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Symfony2: Slow page loads. <p>I am attempting to setup Symfony2 on an Ubuntu virtual host. However even the simple hello world page is taking around 7-8 seconds to load. I have tried running other applications such as PhpMyAdmin and they are running fine but i cannot figure out why symfony is taking so long to load.</p>
<p>Here are some webgrind results: <img src="https://i.stack.imgur.com/JZKsj.png" alt="Web Grind Results" /></p>
<p>Im sorry i cant provide any more information at the moment but im not sure where to look. Thanks in advance.</p>
<p>Daniel</p>
| 0non-cybersec
| Stackexchange | 159 | 565 |
SQL Server fulltext_semantic_languages. <p>When trying to install <a href="http://blogs.msdn.com/b/sqlfts/archive/2011/07/21/introducing-fulltext-statistical-semantic-search-in-sql-server-codename-denali-release.aspx" rel="nofollow">a semantic search example</a>, I'm running into a problem. </p>
<p>There are some steps in the example to check if the 'new' Semantic Search and Full Text Search are installed. </p>
<p>Executing the following T-SQL code returns the version '11.0.1153.1.1' of the semantic database. </p>
<pre><code>/* Verify the registration is succeeded */
SELECT * FROM sys.fulltext_semantic_language_statistics_database;
GO
</code></pre>
<p>And...the following T-SQL code returns 1, which indicates that Full-Text Search and Semantic Search are installed.</p>
<pre><code>/* Check if Full-Text Search and Semantic Search are installed*/
SELECT SERVERPROPERTY('IsFullTextInstalled');
GO
</code></pre>
<p>I also registered the 'language_statistics_db'. </p>
<pre><code>/* Register Language Statistics Database */
EXEC sp_fulltext_semantic_register_language_statistics_db 'semanticsdb';
GO
</code></pre>
<p>I'm executing the following T-SQL code to verify if the languages are installed correctly <em>(this is were something odd happens)</em>. </p>
<pre><code>/* Check available languages for statistical semantic extraction */
SELECT * FROM sys.fulltext_semantic_languages;
GO
</code></pre>
<p>This statement returns no rows, indicating that there are no languages installed. I tried reinstalling the database(s) but with no effect. </p>
<p>Can someone point out to me were I made a mistake?</p>
<p><strong>UPDATE</strong>: After unregistering the semantic_language database and registering it using 'master' it worked. No idea why this worked. <strong><em>Why? Someone?</em></strong></p>
<p>The code that worked for me:</p>
<pre><code>/ * Unregistar language db */
EXEC sp_fulltext_semantic_unregister_language_statistics_db
GO
</code></pre>
<p>And registering: </p>
<pre><code>/ * register_language db */
Use master
EXEC sp_fulltext_semantic_register_language_statistics_db
GO
</code></pre>
| 0non-cybersec
| Stackexchange | 643 | 2,128 |
Subfigure float - caption above, and how to break figure over two pages. <p>Firstly, thanks a lot in advance for your help with this problem. I've looked long and hard but not found a solution anywhere. I am writing my PhD thesis in Lyx and love how it makes the formatting so smart and easy, but I am having real trouble with some of my figures. I have three things I would like to achieve:</p>
<p>1) I would like to make figures with several subfloats (to show the same combination of an image and a graph in each. (I'll attach an example to this email). It really is valuable to have all three subfloats under the same single figure heading.
The problem is that only two of my three floats fit on a page and the third one is started but gets lost off the bottom. I don't want to make the figures smaller so they fit. Can I persuade Lyx to split the figure over two pages (a bit like it does with long tables)?</p>
<p>2) I would like the captions of the subfigures ABOVE the figures. </p>
<p>3) I would like the gap between the subfigure legends and the images to be bigger (you can see how squashed up they are).</p>
<p>I'm using the following in my document preamble to justify the labels on the left.</p>
<pre><code>\usepackage{caption}
\captionsetup{labelfont=bf,format=plain,indention=0cm,
justification=raggedright,singlelinecheck=false}
</code></pre>
<p>I tried to upload a pdf of what happens to the figure but it took too long so perhaps you can take it on trust that the bottom of the figure and main figure legend disappears off the end of the page.</p>
| 0non-cybersec
| Stackexchange | 422 | 1,582 |
Database design for products with bundles of products. <p>I am building a database system for my retail business. I have set some tables which are:</p>
<ul>
<li>Product</li>
<li>Purchase</li>
<li>Sales</li>
<li>Balance</li>
</ul>
<p>All are connected one another and are able to show my inventory level.</p>
<p>The problem I am having is I also sell bundles of products - that have different prices than their individual prices.<br>
Example: I sell an orange for $1, an apple for $1.2; I sell fruit package 1 (2 oranges and 2 apples) for $3.8, package 2 (4 oranges and 4 apples) for $7.</p>
<p>Is there a right way how to create relationship for these product bundles?</p>
<p>PS: I am using FileMaker Pro creating this.</p>
| 0non-cybersec
| Stackexchange | 224 | 729 |
Can not transform code with babel transform with config file. <p>This is the config file:</p>
<pre><code>{
"presets": [
"@babel/preset-env"
],
"plugins": [
"@babel/plugin-transform-modules-commonjs"
]
}
</code></pre>
<p>This is the command:</p>
<pre><code>npx babel src/* --out-dir build
</code></pre>
<p>The CLI output is</p>
<pre><code>src/script.js -> build\src\script.js
</code></pre>
<p>The output script file is identical to the input script file.</p>
