
int x2 = (int)e2.getX();
int y2 = (int)e2.getY();
int xCoord;
int yCoord;
// Figure out the coordinates
if(x1 < x2)
xCoord = x1;
else
xCoord = x2;
if(y1 < y2)
yCoord = y1;
else
yCoord = y2;
// Figure out the size of the object
int width = Math.abs(x1 - x2);
int height = Math.abs(y1 - y2);
// Finally draw your objects
g2d.drawRect(xCoord, yCoord, width, height);
g2d.drawOval(xCoord, yCoord, width, height);
```
That should work for you based on my understanding of your question. |
31,164,883 | I want to click on a checkbox and if I click this box it should run a function what gets an ID and saves it into an array or deletes it from the array if it still exists in the array.
That works, but if I click on the text beside the box the function runs twice. It first writes the ID into the array and then deletes it.
I hope you can help me so that I can click on the text and it just runs once
**HTML**
```
<label><input type="checkbox" value="XXX" >Active</label>
```
**JavaScript/jQuery**
```
function addOrRemoveBoxes(ID){
if(boxArr.indexOf(ID) != -1){
removeFromArray(ID)
}
else{
boxArr.push(ID);
}
}
$(".checkBoxes").unbind().click(function() {
event.stopPropagation();
addOrRemoveBoxes($(this).find('input').val());
});
``` | 2015/07/01 | [
"https://Stackoverflow.com/questions/31164883",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/5068532/"
] | Looks like the AWS Node JS has a bug, in that we need not mention the data type for the keys.
I tried this and it worked well
```
{
"RequestItems":{
"<TableName>":{
"Keys":[
{"<HashKeyName>":"<HashKeyValue1>", "<RangeKeyName>":"<RangeKeyValue2>"},
{"<HashKeyName>":"<HashKeyValue2>", "<RangeKeyName>":"<RangeKeyValue2>"}
]
}
}
}
``` | You get this error when the schema of your table does not match the key schema of the keys you provided. You provided a key with Hash=String and Range=String. What is the schema of your table? You can use the [DescribeTable](http://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_DescribeTable.html) API to get the schema of your table. |
30,311,640 | The error message of gcc 4.9.2 is:
```
could not convert from '<brace-enclosed initializer list>' to 'std::vector<std::pair<float, float> >'
```
of this code:
```
vector<pair<GLfloat, GLfloat>> LightOneColorsPairVec {{0.5f, 0.5f, 0.5f, 1.0f}, {0.0f, 0.0f, 1.0f, 1.0f}};
```
The code is compiled with 'std=c++11' compiler flag. | 2015/05/18 | [
"https://Stackoverflow.com/questions/30311640",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/3163389/"
] | First of all because [`std::pair`](http://en.cppreference.com/w/cpp/utility/pair) doesn't have [constructor](http://en.cppreference.com/w/cpp/utility/pair/pair) that takes a [`std::initializer_list`](http://en.cppreference.com/w/cpp/utility/initializer_list). Secondly because `std::pair` is a *pair*, it only have two values, not four. | As Joachim Pileborg pointed out pairs are not similar to vectors, so I converted the code to this:
```
vector<vector<vector<GLfloat>>> LightColorsVec {{{0.5f, 0.5f, 0.5f, 1.0f}, {0.0f, 0.0f, 1.0f, 1.0f}}};
```
And it works for multiple light sources now. |
40,349,778 | I hava a list of sings:
```
var sings = [",",".",":","!","?"]
```
How do I check if a word contains one of these signs and return it?
For example:
```
"But,"
return ","
"Finished."
return "."
"Questions?"
return "?"
``` | 2016/10/31 | [
"https://Stackoverflow.com/questions/40349778",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/1583481/"
] | Here is example function
```
var checkSigns = function(str) {
var signs = [",",".",":","!","?"];
for (var i = 0; i < signs.length; i++) {
if (str.indexOf[signs[i]] !== -1) {
return signs[i];
}
}
};
``` | You can use `filter()` and `indexOf()` and return array of signs that are found in string.
```js
var signs = [",",".",":","!","?"];
function check(str, arr) {
return arr.filter(function(e) {
return str.indexOf(e) != -1
})
}
console.log(check("But,", signs))
console.log(check("Finished.", signs))
``` |
40,349,778 | I hava a list of sings:
```
var sings = [",",".",":","!","?"]
```
How do I check if a word contains one of these signs and return it?
For example:
```
"But,"
return ","
"Finished."
return "."
"Questions?"
return "?"
``` | 2016/10/31 | [
"https://Stackoverflow.com/questions/40349778",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/1583481/"
] | You could solve that with a regular expression:
```js
function match(input) {
var regex = /([,\.\:!\?])/;
var matches = input.match(regex);
return matches ? matches[0] : false;
}
console.log(match("foo?")); // "?"
console.log(match("bar.")); // "."
console.log(match("foobar")); // false
``` | Here is example function
```
var checkSigns = function(str) {
var signs = [",",".",":","!","?"];
for (var i = 0; i < signs.length; i++) {
if (str.indexOf[signs[i]] !== -1) {
return signs[i];
}
}
};
``` |
40,349,778 | I hava a list of sings:
```
var sings = [",",".",":","!","?"]
```
How do I check if a word contains one of these signs and return it?
For example:
```
"But,"
return ","
"Finished."
return "."
"Questions?"
return "?"
``` | 2016/10/31 | [
"https://Stackoverflow.com/questions/40349778",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/1583481/"
] | Here is example function
```
var checkSigns = function(str) {
var signs = [",",".",":","!","?"];
for (var i = 0; i < signs.length; i++) {
if (str.indexOf[signs[i]] !== -1) {
return signs[i];
}
}
};
``` | Try this prototype `str.hasSign();` return `sign` if contains or `false` if not.
```js
String.prototype.hasSigns = function() {
var signs = [",", ".", ":", "!", "?"];
for (var i = 0; i < signs.length; i++) {
if (this.indexOf(signs[i]) > -1) return signs[i];
}
return false;
}
console.log("football, basketball".hasSigns());
console.log("1-3".hasSigns());
console.log("Good!".hasSigns());
``` |
40,349,778 | I hava a list of sings:
```
var sings = [",",".",":","!","?"]
```
How do I check if a word contains one of these signs and return it?
For example:
```
"But,"
return ","
"Finished."
return "."
"Questions?"
return "?"
``` | 2016/10/31 | [
"https://Stackoverflow.com/questions/40349778",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/1583481/"
] | You could solve that with a regular expression:
```js
function match(input) {
var regex = /([,\.\:!\?])/;
var matches = input.match(regex);
return matches ? matches[0] : false;
}
console.log(match("foo?")); // "?"
console.log(match("bar.")); // "."
console.log(match("foobar")); // false
``` | You can use `filter()` and `indexOf()` and return array of signs that are found in string.
```js
var signs = [",",".",":","!","?"];
function check(str, arr) {
return arr.filter(function(e) {
return str.indexOf(e) != -1
})
}
console.log(check("But,", signs))
console.log(check("Finished.", signs))
``` |
40,349,778 | I hava a list of sings:
```
var sings = [",",".",":","!","?"]
```
How do I check if a word contains one of these signs and return it?
For example:
```
"But,"
return ","
"Finished."
return "."
"Questions?"
return "?"
``` | 2016/10/31 | [
"https://Stackoverflow.com/questions/40349778",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/1583481/"
] | You could solve that with a regular expression:
```js
function match(input) {
var regex = /([,\.\:!\?])/;
var matches = input.match(regex);
return matches ? matches[0] : false;
}
console.log(match("foo?")); // "?"
console.log(match("bar.")); // "."
console.log(match("foobar")); // false
``` | Try this prototype `str.hasSign();` return `sign` if contains or `false` if not.
```js
String.prototype.hasSigns = function() {
var signs = [",", ".", ":", "!", "?"];
for (var i = 0; i < signs.length; i++) {
if (this.indexOf(signs[i]) > -1) return signs[i];
}
return false;
}
console.log("football, basketball".hasSigns());
console.log("1-3".hasSigns());
console.log("Good!".hasSigns());
``` |
891,714 | We have application which is using some additional files from one catalog. Right now when some of this file is changed we need to log in to each application container clone repository and copy files to catalog. We want to automate this process without rebuilding/restarting whole application.
Is there some native approach how to handle such thing?
I was thinking about using docker volume which is use/share by all containers and when is such need to rebuild just volume. Will it work as im expecting without restarting containers which are using this volume?
Or maybe there is some better solution for such case eg like NFS volumes? | 2018/01/11 | [
"https://serverfault.com/questions/891714",
"https://serverfault.com",
"https://serverfault.com/users/278626/"
] | Have a look at PersistentVolume [Access Modes](https://kubernetes.io/docs/concepts/storage/persistent-volumes/#access-modes) matrix. What you are looking for is either ROX or RWX support. ROX is more common but you'll need some side process to update the content. RWX give you full access to change content on these volumes from any pod.
ROX support is by definition much wider, as you do not need distributed write locking, so if you can handle that (and I think that in your case it is quite probable) that would be the best choice for a shared PV where your changing data can be stored. | It looks like you have already found a solution by making use of NFS mounted volume. There are a number of other volume options available for those who read this seeking a similar solution.
If you only need pods on a single node to be able to access a volume, the the options for Access Mode 'ReadWriteOnce' in this [table](https://kubernetes.io/docs/concepts/storage/persistent-volumes/#access-modes) display types of volumes that maybe suitable.
If you need your pods (either on the same node or different nodes) to only read information in a volume, then some of the other 'ReadOnlyMany' options may also be suitable (please see the table [here](https://kubernetes.io/docs/concepts/storage/persistent-volumes/#access-modes)).
There are also options for mounting volumes that allow read/write access to multiple nodes classed under the access mode 'ReadWriteMany' in the same [table](https://kubernetes.io/docs/concepts/storage/persistent-volumes/#access-modes).
As there is such a large number of options, some may be more suited to each use case, but more information can be found [here](https://kubernetes.io/docs/concepts/storage/volumes/#types-of-volumes) about the specifics for each type of volume. |
1,532,937 | I know this is a pretty simple question, but I'm just not getting the textbook... I'm taking a basic CS course and on one of the problems (not an assigned homework problem, just one I'm practicing on), it says that
>
> on the set of all integers, the relation $x \ne$ y is symmetric but not transitive where $(x,y) \in \Bbb R$.
>
>
>
I understand why it's symmetric, but why is it not transitive? I'm thinking it has something to do with the definition of transitive including ALL $a,b,c \in A$, but I'm not sure. I understand transitive in the context of a finite set, but something about applying it to all integers is throwing me off. | 2015/11/17 | [
"https://math.stackexchange.com/questions/1532937",
"https://math.stackexchange.com",
"https://math.stackexchange.com/users/264450/"
] | Let $f(x)=x^p$
By convexity $$f(\frac{X+Y}{2})\leq \frac{1}{2} f(X)+\frac{1}{2} f(Y) \implies \frac{(X+Y)^p}{2^p}\leq\frac{1}{2} X^p+\frac{1}{2}Y^p$$
The result follows. | If $p>1$, then by Holder inequality,
\begin{align\*}
X+Y &\le (X^p+Y^p)^{\frac{1}{p}} 2^{1-\frac{1}{p}}.
\end{align\*}
That is,
\begin{align\*}
(X+Y)^p \le 2^{p-1} (X^p+Y^p).