<hr />
<p>This is the node.js file:</p>
<pre class="lang-js prettyprint-override"><code>const babel = require('@babel/core');
const fs = require('fs');
fs.writeFileSync(
'build/index.js',
babel.transformFileSync(
'src/index.js',
{
plugins: ["@babel/plugin-transform-modules-commonjs"]
}
).code
);
</code></pre>
<p>The output script file's content is what is expected.</p>
<hr />
<p>I used this as input:</p>
<pre><code>const test = 0;
export default { test };
</code></pre>
<p>This is the output from the CLI command shown above.</p>
<pre><code>const test = 0;
export default { test };
</code></pre>
<p>This is the output from the NodeJS file shown above (which is my expected output from the CLI).</p>
<pre><code>"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports["default"] = void 0;
var test = 0;
var _default = {
test: test
};
exports["default"] = _default;
</code></pre>
<hr />
<p><strong>Q:</strong> Can you you babel CLI to transform code?</p>
| 0non-cybersec
| Stackexchange | 566 | 1,622 |
Laravel changes created_at on update. <p>I found <a href="https://stackoverflow.com/questions/31842470/laravel-updating-row-changes-created-at-column">this answer</a> on the subject, but it doesn't work for me.</p>
<p>So, I make an entry in the database:</p>
<pre><code>// Write lead to database
$lead = Lead::create($lead_data);
</code></pre>
<p>And the timestamps look like this, which is good:</p>
<pre><code>| 2016-01-08 10:34:15 | 2016-01-08 10:34:15 |
</code></pre>
<p>But then I make a request to an external server, and I need to update the row:</p>
<pre><code>$lead->user_id = $response['user_id'];
$lead->broker_id = $response['broker_id'];
$lead->save();
</code></pre>
<p>and the created_at field gets changed:</p>
<pre><code>| 2016-01-08 04:34:17 | 2016-01-08 10:34:17 |
</code></pre>
<p>How do I solve this problem?</p>
<p><strong>EDIT</strong></p>
<p>I need a solution that would just modify the behavior without dropping columns or resetting migrations. The fix has to be performed on a live database without touching the data. As suggested below, I tried the following migration:</p>
<pre><code>$table->datetime('created_at')->default(DB::raw('CURRENT_TIMESTAMP'))->change();
</code></pre>
<p>but nothing happens. The created_at field still gets modified on update.</p>
| 0non-cybersec
| Stackexchange | 456 | 1,317 |
How to use spot instance with amazon elastic beanstalk?. <p>I have one infra that use amazon elastic beanstalk to deploy my application.
I need to scale my app adding some spot instances that EB do not support.</p>
<p>So I create a second autoscaling from a launch configuration with spot instances.
The autoscaling use the same load balancer created by beanstalk.</p>
<p>To up instances with the last version of my app, I copy the user data from the original launch configuration (created with beanstalk) to the launch configuration with spot instances (created by me).</p>
<p>This work fine, but:</p>
<ol>
<li><p>how to update spot instances that have come up from the second autoscaling when the beanstalk update instances managed by him with a new version of the app?</p>
</li>
<li><p>is there another way so easy as, and elegant, to use spot instances and enjoy the benefits of beanstalk?</p>
</li>
</ol>
<p><strong>UPDATE</strong></p>
<p>Elastic Beanstalk add support to spot instance since 2019... see:
<a href="https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html</a></p>
| 0non-cybersec
| Stackexchange | 349 | 1,234 |
Looking for a good exercise to help me get better at Multithreading. <p>I think of myself as a pretty decent developer, however when it comes to multithreading I'm a total n00b. I mean the only multithreading I've done at work was the very basic stuff like spawning off multiple threads using the ThreadPool to do some background work. No synchronization was necessary, and there was never any need to create threads manually.</p>
<p>So, my question is this; I want to write some application that will need to be heavily multithreaded and that will need to do all of the advanced things like synchronization etc.. I just can't think of anything to write. I've thought of maybe trying to write my own ThreadPool, but I think I need to learn to walk before I can run. So what ideas can anyone suggest? It doesn't have to have any real world useage, it can be totally pointless and worthless, but I just want to get better. I've read tons of articles and tutorials on all the theory, but the only way to REALLY get better is by doing. So, any ideas?</p>
| 0non-cybersec
| Stackexchange | 246 | 1,052 |
Pytorch saving model UserWarning: Couldn't retrieve source code for container of type Network. <p>When saving model in Pytorch by using:</p>
<pre><code>torch.save(model, 'checkpoint.pth')
</code></pre>
<p>I get the following warning:</p>
<blockquote>
<p>/opt/conda/lib/python3.6/site-packages/torch/serialization.py:193:
UserWarning: Couldn't retrieve source code for container of type
Network. It won't be checked for correctness upon loading. "type " +
obj.<strong>name</strong> + ". It won't be checked "</p>
</blockquote>
<p>When I load it I get the following error:</p>
<pre><code>state_dict = torch.load('checkpoint_state_dict.pth')
model = torch.load('checkpoint.pth')
model.load_state_dict(state_dict)
AttributeError Traceback (most recent call last)
<ipython-input-2-6a79854aef0f> in <module>()
2 state_dict = torch.load('checkpoint_state_dict.pth')
3 model = 0
----> 4 model = torch.load('checkpoint.pth')
5 model.load_state_dict(state_dict)
/opt/conda/lib/python3.6/site-packages/torch/serialization.py in load(f, map_location, pickle_module)