\end{align\*}
For $0 \le p \le 1$, we note that
\begin{align\*}
\left(\frac{X}{X+Y} \right)^p + \left(\frac{Y}{X+Y} \right)^p \ge \frac{X}{X+Y}+ \frac{Y}{X+Y}=1,
\end{align\*}
and then
\begin{align\*}
(X+Y)^p \le X^p+Y^p.
\end{align\*} |
104,851 | We started learning about electromagnetism in physics class, and the Right Hand Rule comes in handy as seems easy to use, but I'm curious as to how it actually works. I guess it's more of a math question since I think it just involves solving the cross product of the velocity of the charge and the magnetic field. I don't know anything about cross products, but I searched some things up and it seems that the matrix is has unit vectors in it which determine the directions, so would one have to solve the whole thing to determine the direction of the force on the charge? I know it has to be perpendicular to both of the vectors but that still leaves 2 directions. | 2014/03/23 | [
"https://physics.stackexchange.com/questions/104851",
"https://physics.stackexchange.com",
"https://physics.stackexchange.com/users/41058/"
] | The formula for the force of a particle due to its magnetic field is $F = q \vec v \times \vec B$. The cross product has the property that its result is always perpendicular to both arguments.
Its direction is simply a result of how the cross product function is defined and the sign of electric charge (an electron is defined as negative).
It is important to note that the order of the arguments matters as the cross product function is not commutative; generally $ \vec A \times \vec B \neq \vec B \times \vec A$. For vectors the direction will be reversed; for matrices both sides can be wildly different. | Look at the diagram below,
Two vectors $B$ ***(Magnetic field vector )*** and $v$ ***( velocity vector of a proton )*** shown in the diagram are perpendicular to each other. Here, I have considered the simplest case where the two vectors are perpendicular to each other. The cross product of $B$ and $v$ gives us another vector $F$ ***( Force vector )*** which points in a direction perpendicular to both $B$ and $v$. This is the geometric meaning of the cross product. Say, $B$ and $v$ lie on the $x$-$y$ $plane$. The force vector obtained as a result of the cross product will point in a direction that is perpendicular to the $x$-$y$ $plane$. $F$ therefore points in a direction parallel to the $z$ $axis$. This leaves us with a question. In which direction does $F$ point? $-z$ $axis$ direction or $+z$ $axis$ direction. Using the $Right$ $Hand$ $Rule$, one can easily solve this issue.
Look at the diagram below,
Place your right hand on $v$. Now, curl your fingers in the direction of $B$.
Here, $B$ is considered to be coming out of the screen. As you curl your fingers, you see that they are also coming out of the screen( in the direction of $B$ ). The thumb points in the direction of $F$. If $B$ were considered to be going into the page, $F$ would have pointed downwards.
Remember, I worked with a ***proton***. If one works with an electron, one has to flip the direction of the force due to its opposite nature. |
104,851 | We started learning about electromagnetism in physics class, and the Right Hand Rule comes in handy as seems easy to use, but I'm curious as to how it actually works. I guess it's more of a math question since I think it just involves solving the cross product of the velocity of the charge and the magnetic field. I don't know anything about cross products, but I searched some things up and it seems that the matrix is has unit vectors in it which determine the directions, so would one have to solve the whole thing to determine the direction of the force on the charge? I know it has to be perpendicular to both of the vectors but that still leaves 2 directions. | 2014/03/23 | [
"https://physics.stackexchange.com/questions/104851",
"https://physics.stackexchange.com",
"https://physics.stackexchange.com/users/41058/"
] | The formula for the force of a particle due to its magnetic field is $F = q \vec v \times \vec B$. The cross product has the property that its result is always perpendicular to both arguments.
Its direction is simply a result of how the cross product function is defined and the sign of electric charge (an electron is defined as negative).
It is important to note that the order of the arguments matters as the cross product function is not commutative; generally $ \vec A \times \vec B \neq \vec B \times \vec A$. For vectors the direction will be reversed; for matrices both sides can be wildly different. | The cross product does not have a specific direction, but either the left hand rule or right hand rule works, but it has to be applied consistantly. That's the key. So you simply drum in one rule in everywhere.
It's kind of like driving to the left or to the right. Either works, but you have to be consistant about it. |
104,851 | We started learning about electromagnetism in physics class, and the Right Hand Rule comes in handy as seems easy to use, but I'm curious as to how it actually works. I guess it's more of a math question since I think it just involves solving the cross product of the velocity of the charge and the magnetic field. I don't know anything about cross products, but I searched some things up and it seems that the matrix is has unit vectors in it which determine the directions, so would one have to solve the whole thing to determine the direction of the force on the charge? I know it has to be perpendicular to both of the vectors but that still leaves 2 directions. | 2014/03/23 | [
"https://physics.stackexchange.com/questions/104851",
"https://physics.stackexchange.com",
"https://physics.stackexchange.com/users/41058/"
] | The formula for the force of a particle due to its magnetic field is $F = q \vec v \times \vec B$. The cross product has the property that its result is always perpendicular to both arguments.
Its direction is simply a result of how the cross product function is defined and the sign of electric charge (an electron is defined as negative).
It is important to note that the order of the arguments matters as the cross product function is not commutative; generally $ \vec A \times \vec B \neq \vec B \times \vec A$. For vectors the direction will be reversed; for matrices both sides can be wildly different. | The right hand rule is simply a mathematical convention. We use right handed coordinate systems. We could make the left hand rule true if we wanted to, but we would need to adapt our equations to the new convention. |
16,810,876 | I have an Iphone application in which I had 10 tab items in the tab bar.
I don't want to add the more button behaviour of the tab bar here.
Instead of that **I need to make my tab bar as scrollable**.
Can anybody had the idea or links to illustrate this?
Can anybody guide me in the right direction? | 2013/05/29 | [
"https://Stackoverflow.com/questions/16810876",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/834925/"
] | But You can not use the `UITabbar`. You need to create custom `UITabbar` that behave the same.
Here are links of some projects will help you more.
1. [Infinte Tab Bar](https://www.cocoacontrols.com/controls/infinitabbar)
2. [Scrollable Tab Bar](https://github.com/jasarien/JSScrollableTabBar) | Have you tried looking here?
[How to make a horizontal scrollable UITabBar in iOS?](https://stackoverflow.com/questions/8482661/how-to-make-a-horizontal-scrollable-uitabbar-in-ios)
Although, and this is the reason im not writing a comment, i would not use a scrollview, as described in the accepted answer. Instead, i would go for a uipickerview, and rotate it 90 degrees using CGAffineTransformRotate. Let me know if this works. |
16,810,876 | I have an Iphone application in which I had 10 tab items in the tab bar.
I don't want to add the more button behaviour of the tab bar here.
Instead of that **I need to make my tab bar as scrollable**.
Can anybody had the idea or links to illustrate this?
Can anybody guide me in the right direction? | 2013/05/29 | [
"https://Stackoverflow.com/questions/16810876",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/834925/"
] | But You can not use the `UITabbar`. You need to create custom `UITabbar` that behave the same.
Here are links of some projects will help you more.
1. [Infinte Tab Bar](https://www.cocoacontrols.com/controls/infinitabbar)
2. [Scrollable Tab Bar](https://github.com/jasarien/JSScrollableTabBar) | 1) define `UIScrollview *scrollview`
2) drag and drop scroll view
3) connect instance and delegate in xib
4) set frame of scrollview more so it is scrollable and more than view size
5) add uitabbar as subview to scrollview
```
[uitabar instance addsubview:scrollview];
``` |
13,155,318 | Can somebody please suggest me when would I need a Level-Order Traversal (to solve some practical/real-life scenario)? | 2012/10/31 | [
"https://Stackoverflow.com/questions/13155318",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/-1/"
] | [Level order traversal](http://en.wikipedia.org/wiki/Tree_traversal#Queue-based_level_order_traversal) is actually a Breadth First Search, which is not recursive by nature.
From: <http://en.wikipedia.org/wiki/Breadth-first_search>
Breadth-first search can be used to solve many problems in graph theory, for example:
* Finding all nodes within one connected component
* Copying Collection, Cheney's algorithm
* Finding the shortest path between two nodes u and - v (with path length measured by number of edges)
* Testing a graph for bipartiteness
* (Reverse) Cuthill–McKee mesh numbering
* Ford–Fulkerson method for computing the maximum flow in a flow network
* Serialization/Deserialization of a binary tree vs serialization in
sorted order, allows the tree to be re-constructed in an efficient
manner. | Google Map Direction is using Level Order Traversal (BFS) all the time.
Algorithms repeat the same method choosing the node nearest to the intersection points, eventually selecting the route with the shortest length.
<http://blog.hackerearth.com/breadth-first-search-algorithm-example-working-of-gps-navigation> |
275,272 | If I build a module with a indexer, is Magento going to run the reindex automatically each night or do I need to create a cronjob for it? | 2019/05/20 | [
"https://magento.stackexchange.com/questions/275272",
"https://magento.stackexchange.com",
"https://magento.stackexchange.com/users/40598/"
] | If you want the reindex happen automatically, you need to set a cronjob for that. Please refer [here](https://magento.stackexchange.com/questions/269624/how-to-check-whether-the-reindex-working-or-not-in-magento) for detailed explanations: | Automatic re-indexing always require a active Cronjob |
528,999 | I have two servers in a pool with Nginx, PHP5-FPM and Memcached. For some reason, the first server in the pool seems to inexplicably lose about 2GB of RAM. I can't explain where it's going.
A reboot gets everything back to normal, but after a few hours the RAM is used again.
At first I thought it was down to memcached, but eventually I'd killed every process I could reasonably kill and the memory was not released. Even init 1 did not free the memory.
ipcs -m is empty and slabtop looks much the same on this and the server in the pool which is using very little memory.
df shows about 360K in tmpfs
In case it's relevant, the two servers are nearly identical in that they are both running the same OS at the same level of updates on the same hypervisor (VMWare ESXi 4.1) on different hosts but with identical hardware. The differences are that:-
* The first server has an NFS mount. I tried unmounting this and removing the modules but no change to RAM usage
* The first server listens for HTTP and HTTPS sites while the second only listens for HTTP.
Here's the output of free -m ...
```
total used free shared buffers cached
Mem: 3953 3458 494 0 236 475
-/+ buffers/cache: 2746 1206
Swap: 1023 0 1023
```
Here's /proc/meminfo ...
```
MemTotal: 4048392 kB
MemFree: 506576 kB
Buffers: 242252 kB
Cached: 486796 kB
SwapCached: 8 kB
Active: 375240 kB
Inactive: 369312 kB
Active(anon): 12320 kB
Inactive(anon): 3596 kB
Active(file): 362920 kB
Inactive(file): 365716 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 1048572 kB
SwapFree: 1048544 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 15544 kB
Mapped: 3084 kB
Shmem: 412 kB
Slab: 94516 kB
SReclaimable: 75104 kB
SUnreclaim: 19412 kB
KernelStack: 632 kB
PageTables: 1012 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 3072768 kB
Committed_AS: 20060 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 281340 kB
VmallocChunk: 34359454584 kB
HardwareCorrupted: 0 kB
AnonHugePages: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 59392 kB
DirectMap2M: 4134912 kB
```
Here's the process list at the time ...