301 f = open(f, 'rb')
302 try:
--> 303 return _load(f, map_location, pickle_module)
304 finally:
305 if new_fd:
/opt/conda/lib/python3.6/site-packages/torch/serialization.py in _load(f, map_location, pickle_module)
467 unpickler = pickle_module.Unpickler(f)
468 unpickler.persistent_load = persistent_load
--> 469 result = unpickler.load()
470
471 deserialized_storage_keys = pickle_module.load(f)
AttributeError: Can't get attribute 'Network' on <module '__main__'>
</code></pre>
<p>Why is not possible to save a model and reload it entirely?</p>
| 0non-cybersec
| Stackexchange | 617 | 1,780 |
Setting up a Godaddy SSL on CentOS?. <p>I've never set up an SSL on Linux before, but have a general idea of how it works. Server specs below if it helps:</p>
<p>Server: CentOS Linux 6
Workstation: Windows 7</p>
<p>So, I have 4 domains all of which share a single Magento installation and IP address. Assume one of my domains is "mywebsite1.com" I am trying to enable SSL just for this one domain for now, but I am running into errors. What am I doing wrong? Here's my work flow:</p>
<ol>
<li><p>I purchased an SSL from Godaddy then generated the csr and key with the command given by them:</p>
<p><code>openssl req -new -newkey rsa:2048 -nodes -keyout mywebsite1.key -out mywebsite1.csr</code></p></li>
<li><p>I copy both the files to /etc/pki/tls/private</p></li>
<li><p>I open mywebsite1.crs then copy and paste the code to Godaddy. </p></li>
<li><p>I generate the crt files and download them from Godaddy, upload to my server, and then move them to /etc/pki/tls/certs</p></li>
<li><p>a. 1st try, I opened /etc/httpd/conf.d/ssl.conf and updated the
<em>default</em> VirtualHost block's SSLCertificate File, KeyFile, and ChainFile values to point to the correct locations. </p>
<p>b. 2nd try, following
<a href="http://dev.antoinesolutions.com/apache-server/mod_ssl" rel="nofollow noreferrer">http://dev.antoinesolutions.com/apache-server/mod_ssl</a> I modified
ssl.conf and added this directive: </p>
<p><code>NameVirtualHost *:443</code></p>
<p>c. Then I removed the entire <em>default</em> VirtualHost block (which was
quite lengthy).</p>
<p>Last attempt, I added the following to the modified ssl.conf from</p></li>
</ol>
<p><code>
<VirtualHost *:443></p>
<pre><code> SSLEngine on
SSLCertificateFile /etc/pki/tls/certs/mywebsite1.com.crt
SSLCertificateKeyFile /etc/pki/tls/private/mywebsite1.key
SSLCertificateChainFile /etc/pki/tls/certs/gd_bundle.crt
DocumentRoot /var/www/html
ServerName mywebsite1.com
</VirtualHost>
</code></pre>
<p></code></p>
<p>6.. I restart Apache</p>
<p>7.. I then go to <a href="https://mywebsite1.com" rel="nofollow noreferrer">https://mywebsite1.com</a> only to find errors that prevent me from viewing the site in various browsers.</p>
<hr>
<p>Browser: Firefox</p>
<pre><code>SSL received a record with an unknown content type.
(Error code: ssl_error_rx_unknown_record_type)
</code></pre>
<hr>
<p>Browser: Chrome</p>
<pre><code>Error 107 (net::ERR_SSL_PROTOCOL_ERROR): SSL protocol error.
</code></pre>
<hr>
<p>Browser: IE ...takes me to Google...</p>
<hr>
<p>httpd.conf:</p>
<pre><code>NameVirtualHost 12.34.567.89
<VirtualHost 12.34.567.89>
DocumentRoot /var/www/html
ServerName website1.com
</VirtualHost>
<VirtualHost 12.34.567.89>
DocumentRoot /var/www/html
ServerName website2.com
</VirtualHost>
<VirtualHost 12.34.567.89>
DocumentRoot /var/www/html
ServerName website3.com
</VirtualHost>
<VirtualHost 12.34.567.90:80>
DocumentRoot /var/www/html
ServerName website4.com
</VirtualHost>
</code></pre>
<p>Notes: </p>
<ol>
<li>I've read that you must enable ssl with a command called "a2enmod ssl" but that command does not exist for my server. </li>
<li>There are no ssl error logs in /etc/httpd/logs.</li>
<li>As per Godaddy, I was instructed to name the key "mywebsite1" without the extension. However, they give me a crt with the extension, which is odd.</li>
<li>This is only development phase and this change will need to be quickly reproduced with a new SSL and different domains once we launch the production server.</li>
</ol>
<p>I've tried all of the steps 3 times (see 5a-5c), but still no luck in getting the SSL to work for 1 of my domains. How can I get SSL to work?</p>
<p><strong>UPDATE: apachectl -S</strong></p>
<pre><code>12.34.567.90:80 mywebsite4.com (/etc/httpd/conf/httpd.conf:1021)
12.34.567.89:* is a NameVirtualHost
default server mywebsite3.com (/etc/httpd/conf/httpd.conf:1016)
port * namevhost mywebsite3.com (/etc/httpd/conf/httpd.conf:1016)
port * namevhost mywebsite1.com (/etc/httpd/conf/httpd.conf:1026)
port * namevhost mywebsite2.com (/etc/httpd/conf/httpd.conf:1031)
port * namevhost mywebsite5.com (/etc/httpd/conf/httpd.conf:1036)
wildcard NameVirtualHosts and _default_ servers:
*:443 is a NameVirtualHost
default server mywebsite1.com (/etc/httpd/conf.d/ssl.conf:77)
port 443 namevhost mywebsite1.com (/etc/httpd/conf.d/ssl.conf:77)
Syntax OK
</code></pre>
<p><strong>UPDATE: Got it working..but..</strong></p>
<p>I managed to get the SSL running by changing the vhost to just point to mywebsite1 instead of *:443</p>
<pre><code><VirtualHost mywebsite1.com>
SSLEngine on
SSLCertificateFile /etc/pki/tls/certs/mywebsite1.com.crt
SSLCertificateKeyFile /etc/pki/tls/private/mywebsite1.key
#SSLCertificateChainFile /etc/pki/tls/certs/gd_bundle.crt
DocumentRoot /var/www/html
ServerName mywebsite1.com
ErrorLog logs/ssl_error_log
TransferLog logs/ssl_access_log
LogLevel warn
</VirtualHost>
</code></pre>
<p>This pulls up the SSL, however... the HTTP protocol returns a "Bad Request" </p>
<p>This change seems to be affecting the non-ssl viewing of the site. I can't specify the port because restarting apache will give me an error that ports and non-ports can't be mixed.</p>
<p><strong>UPDATE</strong></p>
<p>Fixed with the suggestion by Michael Hampton. Thanks guys.</p>
| 0non-cybersec
| Stackexchange | 1,911 | 5,458 |
Seagate's 30TB NAS with SimplyRAID configuration. <p>I recently bought a Seagate NAS Pro 6-Bay 30TB Network Attached Storage Drive (STDF30000100) from Amazon (<a href="http://rads.stackoverflow.com/amzn/click/B00LM6KVZA" rel="nofollow noreferrer">http://www.amazon.com/gp/product/B00LM6KVZA?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00</a>). It says it uses Seagate's SimplyRAID configuration. Unfortunately I could not find a clear explanation of how much space will I get if I opt for SimplyRAID as opposed to other RAID solutions. Can someone explain this to a newbie? Thanks.</p>
| 0non-cybersec
| Stackexchange | 195 | 602 |
How do I know if I will be able to daisy-chain monitors? (connect two monitors to 1 DisplayPort). <p>I am planning to use <a href="http://en.wikipedia.org/wiki/Microsoft_Surface_Pro_2" rel="noreferrer">Surface Pro 2</a> with a dock station as my main computer and I would like to connect two external monitors to it, but <a href="http://www.microsoft.com/surface/en-us/support/hardware-and-drivers/docking-station" rel="noreferrer">the dock station</a> only contains a single DisplayPort socket. However, I see that <a href="http://en.wikipedia.org/wiki/DisplayPort#1.2" rel="noreferrer">DisplayPort 1.2</a> specification, approved in 2009, allows for daisy-chaining monitors through its <em>Multi-Stream Transport</em> feature.</p>
<p>How do I tell if I will be able to use two monitors in daisy-chain mode with my computer?</p>
| 0non-cybersec
| Stackexchange | 245 | 831 |
How to use spot instance with amazon elastic beanstalk?. <p>I have one infra that use amazon elastic beanstalk to deploy my application.
I need to scale my app adding some spot instances that EB do not support.</p>
<p>So I create a second autoscaling from a launch configuration with spot instances.
The autoscaling use the same load balancer created by beanstalk.</p>
<p>To up instances with the last version of my app, I copy the user data from the original launch configuration (created with beanstalk) to the launch configuration with spot instances (created by me).</p>
<p>This work fine, but:</p>
<ol>
<li><p>how to update spot instances that have come up from the second autoscaling when the beanstalk update instances managed by him with a new version of the app?</p>
</li>
<li><p>is there another way so easy as, and elegant, to use spot instances and enjoy the benefits of beanstalk?</p>
</li>
</ol>
<p><strong>UPDATE</strong></p>
<p>Elastic Beanstalk add support to spot instance since 2019... see:
<a href="https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html</a></p>
| 0non-cybersec
| Stackexchange | 349 | 1,234 |
How to use spot instance with amazon elastic beanstalk?. <p>I have one infra that use amazon elastic beanstalk to deploy my application.
I need to scale my app adding some spot instances that EB do not support.</p>
<p>So I create a second autoscaling from a launch configuration with spot instances.
The autoscaling use the same load balancer created by beanstalk.</p>
<p>To up instances with the last version of my app, I copy the user data from the original launch configuration (created with beanstalk) to the launch configuration with spot instances (created by me).</p>
<p>This work fine, but:</p>
<ol>
<li><p>how to update spot instances that have come up from the second autoscaling when the beanstalk update instances managed by him with a new version of the app?</p>
</li>
<li><p>is there another way so easy as, and elegant, to use spot instances and enjoy the benefits of beanstalk?</p>
</li>
</ol>
<p><strong>UPDATE</strong></p>
<p>Elastic Beanstalk add support to spot instance since 2019... see:
<a href="https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html</a></p>
| 0non-cybersec
| Stackexchange | 349 | 1,234 |
Lag in keyboard response in 16.04. <p>I recently went to a full install of Ubuntu 16.04 LTS. (I was dual booting for a while) and now there are no other operating systems on my laptop. So I have it on my hp -2000 laptop that is a few years old but still has a 400g hard drive and 12g of ram. I do notice though if I have had the laptop on for a while (say from 8am till about 12pm) It starts to act sluggish. Keystrokes are delayed is really the biggest issue. If I power cycle it comes back good as new and there is no issue. Is this a problem other folks have had? Is it just my bad laptop? </p>
| 0non-cybersec
| Stackexchange | 162 | 599 |
Should all class public methods come from an interface?. <p>I'm currently learning about TDD techniques, one of the suggestion is to test only public methods and skip the private ones. I have also been reading about Mocking. If I want to mock a certain method, then it needs to come from an interface or be marked as virtual. When I start developing my application I don't know which methods I will want to mock while creating unit tests, because of that I think it's best to make them all available for mocking.</p>
<p>I assume that making all methods virtual isn't the best solution, then the alternative is the interface approach mentioned above.</p>
<p>Is that the right direction or do I miss something obvious?</p>
| 0non-cybersec
| Stackexchange | 163 | 723 |
I Think My Parents Were Demon Hunters - Part 2. [Part 1](https://www.reddit.com/r/nosleep/comments/6bvonc/i_think_my_parents_were_demon_hunters/)
It’s time to search my parents’ house.