```
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 24336 2160 ? Ss Jul22 0:09 /sbin/init
root 2 0.0 0.0 0 0 ? S Jul22 0:00 [kthreadd]
root 3 0.0 0.0 0 0 ? S Jul22 0:38 [ksoftirqd/0]
root 5 0.0 0.0 0 0 ? S Jul22 0:00 [kworker/u:0]
root 6 0.0 0.0 0 0 ? S Jul22 0:04 [migration/0]
root 7 0.0 0.0 0 0 ? S Jul22 0:32 [watchdog/0]
root 8 0.0 0.0 0 0 ? S Jul22 0:04 [migration/1]
root 10 0.0 0.0 0 0 ? S Jul22 0:22 [ksoftirqd/1]
root 11 0.0 0.0 0 0 ? S Jul22 0:15 [kworker/0:1]
root 12 0.0 0.0 0 0 ? S Jul22 0:31 [watchdog/1]
root 13 0.0 0.0 0 0 ? S Jul22 0:04 [migration/2]
root 15 0.0 0.0 0 0 ? S Jul22 0:04 [ksoftirqd/2]
root 16 0.0 0.0 0 0 ? S Jul22 0:14 [watchdog/2]
root 17 0.0 0.0 0 0 ? S Jul22 0:04 [migration/3]
root 19 0.0 0.0 0 0 ? S Jul22 0:04 [ksoftirqd/3]
root 20 0.0 0.0 0 0 ? S Jul22 0:11 [watchdog/3]
root 21 0.0 0.0 0 0 ? S< Jul22 0:00 [cpuset]
root 22 0.0 0.0 0 0 ? S< Jul22 0:00 [khelper]
root 23 0.0 0.0 0 0 ? S Jul22 0:00 [kdevtmpfs]
root 24 0.0 0.0 0 0 ? S< Jul22 0:00 [netns]
root 25 0.0 0.0 0 0 ? S Jul22 0:02 [sync_supers]
root 26 0.0 0.0 0 0 ? S Jul22 0:21 [kworker/u:1]
root 27 0.0 0.0 0 0 ? S Jul22 0:00 [bdi-default]
root 28 0.0 0.0 0 0 ? S< Jul22 0:00 [kintegrityd]
root 29 0.0 0.0 0 0 ? S< Jul22 0:00 [kblockd]
root 30 0.0 0.0 0 0 ? S< Jul22 0:00 [ata_sff]
root 31 0.0 0.0 0 0 ? S Jul22 0:00 [khubd]
root 32 0.0 0.0 0 0 ? S< Jul22 0:00 [md]
root 34 0.0 0.0 0 0 ? S Jul22 0:04 [khungtaskd]
root 35 0.0 0.0 0 0 ? S Jul22 0:15 [kswapd0]
root 36 0.0 0.0 0 0 ? SN Jul22 0:00 [ksmd]
root 37 0.0 0.0 0 0 ? SN Jul22 0:00 [khugepaged]
root 38 0.0 0.0 0 0 ? S Jul22 0:00 [fsnotify_mark]
root 39 0.0 0.0 0 0 ? S Jul22 0:00 [ecryptfs-kthrea]
root 40 0.0 0.0 0 0 ? S< Jul22 0:00 [crypto]
root 48 0.0 0.0 0 0 ? S< Jul22 0:00 [kthrotld]
root 50 0.0 0.0 0 0 ? S Jul22 2:59 [kworker/1:1]
root 51 0.0 0.0 0 0 ? S Jul22 0:00 [scsi_eh_0]
root 52 0.0 0.0 0 0 ? S Jul22 0:00 [scsi_eh_1]
root 57 0.0 0.0 0 0 ? S Jul22 0:09 [kworker/3:1]
root 74 0.0 0.0 0 0 ? S< Jul22 0:00 [devfreq_wq]
root 114 0.0 0.0 0 0 ? S Jul22 0:00 [kworker/3:2]
root 128 0.0 0.0 0 0 ? S Jul22 0:00 [kworker/1:2]
root 139 0.0 0.0 0 0 ? S Jul22 0:00 [kworker/0:2]
root 249 0.0 0.0 0 0 ? S< Jul22 0:00 [mpt_poll_0]
root 250 0.0 0.0 0 0 ? S< Jul22 0:00 [mpt/0]
root 259 0.0 0.0 0 0 ? S Jul22 0:00 [scsi_eh_2]
root 273 0.0 0.0 0 0 ? S Jul22 0:20 [jbd2/sda1-8]
root 274 0.0 0.0 0 0 ? S< Jul22 0:00 [ext4-dio-unwrit]
root 377 0.0 0.0 0 0 ? S Jul22 0:26 [jbd2/sdb1-8]
root 378 0.0 0.0 0 0 ? S< Jul22 0:00 [ext4-dio-unwrit]
root 421 0.0 0.0 17232 584 ? S Jul22 0:00 upstart-udev-bridge --daemon
root 438 0.0 0.0 21412 1176 ? Ss Jul22 0:00 /sbin/udevd --daemon
root 446 0.0 0.0 0 0 ? S< Jul22 0:00 [rpciod]
root 448 0.0 0.0 0 0 ? S< Jul22 0:00 [nfsiod]
root 612 0.0 0.0 21408 772 ? S Jul22 0:00 /sbin/udevd --daemon
root 613 0.0 0.0 21728 924 ? S Jul22 0:00 /sbin/udevd --daemon
root 700 0.0 0.0 0 0 ? S< Jul22 0:00 [kpsmoused]
root 849 0.0 0.0 15188 388 ? S Jul22 0:00 upstart-socket-bridge --daemon
root 887 0.0 0.0 0 0 ? S Jul22 0:00 [lockd]
root 919 0.0 0.0 14504 952 tty4 Ss+ Jul22 0:00 /sbin/getty -8 38400 tty4
root 922 0.0 0.0 14504 952 tty5 Ss+ Jul22 0:00 /sbin/getty -8 38400 tty5
root 924 0.0 0.0 14504 944 tty2 Ss+ Jul22 0:00 /sbin/getty -8 38400 tty2
root 925 0.0 0.0 14504 944 tty3 Ss+ Jul22 0:00 /sbin/getty -8 38400 tty3
root 930 0.0 0.0 14504 952 tty6 Ss+ Jul22 0:00 /sbin/getty -8 38400 tty6
root 940 0.0 0.0 0 0 ? S Jul22 0:07 [flush-8:0]
root 1562 0.0 0.0 58792 1740 tty1 Ss Jul22 0:00 /bin/login --
root 12969 0.0 0.0 0 0 ? S 07:18 0:02 [kworker/2:2]
root 30051 0.0 0.0 0 0 ? S 10:13 0:00 [flush-8:16]
root 30909 0.0 0.0 0 0 ? S 10:14 0:00 [kworker/2:1]
johncc 30921 0.2 0.2 26792 9360 tty1 S 10:17 0:00 -bash
root 31089 0.0 0.0 0 0 ? S 10:18 0:00 [kworker/0:0]
root 31099 0.0 0.0 42020 1808 tty1 S 10:19 0:00 sudo -i
root 31100 0.2 0.1 22596 5168 tty1 S 10:19 0:00 -bash
root 31187 0.0 0.0 0 0 ? S 10:19 0:00 [kworker/2:0]
root 31219 0.0 0.0 16880 1252 tty1 R+ 10:22 0:00 ps aux
root 31220 0.0 0.0 53924 536 tty1 R+ 10:22 0:00 curl -F sprunge=<- http://sprunge.us
```
Can anyone suggest what to try next, or how to debug this problem? I'm at a loss! | 2013/08/06 | [
"https://serverfault.com/questions/528999",
"https://serverfault.com",
"https://serverfault.com/users/123168/"
] | The machine is a virtual guest running on **ESXi** hypervisor. What about **memory ballooning**? First of all, I would recommend you to check ESXi/vCenter memory/balloon statistics of this guest.
It can happen that the hypervisor asked the guest to "inflate" the balloon in order to allocate some additional memory, e.g. for other running guests. But this requires to have loaded a balloon driver which is available as a kernel module **vmmemctl**.
Finally, the obvious question may be whether the guest has vmware tools installed and running as I can't see any related processes in the process list you provided. By the change, wasn't there any **vmware-guestd** process before you started killing them? | The watch command may be useful. Try watch -n 5 free to monitor memory usage with updates every five seconds.
Also
htop is the best solution.
```
sudo apt-get install htop
```
This way you will notice what programs is using most RAM. and you can easily terminate one if you want to. |
40,128,449 | Hi I remove my ssl cert from my website. I fixed the database from showing HTTPS and remove the necessary lines from htaccess file . but for now - anyone how trying to enter to my wordpress website get an error message (because the ssl...) How can I forward the user from HTTPS TO HTTP?
htaccess below:
```
text/x-generic .htaccess ( ASCII text )
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
# <IfModule mod_rewrite.c>
# RewriteEngine On
# RewriteCond %{SERVER_PORT} 80
# RewriteRule ^(.*)$ https://www.*****.com/$1 [R,L]
# </IfModule>
<IfModule mod_headers.c>
Header add Access-Control-Allow-Origin "*"
</IfModule>
Header unset Pragma
FileETag None
Header unset ETag
## EXPIRES CACHING ##
<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType image/jpg "access 1 year"
ExpiresByType image/jpeg "access 1 year"
ExpiresByType image/gif "access 1 year"
ExpiresByType image/png "access 1 year"
ExpiresByType text/css "access 1 month"
ExpiresByType text/html "access 1 month"
ExpiresByType application/pdf "access 1 month"
ExpiresByType text/x-javascript "access 1 month"
ExpiresByType application/x-shockwave-flash "access 1 month"
ExpiresByType image/x-icon "access 1 year"
ExpiresDefault "access 1 month"
</IfModule>
## EXPIRES CACHING ##
<FilesMatch "\\.(js|css|html|htm|php|xml)$">
SetOutputFilter DEFLATE
</FilesMatch>
<IfModule mod_gzip.c>
mod_gzip_on Yes
mod_gzip_dechunk Yes
mod_gzip_item_include file \.(html?|txt|css|js|php|pl)$
mod_gzip_item_include handler ^cgi-script$
mod_gzip_item_include mime ^text/.*
mod_gzip_item_include mime ^application/x-javascript.*
mod_gzip_item_exclude mime ^image/.*
mod_gzip_item_exclude rspheader ^Content-Encoding:.*gzip.*
</IfModule>
``` | 2016/10/19 | [
"https://Stackoverflow.com/questions/40128449",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/7041592/"
] | It is a bad practice to use NSDictionary for storing data. Create new class for section (i.e. SectionData) and row (i.e. RowData). Your ViewController (or some other data provider) will keep array of SectionData, where SectionData keeps array of RowData. RowData may contain func for handling row selection, so in didSelectRowAtindexPath you just do something like this:
```
let rowData = rowDataAtIndexPath(indexPath)
rowData.tapHandler()
```
where rowDataAtIndexPath is your defined function that gives you data for indexPath.
When you need to remove some section, just remove it from array of sections and reload tableView. | I think this talk is broader than what you are seeking but he talks about it.
<https://realm.io/news/altconf-benji-encz-uikit-inside-out-declarative-programming/> |
40,128,449 | Hi I remove my ssl cert from my website. I fixed the database from showing HTTPS and remove the necessary lines from htaccess file . but for now - anyone how trying to enter to my wordpress website get an error message (because the ssl...) How can I forward the user from HTTPS TO HTTP?
htaccess below:
```
text/x-generic .htaccess ( ASCII text )
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
# <IfModule mod_rewrite.c>
# RewriteEngine On
# RewriteCond %{SERVER_PORT} 80
# RewriteRule ^(.*)$ https://www.*****.com/$1 [R,L]
# </IfModule>
<IfModule mod_headers.c>
Header add Access-Control-Allow-Origin "*"
</IfModule>
Header unset Pragma
FileETag None
Header unset ETag
## EXPIRES CACHING ##
<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType image/jpg "access 1 year"
ExpiresByType image/jpeg "access 1 year"
ExpiresByType image/gif "access 1 year"
ExpiresByType image/png "access 1 year"
ExpiresByType text/css "access 1 month"
ExpiresByType text/html "access 1 month"
ExpiresByType application/pdf "access 1 month"
ExpiresByType text/x-javascript "access 1 month"
ExpiresByType application/x-shockwave-flash "access 1 month"
ExpiresByType image/x-icon "access 1 year"
ExpiresDefault "access 1 month"
</IfModule>
## EXPIRES CACHING ##
<FilesMatch "\\.(js|css|html|htm|php|xml)$">
SetOutputFilter DEFLATE
</FilesMatch>
<IfModule mod_gzip.c>
mod_gzip_on Yes
mod_gzip_dechunk Yes
mod_gzip_item_include file \.(html?|txt|css|js|php|pl)$
mod_gzip_item_include handler ^cgi-script$
mod_gzip_item_include mime ^text/.*
mod_gzip_item_include mime ^application/x-javascript.*
mod_gzip_item_exclude mime ^image/.*
mod_gzip_item_exclude rspheader ^Content-Encoding:.*gzip.*
</IfModule>
``` | 2016/10/19 | [
"https://Stackoverflow.com/questions/40128449",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/7041592/"
] | An approach I use when creating a table where I know all the possible sections is with enums. You create an enum for each of the possible section types:
`enum SectionTypes { case sectionA, sectionB, sectionC }`
And then create a variable to hold the sections:
`var sections: [SectionTypes]`
When you have your data ready then you populate sections with the sections that needs to be displayed. I usually also make a method to help get the section:
```
func getSection(forSection: Int) -> SectionTypes {
return sections[forSection]
}
```
With this in place you can start implementing the common DataSource delegate methods:
```
func numberOfSections(in collectionView: UICollectionView) -> Int {
return sections.count
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
switch getSection(forSection: section) {
case .sectionA:
return 0 //Add the code to get the count of rows for this section
case .sectionB:
return 0
default:
return 0
}
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
switch getSection(forSection: indexPath.section) {
case .sectionA:
//Get section A cell type and format as your need
//etc
}
}
``` | It is a bad practice to use NSDictionary for storing data. Create new class for section (i.e. SectionData) and row (i.e. RowData). Your ViewController (or some other data provider) will keep array of SectionData, where SectionData keeps array of RowData. RowData may contain func for handling row selection, so in didSelectRowAtindexPath you just do something like this:
```
let rowData = rowDataAtIndexPath(indexPath)
rowData.tapHandler()
```
where rowDataAtIndexPath is your defined function that gives you data for indexPath.
When you need to remove some section, just remove it from array of sections and reload tableView. |
40,128,449 | Hi I remove my ssl cert from my website. I fixed the database from showing HTTPS and remove the necessary lines from htaccess file . but for now - anyone how trying to enter to my wordpress website get an error message (because the ssl...) How can I forward the user from HTTPS TO HTTP?
htaccess below:
```
text/x-generic .htaccess ( ASCII text )
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
# <IfModule mod_rewrite.c>
# RewriteEngine On
# RewriteCond %{SERVER_PORT} 80
# RewriteRule ^(.*)$ https://www.*****.com/$1 [R,L]
# </IfModule>
<IfModule mod_headers.c>
Header add Access-Control-Allow-Origin "*"
</IfModule>
Header unset Pragma
FileETag None
Header unset ETag
## EXPIRES CACHING ##
<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType image/jpg "access 1 year"
ExpiresByType image/jpeg "access 1 year"
ExpiresByType image/gif "access 1 year"
ExpiresByType image/png "access 1 year"
ExpiresByType text/css "access 1 month"
ExpiresByType text/html "access 1 month"
ExpiresByType application/pdf "access 1 month"
ExpiresByType text/x-javascript "access 1 month"
ExpiresByType application/x-shockwave-flash "access 1 month"
ExpiresByType image/x-icon "access 1 year"
ExpiresDefault "access 1 month"
</IfModule>
## EXPIRES CACHING ##
<FilesMatch "\\.(js|css|html|htm|php|xml)$">
SetOutputFilter DEFLATE
</FilesMatch>
<IfModule mod_gzip.c>
mod_gzip_on Yes
mod_gzip_dechunk Yes
mod_gzip_item_include file \.(html?|txt|css|js|php|pl)$
mod_gzip_item_include handler ^cgi-script$
mod_gzip_item_include mime ^text/.*
mod_gzip_item_include mime ^application/x-javascript.*
mod_gzip_item_exclude mime ^image/.*
mod_gzip_item_exclude rspheader ^Content-Encoding:.*gzip.*
</IfModule>
``` | 2016/10/19 | [
"https://Stackoverflow.com/questions/40128449",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/7041592/"
] | An approach I use when creating a table where I know all the possible sections is with enums. You create an enum for each of the possible section types:
`enum SectionTypes { case sectionA, sectionB, sectionC }`
And then create a variable to hold the sections:
`var sections: [SectionTypes]`
When you have your data ready then you populate sections with the sections that needs to be displayed. I usually also make a method to help get the section:
```
func getSection(forSection: Int) -> SectionTypes {
return sections[forSection]
}
```
With this in place you can start implementing the common DataSource delegate methods:
```
func numberOfSections(in collectionView: UICollectionView) -> Int {
return sections.count
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
switch getSection(forSection: section) {
case .sectionA:
return 0 //Add the code to get the count of rows for this section
case .sectionB:
return 0
default:
return 0
}
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
switch getSection(forSection: indexPath.section) {
case .sectionA:
//Get section A cell type and format as your need
//etc
}
}
``` | I think this talk is broader than what you are seeking but he talks about it.
<https://realm.io/news/altconf-benji-encz-uikit-inside-out-declarative-programming/> |
11,460,673 | Bellow is a PHP script.
I tried to implement the Observer pattern (without MVC structure)... only basic.
The error which is encountered has been specified in a comment.
First I tried to add User objects to the UsersLibrary repository. There was a error such as User::update() does not exists or something.
Why is that error encountered? What fix should be applied and how?
```
interface IObserver {
public function update(IObservable $sender);
}
interface IObservable {
public function addObserver(IObserver $obj);
public function notify();
}
class UsersLibrary implements IObservable {
private $container;
private $contor;
//private $z;
public function __construct() {//IObserver $a) {
$this->container = array();
$this->contor = 0;
echo "<div>[constructing UsersLibrary...]</div>";
$this->addObserver(new Logger());
//$this->z = $a;
}
public function add($obj) {
echo "<div>[adding a new user...]</div>";
$this->container[$this->contor] = $obj;
$this->contor++;
$this->notify();
}
public function get($index) {
return $this->container[$index];
}
public function addObserver(IObserver $obj) {
$this->container[] = $obj;
}
public function notify() {
echo "<div>[notification in progress...]</div>";
foreach($this->container as $temp) {
//echo $temp;
#################################################################
$temp->update(); //--------ERROR
//Fatal Error: Call to a member function update() on a non-object.
#################################################################
}
//$this->container[0]->update();
//$this->z->update($this);
}
}
class User {
private $id;
private $name;
public function __construct($id, $name) {
$this->id = $id;
$this->name = $name;
}
public function getId() {
return $this->id;
}
public function getName() {
return $this->name;
}
}
class Logger implements IObserver {
public function __construct() {
echo "<div>[constructing Logger...]</div>";
}
public function update(IObservable $sender) {
echo "<div>A new user has been added.</div>";
}
}
$a = new UsersLibrary(); //new Logger());
//$a->add(new User(1, "DemoUser1"));
//$a->add(new User(2, "DemoUser2"));
$a->add("Demo");
echo $a->get(0);
//echo $a->get(0)->getName();
``` | 2012/07/12 | [
"https://Stackoverflow.com/questions/11460673",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/1393475/"
] | Your `User` class is not implementing `interface IObserver` and therefore is not forced to have the method `update()`.
You have to instantiate a `new User()` in order to add it to the `UsersLibrary`:
```
$library = new UsersLibrary();
$user = new User(1, "Demo");
$library->add($user);
```
Also, you are mixing **Users** and **Loggers** into your UsersLibrary container. Maybe think about separating the containers for them? | You are passing a string instead of an object in your `$a->add()` call. You should either pass in an object, or alter the code in UserLibrary::add() to wrap it's argument in an appropriate object (or do an object lookup of it sees a string, for instance find a user with that name).
```
$user = new User(1, "Demo");
$a = new UsersLibrary();
$a->add($user);
``` |
35,336,711 | I have this array of objects.
```
[ { geom: '{"type":"Point","coordinates":[-3.81086160022019,50.4619066354793]}' },
{ geom: '{"type":"Point","coordinates":[-4.038333333,51.17166667]}' },
{ geom: '{"type":"Point","coordinates":[-4.286666667,50.99666667]}' },
{ geom: '{"type":"Point","coordinates":[-4.006666667,51.11833333]}' },
{ geom: '{"type":"Point","coordinates":[-3.155,50.75333333]}' } ]
```
I want it without the `geom:` leaving me with
```
[ {"type":"Point","coordinates":[-3.81086160022019,50.4619066354793]},
{"type":"Point","coordinates":[-4.038333333,51.17166667]},
{"type":"Point","coordinates":[-4.286666667,50.99666667]},
{"type":"Point","coordinates":[-4.006666667,51.11833333]},
{"type":"Point","coordinates":[-3.155,50.75333333]}]
```
Can this be done with underscore? | 2016/02/11 | [
"https://Stackoverflow.com/questions/35336711",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/3346163/"
] | You can do this without `underscore` as well. You just have to loop over array and return `currentObj.geom`. Also, `currentObj.geom` is a string, so you would need `JSON.parse`
```js
var a = [ { geom: '{"type":"Point","coordinates":[-3.81086160022019,50.4619066354793]}' },
{ geom: '{"type":"Point","coordinates":[-4.038333333,51.17166667]}' },
{ geom: '{"type":"Point","coordinates":[-4.286666667,50.99666667]}' },
{ geom: '{"type":"Point","coordinates":[-4.006666667,51.11833333]}' },
{ geom: '{"type":"Point","coordinates":[-3.155,50.75333333]}' } ]
var result = a.map(function(item){
return JSON.parse(item.geom);
});
document.write("<pre>" + JSON.stringify(result,0,4) + "</pre>");
``` | As **@Rajesh** stated, there is no need for underscore here, but if you really want to use it then can just do:-
```
var data = [ { geom: '{"type":"Point","coordinates":[-3.81086160022019,50.4619066354793]}' },
{ geom: '{"type":"Point","coordinates":[-4.038333333,51.17166667]}' },
{ geom: '{"type":"Point","coordinates":[-4.286666667,50.99666667]}' },
{ geom: '{"type":"Point","coordinates":[-4.006666667,51.11833333]}' },
{ geom: '{"type":"Point","coordinates":[-3.155,50.75333333]}' } ];
var vals = _.map(data, function(obj){
return JSON.parse(obj.geom);
});
``` |
1,465,880 | This is quoted from Feynman's lectures [The Dependence of Amplitudes on Position](http://www.feynmanlectures.caltech.edu/III_16.html)
:
>
> In Chapter 13 we then proposed that the amplitudes $C(x\_n)$ should vary with time in a way described by the Hamiltonian equation. In our new notation this equation is
> $$iℏ\frac{∂C(x\_n)}{∂t}=E\_0C(x\_n)−AC(x\_n+b)−AC(x\_n−b).\tag{16.7}$$
> The last two terms on the right-hand side represent the process in which an electron at atom $(n+1)$ or at atom $(n−1)$ can feed into atom $n.$
> We found that Eq. $(16.7)$ has solutions corresponding to definite energy states, which we wrote as
> $$C(x\_n)=e^{−iEt/ℏ}e^{ikx\_n}.\tag{16.8}$$
> For the low-energy states the wavelengths are large ($k$ is small), and the energy is related to $k$ by
> $$E=(E\_0−2A)+Ak^2b^2,\tag{16.9}$$
> or, choosing our zero of energy so that $(E\_0−2A)=0$, the energy is given by Eq. $(16.1).$
> Let’s see what might happen if we were to let the lattice spacing $b$ go to zero, keeping the wave number $k$ fixed. If that is all that were to happen the last term in Eq. $(16.9)$ would just go to zero and there would be no physics. But suppose $A$ and $b$ are varied together so that as $b$ goes to zero the product $Ab^2$ is kept constant—using Eq. $(16.2)$ we will write $Ab^2$ as the constant $ℏ^2/2m\_\text{eff}.$ Under these circumstances, Eq. $(16.9)$ would be unchanged, but what would happen to the differential equation $(16.7)$?