One single book had seemed to upend everything I knew about time and space. What else did they have hiding in here?
Both had been professors, but neither in theology. My father was a professor of English literature, and my mother was a physicist, for fuck’s sake. It made no sense. Or maybe a lot of sense. I was still a bit too shaken to figure things out, and my hand still burned like Satan’s hemorrhoids.
I walked absentmindedly to the top of the stairs, sat on the first step, and started riffling through the book. I didn’t know if I wanted to find the text exactly the same, or find that it had inexplicably vanished. I had no idea which one would make more sense.
That’s not true. I wanted to find the text. I wanted to discover the strange. Something was *calling* me. I wanted to answer it.
I found it. Randomly allocated throughout the book was the advice that I had been given. Reading through it made little sense, as the narrative was not punctuated by real-time demon wrangling and pants-shitting.
So the narrative had been there the whole fucking time, penned and published God knows how many years before my birth. I don’t know what to take from this.
I resolved to pick my way through the whole book. It was at least a thousand pages, but there clearly lay answers within.
I snapped it closed and walked downstairs, planning the time that I would set aside to read it.
My dead parents were in the kitchen.
Mom was splayed out on the table, skin pallid and torso strewn open like a dropped taco. Dad was behind the table, checkered napkin around his neck, hands working furiously with his knife and fork.
He was eating my mom’s intestines.
His face was grinning with ghoulish delight as he pumped back and forth with his knife, cutting through gristle and bone. The lower half of his face was covered in blood.
He continued to pump rhythmically as he slowly raised his head to meet my gaze. Without breaking eye contact, he pulled out a gelatinous piece of cartilage with his fork, and passed it to my mother. She took the fork in her mouth, and slowly began to autocannibalize herself. Then she, too, pivoted her gaze at me and grinned.
One of her eye sockets was empty.
I screamed – or at least tried to – and slammed into the cupboard behind me. I fell the floor with a crash as the cupboard door burst open and pots and pans rained down on top of me.
I shot back to my feet, dazed, and grabbed wildly for the watch, the rosary, anything. I reached into my pocket, but my hands only found the car keys. I waved them in front of me fruitlessly, as though they were a talisman that could protect me from the horror I had just seen.
I focused my eyes on the scene in front of me. Nothing was on the table. I was alone in the room, with the only motion coming from a lone, swirling tin lid to a forgotten pan.
Perhaps demon hunting was going to prove more difficult than I’d thought.
*
I sat on the couch in the living room with a steaming cup of chamomile tea by my side. It’s hard to say if this act of mimicking my parents’ habits was intentional or not, but perhaps imitating them wasn’t as bad as I’d thought when I was seventeen.
The book lay open on my lap. I didn’t bother hunting for a page. I just opened it up near the front and began reading.
‘That scene must have shocked you, Peter. You were attacked by a demon upstairs, and it damaged you in ways that weren’t physical. You must realize by now that everything you saw was in your head – but that doesn’t make it less real.
‘You need to find a way to heal yourself, or the damage might permanently affect your untrained mind.”
I snapped the book shut. Nothing like mom’s soothing advice to comfort you when you’re down.
I paced the room. I was at one hell of a crossroads; if I continued to pursue my parents, things would just keep getting deeper. There’d be no going back.
I found myself wondering what led my parents to whatever decision they must have faced. I imagined them discussing their fate. I could see my father pointing out that fear of death creates something that never existed before, and that this fear was its own kind of demon. My mother, in her infinite logic, would have responded that death itself was real regardless of our actions, and that every human birth is nothing more than a delayed death sentence.
They were right, of course.
And if chose not to follow now, it would not save my life. I was going to die at some point, and when the time came, the only thing I would have left was the ability to say ‘I did *that.*’
I crossed back to the couch and opened the book.
‘Start with the smallest demon, son.’ My father’s advice ended the chapter and gave no more insight.
What. The. Fuck.
I wracked my brain to think of what that meant. When had my father ever talked about a demon?
*I was crying. Buster Duncan had punched me, hard, and taken three of my best G. I. Joes. He had squeezed my neck until I denounced ownership. When he let me go, I ran home at a full sprint. In a rare moment of near-human compassion, my father had hugged me as I cried. “He’s the worst kid in the world, Dad. He makes me feel so small. He’s a demon,” I gasped through sobs.*
*“Well, son, don’t be controlled by him. If this is the way that he lives his life, if hurting other kids makes him happy, then he really is the smallest kid in the world.”*
Buster Duncan was the worst piece of shit that I knew growing up. He lived to cause anguish to other kids. Despite my father’s assurances, he was significantly larger than anyone else in our class, on account of being held back a grade on two separate occasions. I had the great fortune of growing up on the same street as him. I wondered if he still lived in the same dump at the end of the road. What did idiots do when they grew up?
I made it to the house in under five minutes. It looked worse than it had when I was a kid.
Past the three rusted autos and the elegant collection of weeds sat the screen door. It reeked of stale cigarettes and sadness.
I knocked and heard a grumbling from within. His mother, who looked miserable just to be alive and angry for having to face a visitor, waddled to the threshold. Crumbs tumbled from her mumu.
“Yeah,” she offered in a way of greeting.
“Hi, um – Mrs. Duncan? I’m an old… friend… of Buster’s. From his childhood. Could he, um…. Could I see him?”