> First we will rewrite Eq. $(16.7)$ as
> $$iℏ\frac{∂C(x\_n)}{∂t}=(E\_0−2A)C(x\_n)+A[2C(x\_n)−C(x\_n+b)−C(x\_n−b)]. \tag{16.10}$$
> For our choice of $E\_0,$ the first term drops out. Next, we can think of a continuous function $C(x)$ that goes smoothly through the proper values $C(x\_n)$ at each $x\_n.$ As the spacing $b$ goes to zero, the points $x\_n$ get closer and closer together, and (if we keep the variation of $C(x)$ fairly smooth) **the quantity in the brackets is just proportional to the second derivative of $C(x).$** We can write—as you can see by making a Taylor expansion of each term—the equality
> $$2C(x)−C(x+b)−C(x−b)≈−b^2\frac{∂^2C(x)}{∂x^2}.\tag{16.11}$$
> In the limit, then, as $b$ goes to zero, keeping $b^2A$ equal to $ℏ^2/2m\_\text{eff},$ Eq. $(16.7)$ goes over into
> $$i\hbar\frac{∂C(x)}{∂t}=-\frac{\hbar^2}{2m\_{\text{eff}}}\,
> \frac{\partial^2C(x)}{\partial x^2}.$$
>
>
>
Can anyone tell me how Feynman equated the terms in the box $2C(x)−C(x+b)−C(x−b)$ with $\frac{\partial^2C(x)}{\partial x^2}?$ How could he tell '\_the quantity in the brackets is just proportional to the second derivative of$C(x)$ \_? How did he use the Taylor expansion here? | 2015/10/05 | [
"https://math.stackexchange.com/questions/1465880",
"https://math.stackexchange.com",
"https://math.stackexchange.com/users/-1/"
] | HINT:
[Taylor's Theorem](https://en.wikipedia.org/wiki/Taylor%27s_theorem#Statement_of_the_theorem) with the Peano form of the remainder is
$$C(x\pm b)=C(x)\pm C'(x)b+\frac12 C''(x)b^2+h(x;b)b^2 \tag 1$$
where $\lim\_{b\to 0}h(x;b)=0$.
Now, add the positve and negative terms in $(1)$ and see what happens. | It can be easily proved via L'Hospital's Rule that $$\lim\_{b \to 0}\frac{C(a + b) + C(a - b) - 2C(a)}{b^{2}} = C''(a)\tag{1}$$ provided that the second derivative $C''(a)$ exists. Hence we can write $$\frac{C(a + b) + C(a - b) - 2C(a)}{b^{2}} \approx C''(a)\tag{2}$$ when $b$ is small. This is same as writing $$2C(x) - C(x + b) - C(x - b) \approx -b^{2}C''(x)\tag{3}$$ where the variable $x$ has been used in place of $a$. To prove $(1)$ let's apply L'Hospital's Rule once (and only once) to get
\begin{align}
L &= \lim\_{b \to 0}\frac{C(a + b) + C(a - b) - 2C(a)}{b^{2}}\notag\\
&= \lim\_{b \to 0}\frac{C'(a + b) - C'(a - b)}{2b}\notag\\
&= \frac{1}{2}\lim\_{b \to 0}\frac{C'(a + b) - C'(a)}{b} + \frac{C'(a - b) - C'(a)}{-b}\notag\\
&= \frac{1}{2}\{C''(a) + C''(a)\}\notag\\
&= C''(a)\notag
\end{align} |
1,465,880 | This is quoted from Feynman's lectures [The Dependence of Amplitudes on Position](http://www.feynmanlectures.caltech.edu/III_16.html)
:
>
> In Chapter 13 we then proposed that the amplitudes $C(x\_n)$ should vary with time in a way described by the Hamiltonian equation. In our new notation this equation is
> $$iℏ\frac{∂C(x\_n)}{∂t}=E\_0C(x\_n)−AC(x\_n+b)−AC(x\_n−b).\tag{16.7}$$
> The last two terms on the right-hand side represent the process in which an electron at atom $(n+1)$ or at atom $(n−1)$ can feed into atom $n.$
> We found that Eq. $(16.7)$ has solutions corresponding to definite energy states, which we wrote as
> $$C(x\_n)=e^{−iEt/ℏ}e^{ikx\_n}.\tag{16.8}$$
> For the low-energy states the wavelengths are large ($k$ is small), and the energy is related to $k$ by
> $$E=(E\_0−2A)+Ak^2b^2,\tag{16.9}$$
> or, choosing our zero of energy so that $(E\_0−2A)=0$, the energy is given by Eq. $(16.1).$
> Let’s see what might happen if we were to let the lattice spacing $b$ go to zero, keeping the wave number $k$ fixed. If that is all that were to happen the last term in Eq. $(16.9)$ would just go to zero and there would be no physics. But suppose $A$ and $b$ are varied together so that as $b$ goes to zero the product $Ab^2$ is kept constant—using Eq. $(16.2)$ we will write $Ab^2$ as the constant $ℏ^2/2m\_\text{eff}.$ Under these circumstances, Eq. $(16.9)$ would be unchanged, but what would happen to the differential equation $(16.7)$?
> First we will rewrite Eq. $(16.7)$ as
> $$iℏ\frac{∂C(x\_n)}{∂t}=(E\_0−2A)C(x\_n)+A[2C(x\_n)−C(x\_n+b)−C(x\_n−b)]. \tag{16.10}$$
> For our choice of $E\_0,$ the first term drops out. Next, we can think of a continuous function $C(x)$ that goes smoothly through the proper values $C(x\_n)$ at each $x\_n.$ As the spacing $b$ goes to zero, the points $x\_n$ get closer and closer together, and (if we keep the variation of $C(x)$ fairly smooth) **the quantity in the brackets is just proportional to the second derivative of $C(x).$** We can write—as you can see by making a Taylor expansion of each term—the equality
> $$2C(x)−C(x+b)−C(x−b)≈−b^2\frac{∂^2C(x)}{∂x^2}.\tag{16.11}$$
> In the limit, then, as $b$ goes to zero, keeping $b^2A$ equal to $ℏ^2/2m\_\text{eff},$ Eq. $(16.7)$ goes over into
> $$i\hbar\frac{∂C(x)}{∂t}=-\frac{\hbar^2}{2m\_{\text{eff}}}\,
> \frac{\partial^2C(x)}{\partial x^2}.$$
>
>
>
Can anyone tell me how Feynman equated the terms in the box $2C(x)−C(x+b)−C(x−b)$ with $\frac{\partial^2C(x)}{\partial x^2}?$ How could he tell '\_the quantity in the brackets is just proportional to the second derivative of$C(x)$ \_? How did he use the Taylor expansion here? | 2015/10/05 | [
"https://math.stackexchange.com/questions/1465880",
"https://math.stackexchange.com",
"https://math.stackexchange.com/users/-1/"
] | Let's Taylor expand the $C$ terms to second order about $x$:
$$ C(x) = C(x) $$
So far so good...
$$ C(x+b) = C(x)+\frac{\partial C}{\partial x}(x) b + \frac{1}{2}\frac{\partial^2 C}{\partial x^2}(x)b^2 + o(b^2) $$
(I'm not a fan of this notation, but there's not really another way to make it consistent with Feynman's dodgy notation.) Doing the same thing for $C(x-b)$ gives you the same thing with $b \mapsto -b$:
$$ C(x-b) = C(x)+\frac{\partial C}{\partial x}(x) b - \frac{1}{2}\frac{\partial^2 C}{\partial x^2}(x)b^2 + o(b^2) $$
Then the combination Feynman takes looks like
$$ 2C(x)-C(x+b)-C(x-b) \\
= (2C(x)-C(x)-C(x)) + b \left( -\frac{\partial C}{\partial x}(x)+\frac{\partial C}{\partial x}(x) \right) - b^2 \left( \frac{1}{2}\frac{\partial^2 C}{\partial x^2}(x) + \frac{1}{2}\frac{\partial^2 C}{\partial x^2}(x) \right) + o(b^2) \\
= -b^2\frac{1}{2}\frac{\partial^2 C}{\partial x^2}(x) + o(b^2) $$
$o(b^2)$ just means a term that goes to zero faster than $b^2$ as $b \to 0$. | It can be easily proved via L'Hospital's Rule that $$\lim\_{b \to 0}\frac{C(a + b) + C(a - b) - 2C(a)}{b^{2}} = C''(a)\tag{1}$$ provided that the second derivative $C''(a)$ exists. Hence we can write $$\frac{C(a + b) + C(a - b) - 2C(a)}{b^{2}} \approx C''(a)\tag{2}$$ when $b$ is small. This is same as writing $$2C(x) - C(x + b) - C(x - b) \approx -b^{2}C''(x)\tag{3}$$ where the variable $x$ has been used in place of $a$. To prove $(1)$ let's apply L'Hospital's Rule once (and only once) to get
\begin{align}
L &= \lim\_{b \to 0}\frac{C(a + b) + C(a - b) - 2C(a)}{b^{2}}\notag\\
&= \lim\_{b \to 0}\frac{C'(a + b) - C'(a - b)}{2b}\notag\\
&= \frac{1}{2}\lim\_{b \to 0}\frac{C'(a + b) - C'(a)}{b} + \frac{C'(a - b) - C'(a)}{-b}\notag\\
&= \frac{1}{2}\{C''(a) + C''(a)\}\notag\\
&= C''(a)\notag
\end{align} |
52,521,159 | I tried to adapt the 2d platformer character controller from this live session: <https://www.youtube.com/watch?v=wGI2e3Dzk_w&list=PLX2vGYjWbI0SUWwVPCERK88Qw8hpjEGd8>
Into a 2d top down character controller. It seemed to work but it is possible to move into colliders with some combination of keys pressed that I couldn't really find out, but it's easy to make it happen.