She eyed me suspiciously for several awkward seconds. “He’s out back,” she finally croaked in a cigarette-stained voice.
I followed awkwardly through the ramshackle home and toward the back porch. She sat back down on the couch.
Buster Duncan stood smiling in the back yard, which was little more than a dirt patch carved from the surrounding woods. He was bigger and fatter than ever. But more than that, I could tell that he was still just *mean.* The look was unmistakable from anyone who had been pounded by a jerk as a kid.
“Buster,” I said, descending the porch steps slowly and deliberately. “I don’t know if you remember me. Peter,” I offered. I came to a stop in the dirt ten feet in front of him. “You used to call me ‘faggot lips.’”
His smile was as unwavering as it was stupid.
“I came here to tell you something. To exorcise a demon, if you will.” I clutched the pocket watch in my left pocket, and the rosary in my right. “You made me afraid to walk down the street when I was younger. I had so many bruises on my arms in elementary school that Child Protective Services actually showed up to question my parents about beating me.” I gave a wan smile. “I think CPS decided it was impossible that anyone as boring as them could even make a fist.”
His glare was unchanging, his hands clenching and unclenching.
“But it was more than that,” I went on, my voice cracking just a little. “You made me afraid to *be.* You made me think that there was something so inherently ugly and wrong with being *Peter* that I deserved it. It might just sound like childhood bullying, but it *wrecked* my self-esteem, which made me think I was weak, and therefore deserved it even more. I didn’t realize until years later that *you* were the one who was wrong,” my breath hitched, and the beginning of a sob escaped my lips, “and that I could not keep you from being small. I could only choose whether or not to feel smaller. So I want to say something I should have long ago.”
I advanced until I was two feet away from him, and eye-level with his chest.
“I forgive you. Truly.” I sighed. “I choose to exorcise this demon.”
It was then that I realized his eyes were yellow.
The demon screamed and swung at me. I was too shocked to pull either item from my pocket, and simply stared agape as his fist made contact with my chin.
And bounced harmlessly off.
It shrieked and started clawing at me with essentially no effect. My sleeves were slightly ruffled. I could only gawk in confusion as it became more and more agitated, swinging harder and harder in a fruitless endeavor.
It let out a final scream, erupted into flames, and turned to sprint into the woods. The only thing that came to my confused mind was shock at just how small it was as it receded into the darkness.
I turned back to face the house, imagining that his mother would emerge to investigate the noise.
She didn’t.
I finally turned back around a saw something in the dirt that I had not noticed before.
It was a granite marker. I approached it.
“Buster Duncan, Born 1-10-79, Died 1-9-13.’ Nothing more was written.
I stared in silence for some time.
Finally, I opened the book. The page was the last paragraph of a chapter.
‘There are many ways to go out into the world and face the demons that haunt it, son. Those are the ones that may destroy your body. This is how your mother and I met our physical end; never, ever forget that any battle worth fighting is one that you may very well lose. But it is impossible, completely impossible, to kill any one of them while a demon still lives inside. No weapon will work. Which is why I should tell you now that the demon you sent back into the hole was not harmed, just banished. And he is likely quite angry with you. Be forewarned. And know that we’re proud.’
Of all the things in the whole fucking book, it was the last sentence that caused the greatest impact.
As I turned the page with my right hand, I realized that it didn’t hurt anymore. I smiled.
The next chapter was entitled ‘Into the Woods.’ I frowned.
It was almost dark.
I remember thinking, as a child, that heroes going on great adventures must feel no fear. That the only reason they struck out in the first place was because they knew they were empowered in a way that made them ready to face any challenge, and that the reason people listening to their stories trembled in fear is *because* they were listening, and not *doing.*
The greatest of hunters, I had decided, simply were not afraid.
I realized, as I climbed cautiously into those twilit woods – with nothing but a book, a watch, and some beads – that I had been full of shit.
I was terrified.
[Part 3](https://www.reddit.com/r/nosleep/comments/6ca2m7/i_think_my_parents_were_demon_hunters_part_3/)
[Crossroads]( https://www.reddit.com/r/nosleep/comments/6cg96m/a_parley_with_the_prisoner_of_purgatory/)
[Part 4]( https://www.reddit.com/r/nosleep/comments/6cn0ti/i_think_my_parents_were_demon_hunters_part_4/)
[Part 5](https://www.reddit.com/r/nosleep/comments/6cuh7n/i_think_my_parents_were_demon_hunters_part_5/)
[Part 6](https://www.reddit.com/r/nosleep/comments/6d9k91/i_think_my_parents_were_demon_hunters_part_6/)
[Then](https://www.reddit.com/r/nosleep/comments/6d21vk/feeling_whittier_narrows_focus/)
[Part 7](https://www.reddit.com/r/nosleep/comments/6ee9gl/i_think_my_parents_were_demon_hunters_part_7/)
[Part 8](https://www.reddit.com/r/nosleep/comments/6flfs4/i_think_my_parents_were_demon_hunters_part_8_final/) | 0non-cybersec
| Reddit | 3,173 | 12,100 |
Can this approximation be made more formal?. <p>When considering oscillating systems in physics, we end up with some response function like $$F(\omega) = \frac{\omega^2}{(\omega_0^2 - \omega^2)^2 + (\omega/\tau)^2},$$ where $\omega_0$ and $\tau$ are characteristic properties of the system, and $\omega$ is the driving frequency. We are generally interested in the behavior of $F(\omega)$ close to the maximum, $\omega = \omega_0$, which is the resonant frequency. However, the usual approach to approximate $F(\omega)$ is the following $$F(\omega) = \frac{\omega^2}{(\omega_0 - \omega)^2 (\omega_0 + \omega)^2 + (\omega/\tau)^2} \approx \frac{\omega_0^2}{4 \omega_0^2 (\omega_0 - \omega)^2 + (\omega_0/\tau)^2} = \frac{\frac{1}{4}}{(\omega_0 - \omega)^2 + (1/2\tau)^2}.$$</p>
<p>Is there a way to formalize and justify the above approximation? Could this be a form of Pade approximation?</p>
| 0non-cybersec
| Stackexchange | 275 | 894 |
Prison problem: locking or unlocking every $n$th door for $ n=1,2,3,...$. <p>I have a problem called "The Prison Problem" that I need to explain to my 9-year-old cousin. I would think that he has just started learning about divisors and perfect squares, and as such, I have a proposed solution. Any input from you guys would be welcome, as to what is the best way to go about this.</p>
<p><strong>Problem:</strong></p>
<p>There was a jail with 100 cells in it, all in a long row. The warden was feeling very jolly one night and told his assistant that he wanted to give all the prisoners a wonderful surprise. While they were sleeping, he wanted the assistant to unlock all the cells. This should be done, he told the assistant, by putting the key in each lock, turning it once. The assistant did this, then came back to report that the job was done. Meanwhile, however, the warden has second thoughts. "Maybe I shouldn't let all the prisoners free," he said. "Go back and leave the first cell open, but lock the second one (by putting the key in and turning it once). Then leave the third open, but lock the fourth, and continue in this way for the entire row." The assistant wasn't very surprised at this request as the warden often changed his mind. After finishing this task, the assistant returned, and again the warden had other thoughts. "Here's what I really want you to do," he said. "Go back down the row. Leave the first two cells as they are, and put your key in the third cell and turn it once. Then leave the fourth and fifth cells and turn the key in the sixth. Continue down the row this way." The assistant again did as instructed. Fortunately, the prisoners were still asleep. As a matter of fact, the assistant was getting pretty sleepy, but there was no chance for rest yet. The warden changed his mind again, and the assistant had to go back again and turn the lock in the fourth cell and in every fourth cell down the row. This continued all through the night, next turning the lock in every fifth cell, and then in every sixth, and on and on, until on the last trip, the assistant just had to turn the key in the hundredth cell. When the prisoners finally woke up, which ones could walk out of their cells?</p>
<p><strong>Proposed solution:</strong></p>
<p>Ten cells are left open after this process. Every cell that is a perfect square will remain open (1, 4, 9, 16, 25, 36, 49, 64, 81, and 100). If a number is not a perfect square, then it has an even number of divisors, therefore it will be "toggled" an even number of times and end up where it started (closed). Perfect squares have an odd number of divisors, so they will end up the opposite of where they started (open).</p>
| 0non-cybersec
| Stackexchange | 656 | 2,710 |
Go benchmark run from main / go playground. <p>I am trying to create a suite of benchmark tests</p>
<p><a href="https://play.golang.org/p/uWWITU-WKaL" rel="nofollow noreferrer">https://play.golang.org/p/uWWITU-WKaL</a></p>
<p>package main</p>
<pre><code>import (
"fmt"
"testing"
)
func runall(a, b string) (bool, error) {
return true, nil
}
func main() {
bench := []testing.InternalBenchmark{
{
F: Benchmark_Dev,
},
}
tests := []testing.InternalTest{
{
F: Test_Dev,
},
}
testing.Main(runall, tests, bench, nil)
}
func Test_Dev(t *testing.T) {
fmt.Println("Test_Dev")
}
func Benchmark_Dev(b *testing.B) {
fmt.Println("Benchmark_Dev")
b.ReportAllocs()
for i := 0; i < b.N; i++ {
res := i % 10
fmt.Println(res)
}
}
</code></pre>
<p>I see Tests are run fine, but the benchmarks are never run.</p>
| 0non-cybersec
| Stackexchange | 353 | 929 |
Legal Question about Overwatch Gameplay. I'm wanting to upload videos on my channel detailing my thoughts and impressions on each of the heroes as they are released, and it would be best, for sake of context, to have the actual gameplay shown in each video.
However, to not risk getting sued up m'butt, I'd like to know whether or not Blizzard is allowing people to use their gameplay for sake of discussion. I would also like to know, if I have to ask permission to use it, who exactly I would have to contact and where to get that contact information from.