The thing is I don't understand how the collision detection is really working here so I don't know how to fix it. I appreciate if someone can explain how this works.
Thanks :)
This is how the player is set up:
[Player Inspector](https://i.stack.imgur.com/fb6aK.png)
**PlayerControllerTopDown2D.cs**:
```
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class PlayerControllerTopDown2D : PhysicsObject2D
{
public float maxSpeed = 7;
private SpriteRenderer spriteRenderer;
private Animator animator;
private bool facingUp, facingDown, facingLeft, facingRight;
void Awake()
{
spriteRenderer = GetComponent<SpriteRenderer>();
animator = GetComponent<Animator>();
facingUp = true;
facingDown = facingLeft = facingRight = false;
}
protected override void ComputeVelocity()
{
Vector2 move = Vector2.zero;
move.x = Input.GetAxis("Horizontal");
move.y = Input.GetAxis("Vertical");
targetVelocity = move * maxSpeed;
if (move.y > minMoveDistance && !facingUp)
{
clearOthersAndSet(0);
// sprite rotation
}
if (move.y < -minMoveDistance && !facingDown)
{
clearOthersAndSet(1);
// sprite rotation
}
if (move.x < -minMoveDistance && !facingLeft)
{
clearOthersAndSet(2);
// sprite rotation
}
if (move.x > minMoveDistance && !facingRight)
{
clearOthersAndSet(3);
// sprite rotation
}
}
void clearOthersAndSet(int x)
{
switch (x)
{
case 0;
facingUp = true;
facingDown = facingLeft = facingRight = false;
break;
case 1:
facingDown = true;
facingUp = facingLeft = facingRight = false;
break;
case 2:
facingLeft = true;
facingUp = facingDown = facingRight = false;
break;
case 3:
facingRight = true;
facingUp = facingDown = facingLeft = false;
break;
}
}
}
```
**PhysicsObject2D.cs**:
```
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class PhysicsObject2D : MonoBehaviour
{
protected Rigidbody2D rb2d;
protected Vector2 velocity;
protected Vector2 targetVelocity;
protected ContactFilter2D contactFilter;
protected RaycastHit2D[] hitBuffer = new RaycastHit2D[16];
protected List<RaycastHit2D> hitBufferList = new List<RaycastHit2D>(16);
protected const float minMoveDistance = 0.001f;
protected const float shellRadius = 0.01f;
protected bool hitSomething = false;
void OnEnable()
{
rb2d = GetComponent<Rigidbody2D>();
}
void Start()
{
contactFilter.useTriggers = false;
int layerMask = Physics2D.GetLayerCollisionMask(gameObject.layer);
contactFilter.SetLayerMask(layerMask);
contactFilter.useLayerMask = true;
}
void Update()
{
targetVelocity = Vector2.zero;
ComputeVelocity();
}
protected virtual void ComputeVelocity()
{
}
void FixedUpdate()
{
if (hitSomething)
{
targetVelocity = -targetVelocity * 5;
hitSomething = false;
}
velocity.x = targetVelocity.x;
velocity.y = targetVelocity.y;
Vector2 deltaPosition = velocity * Time.deltaTime;
Vector2 move = Vector2.right * deltaPosition.x;
Movement(move, false);
move = Vector2.up * deltaPosition.y;
Movement(move, true);
}
void Movement(Vector2 move, bool yMovement)
{
float distance = move.magnitude;
if (distance > minMoveDistance)
{
int count = rb2d.Cast(move, contactFilter, hitBuffer, distance + shellRadius);
if (count > 0)
hitSomething = true;
else
hitSomething = false;
hitBufferList.Clear();
for (int i = 0; i < count; i++)
{
hitBufferList.Add(hitBuffer[i]);
}
for (int i = 0; i < hitBufferList.Count; i++)
{
float modifiedDistance = hitBufferList[i].distance - shellRadius;
distance = modifiedDistance < distance ? modifiedDistance : distance;
}
}
rb2d.position = rb2d.position + move.normalized * distance;
}
}
``` | 2018/09/26 | [
"https://Stackoverflow.com/questions/52521159",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/10419464/"
] | simplifying, unity checks for collision each frame in a synchronized way (for the sake of frame drop compensation), if your object is moving fast (covering a great distance in a short time), there's a chance of your object pass through a wall in that exactly time gap of a collision check and another.
as well stated and tested on this [thread](https://forum.unity.com/threads/collision-detection-discrete-vs-continuous-vs-continuous-dynamic.291818/).
if your object is passing through a object, the first thing you want to change is the **collision detection mode**, when the mode is set to discrete, you're saying that the object is checking for collision in a lower rate.[](https://i.stack.imgur.com/ElHDR.jpg)
and when you set it to continuous, the object checks for collision more frequently.
[](https://i.stack.imgur.com/2gYDf.jpg)
so probably setting detection mode from "discrete" to continuous should be enough to solve your problem. | As Matheus suggested I changed the colliders mode to continuous, however the problem still happens. I found a way to make it happen for sure.
To make this work I removed line 38 of PhysicsObject2D.cs:
**targetVelocity = -targetVelocity \* 5;**
[See this image](https://i.stack.imgur.com/W1inZ.png)
In this position, I press **left + down** and the player moves **up** into the box collider. The player was not inside other colliders at the start.
When the bodies are overlaping it is then allowed to move freely inside but the movement is much slower and the directions are inverted, pressing up moves down, pressing the left arrow moves to the right. |
52,521,159 | I tried to adapt the 2d platformer character controller from this live session: <https://www.youtube.com/watch?v=wGI2e3Dzk_w&list=PLX2vGYjWbI0SUWwVPCERK88Qw8hpjEGd8>
Into a 2d top down character controller. It seemed to work but it is possible to move into colliders with some combination of keys pressed that I couldn't really find out, but it's easy to make it happen.
The thing is I don't understand how the collision detection is really working here so I don't know how to fix it. I appreciate if someone can explain how this works.
Thanks :)
This is how the player is set up:
[Player Inspector](https://i.stack.imgur.com/fb6aK.png)
**PlayerControllerTopDown2D.cs**:
```
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class PlayerControllerTopDown2D : PhysicsObject2D
{
public float maxSpeed = 7;
private SpriteRenderer spriteRenderer;
private Animator animator;
private bool facingUp, facingDown, facingLeft, facingRight;
void Awake()
{
spriteRenderer = GetComponent<SpriteRenderer>();
animator = GetComponent<Animator>();
facingUp = true;
facingDown = facingLeft = facingRight = false;
}
protected override void ComputeVelocity()
{
Vector2 move = Vector2.zero;
move.x = Input.GetAxis("Horizontal");
move.y = Input.GetAxis("Vertical");
targetVelocity = move * maxSpeed;
if (move.y > minMoveDistance && !facingUp)
{
clearOthersAndSet(0);
// sprite rotation
}
if (move.y < -minMoveDistance && !facingDown)
{
clearOthersAndSet(1);
// sprite rotation
}
if (move.x < -minMoveDistance && !facingLeft)
{
clearOthersAndSet(2);
// sprite rotation
}
if (move.x > minMoveDistance && !facingRight)
{
clearOthersAndSet(3);
// sprite rotation
}
}
void clearOthersAndSet(int x)
{
switch (x)
{
case 0;
facingUp = true;
facingDown = facingLeft = facingRight = false;
break;
case 1:
facingDown = true;
facingUp = facingLeft = facingRight = false;
break;
case 2:
facingLeft = true;
facingUp = facingDown = facingRight = false;
break;
case 3:
facingRight = true;
facingUp = facingDown = facingLeft = false;
break;
}
}
}
```
**PhysicsObject2D.cs**:
```
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class PhysicsObject2D : MonoBehaviour
{
protected Rigidbody2D rb2d;
protected Vector2 velocity;
protected Vector2 targetVelocity;
protected ContactFilter2D contactFilter;
protected RaycastHit2D[] hitBuffer = new RaycastHit2D[16];
protected List<RaycastHit2D> hitBufferList = new List<RaycastHit2D>(16);
protected const float minMoveDistance = 0.001f;
protected const float shellRadius = 0.01f;
protected bool hitSomething = false;
void OnEnable()
{
rb2d = GetComponent<Rigidbody2D>();
}
void Start()
{
contactFilter.useTriggers = false;
int layerMask = Physics2D.GetLayerCollisionMask(gameObject.layer);
contactFilter.SetLayerMask(layerMask);
contactFilter.useLayerMask = true;
}
void Update()
{
targetVelocity = Vector2.zero;
ComputeVelocity();
}
protected virtual void ComputeVelocity()
{
}
void FixedUpdate()
{
if (hitSomething)
{
targetVelocity = -targetVelocity * 5;
hitSomething = false;
}
velocity.x = targetVelocity.x;
velocity.y = targetVelocity.y;
Vector2 deltaPosition = velocity * Time.deltaTime;
Vector2 move = Vector2.right * deltaPosition.x;
Movement(move, false);
move = Vector2.up * deltaPosition.y;
Movement(move, true);
}
void Movement(Vector2 move, bool yMovement)
{
float distance = move.magnitude;
if (distance > minMoveDistance)
{
int count = rb2d.Cast(move, contactFilter, hitBuffer, distance + shellRadius);
if (count > 0)
hitSomething = true;
else
hitSomething = false;
hitBufferList.Clear();
for (int i = 0; i < count; i++)
{
hitBufferList.Add(hitBuffer[i]);
}
for (int i = 0; i < hitBufferList.Count; i++)
{
float modifiedDistance = hitBufferList[i].distance - shellRadius;
distance = modifiedDistance < distance ? modifiedDistance : distance;
}
}
rb2d.position = rb2d.position + move.normalized * distance;
}
}
``` | 2018/09/26 | [
"https://Stackoverflow.com/questions/52521159",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/10419464/"
] | 1) Set Collision Detection Mode to "Continuous" for important entities like the player.
2) Use `rb2d.MovePosition();` for movement.
3) Don't call `rb2d.MovePosition()` more than once in a frame.
these 3 combined should make your movement and collision detection work fine.
I wont question the rest of your code, but here are my generalized suggestions
```
Vector2 MovementDirection; //Assuming this is assigned in Update() from Input
public float MaxSpeed;
void FixedUpdate()
{
Vector2 finalMoveDir = MovementDirection.normalized * MaxSpeed;
//
//any additional changes to the final direction should happen here
//
finalMoveDir *= Time.deltaTime;
rb2d.MovePosition((Vector2)transform.position + finalMoveDir);
}
``` | As Matheus suggested I changed the colliders mode to continuous, however the problem still happens. I found a way to make it happen for sure.
To make this work I removed line 38 of PhysicsObject2D.cs:
**targetVelocity = -targetVelocity \* 5;**
[See this image](https://i.stack.imgur.com/W1inZ.png)
In this position, I press **left + down** and the player moves **up** into the box collider. The player was not inside other colliders at the start.
When the bodies are overlaping it is then allowed to move freely inside but the movement is much slower and the directions are inverted, pressing up moves down, pressing the left arrow moves to the right. |
34,633,844 | I need to create a XAML `textbox` immediately after another `textbox` using code-behind. Maybe something like this:
Before
```
<StackPanel>
<TextBox Name="TextBox1"/>
<TextBox Name="TextBox2"/>
<TextBox Name="TextBox3"/>
</StackPanel>
```
After
```
<StackPanel>
<TextBox Name="TextBox1"/>
<TextBox Name="TextBox2"/>
<TextBox Name="InsertedTextBox"/> <!--This textbox was inserted after 'TextBox2'-->
<TextBox Name="TextBox3"/>
</StackPanel>
```
I have the name of the `textbox` I wish to insert the other `textbox` after. May I know how I can insert a `textbox` after another `textbox` which I know the name of?
Note: I am programming for Universal Windows.
Thanks in advance. | 2016/01/06 | [
"https://Stackoverflow.com/questions/34633844",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/5719584/"
] | You need to name the `StackPanel` to reference it in code, and you need the index of the preceding `TextBox`:
```
var index = this.stackPanel1.Children.IndexOf(TextBox2);
this.stackPanel1.Children.Insert(index + 1, new TextBox { Name = "InsertedTextBox" });
``` | You could try this, note I've given the `StackPanel` a name.
```
// Where 2 is the index.
this.StackPanel1.Children.Insert(2, new TextBox());
``` |
17,266,818 | Trying to split the `http://` from `http://url.com/xxyjz.jpg` with the following:
```
var imgUrl = val['url'].split(/(^http:\/\/)/);
```
And, even though I can get my desired result with the code above, I get some extra parameters that I would like not to have.
Output:
>
> ["", "http://", "url.com/xxyjz.jpg"]
>
>
>
So, the question is: What am I doing wrong that I get the extra `""`, besides the `"http://"`? | 2013/06/24 | [
"https://Stackoverflow.com/questions/17266818",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/971392/"
] | You could use `match` instead of `split`:
```
var matches = str.match(/(http:\/\/)(.*)/).slice(1);
```
That will give you the array you want. | you can just reference the index:
```
var a=str.match(/http:\/\/(.*)/)[1]
``` |
433,810 | I have trouble displaying an abbreviation nicely.
Removing largesmallcaps is a small improvement, but looks really bad in full document. I want normal numbers in the rest of the document.
How can I make the zero appear the correct size and differentiate it nicely from the O?
MWE:
```
\documentclass{article}
\usepackage[largesmallcaps]{kpfonts}
\begin{document}
1234567890
\oldstylenums{1234567890}
\textsc{lod}\oldstylenums{0}
\textsc{lod0}
\end{document}
```
[](https://i.stack.imgur.com/r0JDT.png) | 2018/05/28 | [
"https://tex.stackexchange.com/questions/433810",
"https://tex.stackexchange.com",
"https://tex.stackexchange.com/users/81219/"
] | This can be achieved by combining `multirow` from the eponymous package with `rotatebox` from the `graphicx` package as follows:
```
\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{booktabs}
\usepackage{graphicx}
\usepackage{multirow}
\begin{document}
\begin{table}[!ht]
\centering
\begin{tabular}{lllll}
\toprule
& & Surveillance de & Fonctionnalité & Feedback \\
\midrule
\rotatebox[origin=c]{90}{AVQ} &Verre & Indépendance lors d'AVQs & & \\
\midrule
\multirow{2}{*}{\rotatebox[origin=c]{90}{Main}} &Osselet & Dextérité & & \\
&Cube & Préhension globale de la main & & \\
\midrule
\multirow{2}{*}{\rotatebox[origin=c]{90}{Bras}} &Bracelet & Activité motrice du bras & & \\
&Pull-over & Extension du coude & & \\
\bottomrule
\end{tabular}
\caption{Récapitulatif des fonctionnalités de chaque objet}
\label{recap_fonctionnalites}
\end{table}
\end{document}
```
[](https://i.stack.imgur.com/XiP3S.png)
Please note that I have additionally removed the vertical line as `booktabs` horizontal rules are not intended to be used in combination with vertical lines. | I propose this variant, with `intersecting` horizontal and a (`thicker`) vertical rules, an adjustment of the position of the vertical text, and some padding of rows:
```
\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[svgnames, table]{xcolor}
\usepackage{booktabs}
\usepackage{rotating}
\usepackage{multirow, makecell}
\begin{document}
\begin{table}[!ht]
\centering
\aboverulesep=0pt
\belowrulesep=0pt
\setcellgapes{4pt}\makegapedcells
\begin{tabular}{ll!{\color{Gainsboro!60!Lavender}\vrule width0.4em}lll}
\toprule
& & Surveillance de & Fonctionnalité & Feedback \\
\arrayrulecolor{Gainsboro!60!Lavender}\midrule[0.1em]
\rotatebox[origin=c]{90}{AVQ} &Verre & Indépendance lors d'AVQs & & \\
\midrule
\multirowcell{2}[-0.4ex]{\rotatebox[origin=c]{90}{Main}} &Osselet & Dextérité & & \\
&Cube & Préhension globale de la main & & \\
\midrule
\multirowcell{2}[-0.3ex]{\rotatebox[origin=c]{90}{Bras}} &Bracelet & Activité motrice du bras & & \\
&Pull-over & Extension du coude & & \\
\arrayrulecolor{black}\bottomrule
\end{tabular}
\caption{Récapitulatif des fonctionnalités de chaque objet}
\label{recap_fonctionnalites}
\end{table}
\end{document}
```
[](https://i.stack.imgur.com/Dmzr5.png) |
13,074,250 | I am trying to display the correct button and link depending on what device the user browses to a page on. If android display android app store button if ios display apple store button.
I cannot seem to get it to swap at all even though im making the function default to swap it from android to apple button.
Here is the code:
```
<html>
<head>
<script type="text/javascript">
var uagent = navigator.userAgent.toLowerCase();
var apple = "/images/ios.jpg";
var android = "/images/android.jpg"
function DetectDevice() {
var but = document.getElementById("AppButton");
if(useragent.search("iphone") || useragent.search("ipod") || useragent.search("ipad")) {
toswap.src = apple;
alert("apple");
} else if(useragent.search("android")) {
toswap.src = android;
alert("android");
}
but.src = apple;
}
DetectDevice();
</script>
<title>Device Detection</title>
</head>
<div id="butttons">
<img src="images/android.jpg" name = "AppButton" id="AppButton"/>
</div>
``` | 2012/10/25 | [
"https://Stackoverflow.com/questions/13074250",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/1775052/"
] | Keep in mind, I do NOT program gmp, but a tail-dynamic buffer in a struct is usually implemented something like this (adapted to how I think you want to use it):
```
typedef struct
{
size_t length; //length of the array
size_t numbits; //number of bits allocated per val in vals
mpz_t vals[1]; //flexible array to hold some number of mpz_t array
} CoolArray;
```
Allocation strategy, knowing the the number of values and bit-depth, would be:
```
CoolArray* allocArray(size_t length, size_t numbits)
{
CoolArray *p = malloc(sizeof(*p) + sizeof(mpz_t)*length);
p->length = length;
p->numbits = numbits;
mpz_array_init(p->vals, length, numbits);
return p;
}
```
Freeing it (just a wrapper for free(), but you may need to do some gmp-cleanup I'm unfamiliar with):
```
void freeArray(CoolArray **pp)
{
if (*pp)
{
free(*pp);
*pp = NULL;
}
}
```
Using it:
```
CoolArray *pca = allocArray(length, numbits);
```
Freeing it when done:
```
freeArray(&pca);
```
These are just ideas, but maybe you can get something from them. | If you're using a flexible array member, you need to allocate the struct in one go:
```
CoolArray *array = malloc(sizeof(CoolArray) + length * sizeof(mpz_t));
mpz_array_init(array->vals, length, numbits);
``` |
112,536 | I found myself in an interesting puzzle. Here is the simplified version:
I have a flight from A to C, connecting through B. I decide that from B I actually want to go to D, so I buy a separate ticket for that journey\*. The B-C and B-D flights are around the same time and with the same airline\*\*. Will there be a problem with checking in to B-D, given that at that point I will already be checked in on their system to the whole trip A-C, including the leg B-C? No luggage is involved.
Some extra information:
(\*) Every leg is relatively short within Europe, on economy fare. In particular, changing the A-C ticket to A-D would likely be pricier.
(\*\*) The B-D trip could be done with another airline. Does this change the answer? | 2018/04/06 | [
"https://travel.stackexchange.com/questions/112536",
"https://travel.stackexchange.com",
"https://travel.stackexchange.com/users/62048/"
] | **No**, there won't be any problem. Separate bookings are separate bookings and don't affect each other, even on the same airline.
I will note, however, that if you make a habit of buying A-B-C tickets and getting off at B, and give your frequent flyer number every time, the airline will eventually get grumpy. However, doing this once or twice is fine. | 1. It's unlikely but not impossible that you will get problems at check in. This can be interpreted as you cancelling the "B-C" leg, which incurs a change fee (as stated in the contract of carriage). It sounds insane, but airlines want you to pay for not taking a flight that you have already paid for. They can enforce this if they detect it
2. You need enough time. Depending on the airport and airline, you may have to leave the secure area, check in, and then go through security again. In many cases check in closes 1 hour before departure, which may be more than your connection time.
3. Any return flights from C to A would get cancelled by the airline. |
112,536 | I found myself in an interesting puzzle. Here is the simplified version:
I have a flight from A to C, connecting through B. I decide that from B I actually want to go to D, so I buy a separate ticket for that journey\*. The B-C and B-D flights are around the same time and with the same airline\*\*. Will there be a problem with checking in to B-D, given that at that point I will already be checked in on their system to the whole trip A-C, including the leg B-C? No luggage is involved.
Some extra information:
(\*) Every leg is relatively short within Europe, on economy fare. In particular, changing the A-C ticket to A-D would likely be pricier.
(\*\*) The B-D trip could be done with another airline. Does this change the answer? | 2018/04/06 | [
"https://travel.stackexchange.com/questions/112536",
"https://travel.stackexchange.com",
"https://travel.stackexchange.com/users/62048/"
] | **No**, there won't be any problem. Separate bookings are separate bookings and don't affect each other, even on the same airline.
I will note, however, that if you make a habit of buying A-B-C tickets and getting off at B, and give your frequent flyer number every time, the airline will eventually get grumpy. However, doing this once or twice is fine. | There might be a big problem with any checked-in bag. If this is all with the same airline, your bag might be checked through to destination C, with no opportunity to retrieve it at the intermediate stop B. |
112,536 | I found myself in an interesting puzzle. Here is the simplified version:
I have a flight from A to C, connecting through B. I decide that from B I actually want to go to D, so I buy a separate ticket for that journey\*. The B-C and B-D flights are around the same time and with the same airline\*\*. Will there be a problem with checking in to B-D, given that at that point I will already be checked in on their system to the whole trip A-C, including the leg B-C? No luggage is involved.
Some extra information:
(\*) Every leg is relatively short within Europe, on economy fare. In particular, changing the A-C ticket to A-D would likely be pricier.
(\*\*) The B-D trip could be done with another airline. Does this change the answer? | 2018/04/06 | [
"https://travel.stackexchange.com/questions/112536",
"https://travel.stackexchange.com",
"https://travel.stackexchange.com/users/62048/"
] | **No**, there won't be any problem. Separate bookings are separate bookings and don't affect each other, even on the same airline.
I will note, however, that if you make a habit of buying A-B-C tickets and getting off at B, and give your frequent flyer number every time, the airline will eventually get grumpy. However, doing this once or twice is fine. | I would not count on being able to do this with the same airline. Many airlines implement [revenue protection](http://www.navitaire.com/Styles/Images/PDFs/New%20Skies%20Revenue%20Protection.pdf) systems that can automatically [cancel](https://thepointsguy.com/2017/08/illegal-book-2-flights-cancel-1) duplicate bookings. Since it's not physically possible to take all the flights you've booked, the airline may detect that and cancel one of your bookings.
There may be a higher chance of success if you use different airlines. |
112,536 | I found myself in an interesting puzzle. Here is the simplified version:
I have a flight from A to C, connecting through B. I decide that from B I actually want to go to D, so I buy a separate ticket for that journey\*. The B-C and B-D flights are around the same time and with the same airline\*\*. Will there be a problem with checking in to B-D, given that at that point I will already be checked in on their system to the whole trip A-C, including the leg B-C? No luggage is involved.
Some extra information:
(\*) Every leg is relatively short within Europe, on economy fare. In particular, changing the A-C ticket to A-D would likely be pricier.
(\*\*) The B-D trip could be done with another airline. Does this change the answer? | 2018/04/06 | [
"https://travel.stackexchange.com/questions/112536",
"https://travel.stackexchange.com",
"https://travel.stackexchange.com/users/62048/"
] | There might be a big problem with any checked-in bag. If this is all with the same airline, your bag might be checked through to destination C, with no opportunity to retrieve it at the intermediate stop B. | 1. It's unlikely but not impossible that you will get problems at check in. This can be interpreted as you cancelling the "B-C" leg, which incurs a change fee (as stated in the contract of carriage). It sounds insane, but airlines want you to pay for not taking a flight that you have already paid for. They can enforce this if they detect it
2. You need enough time. Depending on the airport and airline, you may have to leave the secure area, check in, and then go through security again. In many cases check in closes 1 hour before departure, which may be more than your connection time.
3. Any return flights from C to A would get cancelled by the airline. |
112,536 | I found myself in an interesting puzzle. Here is the simplified version:
I have a flight from A to C, connecting through B. I decide that from B I actually want to go to D, so I buy a separate ticket for that journey\*. The B-C and B-D flights are around the same time and with the same airline\*\*. Will there be a problem with checking in to B-D, given that at that point I will already be checked in on their system to the whole trip A-C, including the leg B-C? No luggage is involved.
Some extra information:
(\*) Every leg is relatively short within Europe, on economy fare. In particular, changing the A-C ticket to A-D would likely be pricier.
(\*\*) The B-D trip could be done with another airline. Does this change the answer? | 2018/04/06 | [
"https://travel.stackexchange.com/questions/112536",
"https://travel.stackexchange.com",
"https://travel.stackexchange.com/users/62048/"
] | There might be a big problem with any checked-in bag. If this is all with the same airline, your bag might be checked through to destination C, with no opportunity to retrieve it at the intermediate stop B. | I would not count on being able to do this with the same airline. Many airlines implement [revenue protection](http://www.navitaire.com/Styles/Images/PDFs/New%20Skies%20Revenue%20Protection.pdf) systems that can automatically [cancel](https://thepointsguy.com/2017/08/illegal-book-2-flights-cancel-1) duplicate bookings. Since it's not physically possible to take all the flights you've booked, the airline may detect that and cancel one of your bookings.
There may be a higher chance of success if you use different airlines. |
18,456,454 | we have a client application that plays flash files (.swf). This works on all other mobiles except iphone as Apple doesn't support Flash. Is there any workaround to play these flash files in iphone using HTML5 or any other tweaking? Since there aren't any answers to this question recently, I am submiting this question. | 2013/08/27 | [
"https://Stackoverflow.com/questions/18456454",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/2682102/"
] | No, there is no way to display a Flash file (SWF) in the iPhone browser.
If you have access to the source of the Flash files in the application, it may be possible to export them as HTML5 from the Flash builder. There's no way to do this conversion just from the SWFs, though.
As an aside: your application won't work on many newer smartphones either - under Android, Adobe has dropped support for the Flash plugin on current versions of the OS, and it's not supported at all on current versions of Windows Mobile or Blackberry OS. Sites which depend on Flash content are effectively unusable on mobile at this point. | * **using external browser:**
There is a browser called **photon** which plays *flash videos and games* on ios devices without any need to jailbreak open this browser with the web url using custom app url scheme
* **using html5 conversion tools:**
Use *google swiffy* or *Adobe wallaby* and open the HTML page using uiwebview
* **native app**
Using *Adobe air sdk* you could play local flash videos natively
Click [here](https://stackoverflow.com/a/19167057/730807) to see detailed answer that compares these approaches and too see main links to these approaches |
32,785,066 | I'm trying to read some French character from the file but some symbols comes if letter contains à é è.
Can anyone guide me how to get actual character of the file.
Here is my main method
```
public static void main(String args[]) throws IOException
{
char current,org;
//String strPath = "C:/Documents and Settings/tidh/Desktop/BB/hhItem01_2.txt";
String strPath = "C:/Documents and Settings/tidh/Desktop/hhItem01_1.txt";
InputStream fis;
fis = new BufferedInputStream(new FileInputStream(strPath));
while (fis.available() > 0) {
current= (char) fis.read(); // to read character
// from file
int ascii = (int) current; // to get ascii for the
// character
org = (char) (ascii);
System.out.println(org);
}
``` | 2015/09/25 | [
"https://Stackoverflow.com/questions/32785066",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/4485283/"
] | You're trying to read UTF-8 character actually using ASCII. Here's an example of how to implement your feature:
```
public class Test {
private static final FILE_PATH = "c:\\temp\\test.txt";
public static void main(String[] args){
try {
File fileDir = new File(FILE_PATH);
BufferedReader in = new BufferedReader(
new InputStreamReader(
new FileInputStream(fileDir), "UTF8"));
String str;
while ((str = in.readLine()) != null) {
System.out.println(str);
}
in.close();
}
catch (UnsupportedEncodingException e)
{
System.out.println(e.getMessage());
}
catch (IOException e)
{
System.out.println(e.getMessage());
}
catch (Exception e)
{
System.out.println(e.getMessage());
}
}
}
```
Reference: [How to read UTF-8 encoded data from a file](https://www.mkyong.com/java/how-to-read-utf-8-encoded-data-from-a-file-java/) | The following assumes the text is in Windows Latin-1, but I have added alternatively UTF-8.
```
private static final String FILE_PATH = "c:\\temp\\test.txt";
Path path = Paths.get(FILE_PATH);
//Charset charset = StandardCharset.ISO_8859_1;
//Charset charset = StandardCharset.UTF_8;
Charset charset = Charset.forName("Windows-1252");
try (BufferedReader in = Files.newBufferedReader(path, charset)) {
String line;
while ((line = in.readLine()) != null) {
System.out.println(line);
}
}
```
The String `line` will contain the text in Unicode. It now depends whether System.out can represent that Unicode in your system encoding, using a conversion from Unicode.
```
System.out.println("My encoding is: " + System.getProperty("file.encoding"));
```
However if you picked the correct encoding, at most one `?` per special char. If you seem more per special char, use UTF-8 - a multi-byte encoding.
Pick a Unicode capable font too for the console.
A check for the having got `é` is:
```
String e = "\u00e9";
String s = new String(Files.readAllBytes(path), charset);
System.out.println("Contains e´ : " + s.contains(e));
```
---
***After comment:***
Better use Files.newBufferedReader *(which I corrected above)* as that can do the following.
```
try (BufferedReader in = new BufferedReader(
new InputStreamReader(
new FileInputStream(file), charset))) {
```
This buffers for faster reading, and the InputStreamReader uses a binary data InputStream plus an charset to convert it to (Unicode) of a Reader. |
32,785,066 | I'm trying to read some French character from the file but some symbols comes if letter contains à é è.
Can anyone guide me how to get actual character of the file.
Here is my main method
```
public static void main(String args[]) throws IOException
{
char current,org;
//String strPath = "C:/Documents and Settings/tidh/Desktop/BB/hhItem01_2.txt";
String strPath = "C:/Documents and Settings/tidh/Desktop/hhItem01_1.txt";
InputStream fis;
fis = new BufferedInputStream(new FileInputStream(strPath));
while (fis.available() > 0) {
current= (char) fis.read(); // to read character
// from file
int ascii = (int) current; // to get ascii for the
// character
org = (char) (ascii);
System.out.println(org);
}
``` | 2015/09/25 | [
"https://Stackoverflow.com/questions/32785066",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/4485283/"
] | You're trying to read UTF-8 character actually using ASCII. Here's an example of how to implement your feature:
```
public class Test {
private static final FILE_PATH = "c:\\temp\\test.txt";
public static void main(String[] args){
try {
File fileDir = new File(FILE_PATH);
BufferedReader in = new BufferedReader(
new InputStreamReader(
new FileInputStream(fileDir), "UTF8"));
String str;
while ((str = in.readLine()) != null) {
System.out.println(str);
}
in.close();
}
catch (UnsupportedEncodingException e)
{
System.out.println(e.getMessage());
}
catch (IOException e)
{
System.out.println(e.getMessage());
}
catch (Exception e)
{
System.out.println(e.getMessage());
}
}
}
```
Reference: [How to read UTF-8 encoded data from a file](https://www.mkyong.com/java/how-to-read-utf-8-encoded-data-from-a-file-java/) | the specific encoding for french give by IBM is CP1252 (preferred because run on all operating system).
Regards,
A frenchy guy |
32,785,066 | I'm trying to read some French character from the file but some symbols comes if letter contains à é è.
Can anyone guide me how to get actual character of the file.
Here is my main method
```
public static void main(String args[]) throws IOException
{
char current,org;
//String strPath = "C:/Documents and Settings/tidh/Desktop/BB/hhItem01_2.txt";
String strPath = "C:/Documents and Settings/tidh/Desktop/hhItem01_1.txt";
InputStream fis;
fis = new BufferedInputStream(new FileInputStream(strPath));
while (fis.available() > 0) {
current= (char) fis.read(); // to read character
// from file
int ascii = (int) current; // to get ascii for the
// character
org = (char) (ascii);
System.out.println(org);
}
``` | 2015/09/25 | [
"https://Stackoverflow.com/questions/32785066",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/4485283/"
] | You're trying to read UTF-8 character actually using ASCII. Here's an example of how to implement your feature:
```
public class Test {
private static final FILE_PATH = "c:\\temp\\test.txt";
public static void main(String[] args){
try {
File fileDir = new File(FILE_PATH);
BufferedReader in = new BufferedReader(
new InputStreamReader(
new FileInputStream(fileDir), "UTF8"));
String str;
while ((str = in.readLine()) != null) {
System.out.println(str);
}
in.close();
}
catch (UnsupportedEncodingException e)
{
System.out.println(e.getMessage());
}
catch (IOException e)
{
System.out.println(e.getMessage());
}
catch (Exception e)
{
System.out.println(e.getMessage());
}
}
}
```
Reference: [How to read UTF-8 encoded data from a file](https://www.mkyong.com/java/how-to-read-utf-8-encoded-data-from-a-file-java/) | You can download one jar file for Apache Commons IO and try to implement it by reading each line rather than reading char by char.
```
List<String> lines = IOUtils.readLines(fis, "UTF8");
for (String line: lines) {
dbhelper.addDataRecord(line + ",'" + strCompCode + "'");
}
``` |
Subsets and Splits