Thank you all very much in advance. | 0non-cybersec
| Reddit | 136 | 599 |
IIS7 - The request filtering module is configured to deny a request that exceeds the request content length. <p>I want to upload images, it works fine on my machine but when I put my website on IIS7 server for public I can't upload anything.</p>
<h2>Error</h2>
<blockquote>
<p>The request filtering module is configured to deny a request that
exceeds the request content length.</p>
</blockquote>
<h2>Most likely causes</h2>
<blockquote>
<p>Request filtering is configured on the Web server to deny the request
because the content length exceeds the configured value.</p>
</blockquote>
<h2>Things you can try</h2>
<blockquote>
<p>Verify the configuration/system.webServer/security/requestFiltering/requestLimits@maxAllowedContentLength
setting in the applicationhost.config or web.config file.</p>
</blockquote>
<h2>system.webServer in Web.config</h2>
<pre><code> <system.webServer>
<validation validateIntegratedModeConfiguration="false" />
<modules runAllManagedModulesForAllRequests="true" />
<security>
<requestFiltering>
<requestLimits maxAllowedContentLength="1048576" />
</requestFiltering>
</security>
</system.webServer>
</code></pre>
<p>As you can see I set my maxAllowedContentLength to 1gb. Restarted my website and still getting this error. I made an <code>/uploads/</code> folder on my file system where it suppose to be as well. Have no idea what causes this error and why I can't upload images.</p>
| 0non-cybersec
| Stackexchange | 464 | 1,529 |
Calculate $\frac{i^2-i^{31}+(4+3i)(5-2i)}{\frac{1}{2}i}$ without a calculator. <p>I tried:</p>
<p>$$\frac{i^2-i^{31}+(4+3i)(5-2i)}{\frac{1}{2}i} = \\
\frac{-1-(-1)+(4+3i)(5-2i)}{\frac{1}{2}i}= \\
\frac{26+7i}{\frac{1}{2}i} = \\
\frac{52+14i}{i} = \\
\frac{(52+14i)\cdot-i}{i\cdot -i} = \\ \\
14-52i$$</p>
<p>But my book states the solution is $16-50i$. What went wrong?</p>
| 0non-cybersec
| Stackexchange | 199 | 376 |
Android Support plugin doesn't exist. <p>When I run my application, Android Studio notifies me with 3 errors as shown below</p>
<p><a href="https://i.stack.imgur.com/PHK4U.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PHK4U.png" alt="enter image description here"></a></p>
<p>I have looked up the error on the internet and StackOverflow forums and I have found a solution to disable and re-enable <code>Android Support</code> plugin in settings but I didn't find the plugin and I didn't find a way to install it. Here is my plugin list:</p>
<p><a href="https://i.stack.imgur.com/KckPJ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/KckPJ.png" alt="enter image description here"></a></p>
<p>As you see in the picture <code>Android Support</code> plugin doesn't exist.</p>
<p>Here is the reference what I have found on StackOverflow <a href="https://stackoverflow.com/questions/20560746/in-android-studio-cannot-load-2-facets-unknown-facet-typeandroid-and-android-gr">In android studio,cannot load 2 facets-unknown facet type:android and android-gradle</a></p>
<p>Any help is appreciated.</p>
| 0non-cybersec
| Stackexchange | 359 | 1,142 |
IamA Mike Shinoda AMA!. **My short bio:**
Hey guys, Mike Shinoda here, from Linkin Park. I like long walks on the beach, short walks off long cliffs, and medium-length intros about what I’m about to be doing.
A little bit about me:
- I can’t touch my shoulders with my hands unless I cross them (right hand can’t touch right shoulder, left can’t touch left).
- The only bone I’ve broken is my pinky toe, which I happened when I slammed it into a wall while turning a corner too closely because I was running to the bathroom.
- I started an NES gamer club in junior high called “NINTENDOL, where the only rule was that you be able to finish any NES game you played in 7 days or less from the time you opened the package. We all drew the letter “L” on our consoles in red.
- I drew and painted obsessively growing up, and invented my own casts of characters for Mega Man, Metroid, Super Mario, and a handful of Dungeons and Dragons characters (shout out to Jeff Easley).
- I can’t do a safety float on my back in the water; my legs sink and I go under far enough that my nose is submerged.
- I once made a demo tape of joke gangsta rap songs called “Pooch Pound” that included a song called “North Coast Killa” where we executed all our Canadian gangsta rivals.
- Lastly, I have a side-project called Fort Minor, and I recently released a song and 360 video called “WELCOME”.
I’ll be answering your questions for the next 60 minutes, so ask me anything about music, tech, drawing, painting, snowboarding, basketball, Music For Relief, or whatever else comes to mind. Excited to talk to you guys!
**My Proof:** https://instagram.com/p/6SmCbODmTp/
//////
Hey guys, thanks so much for all the great questions. We leave for Europe this week, see you guys at the shows. And thank you for supporting Linkin Park and Fort Minor. And thanks for the support on WELCOME: https://www.youtube.com/watch?v=REAwGmv0Fuk (make sure to watch on your phone in the YouTube app for the 360 experience)
-Mike
| 0non-cybersec
| Reddit | 544 | 2,058 |
How to use spot instance with amazon elastic beanstalk?. <p>I have one infra that use amazon elastic beanstalk to deploy my application.
I need to scale my app adding some spot instances that EB do not support.</p>
<p>So I create a second autoscaling from a launch configuration with spot instances.
The autoscaling use the same load balancer created by beanstalk.</p>
<p>To up instances with the last version of my app, I copy the user data from the original launch configuration (created with beanstalk) to the launch configuration with spot instances (created by me).</p>
<p>This work fine, but:</p>
<ol>
<li><p>how to update spot instances that have come up from the second autoscaling when the beanstalk update instances managed by him with a new version of the app?</p>
</li>
<li><p>is there another way so easy as, and elegant, to use spot instances and enjoy the benefits of beanstalk?</p>
</li>
</ol>
<p><strong>UPDATE</strong></p>
<p>Elastic Beanstalk add support to spot instance since 2019... see:
<a href="https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html</a></p>
| 0non-cybersec
| Stackexchange | 349 | 1,234 |
How to use spot instance with amazon elastic beanstalk?. <p>I have one infra that use amazon elastic beanstalk to deploy my application.
I need to scale my app adding some spot instances that EB do not support.</p>
<p>So I create a second autoscaling from a launch configuration with spot instances.
The autoscaling use the same load balancer created by beanstalk.</p>
<p>To up instances with the last version of my app, I copy the user data from the original launch configuration (created with beanstalk) to the launch configuration with spot instances (created by me).</p>
<p>This work fine, but:</p>
<ol>
<li><p>how to update spot instances that have come up from the second autoscaling when the beanstalk update instances managed by him with a new version of the app?</p>
</li>
<li><p>is there another way so easy as, and elegant, to use spot instances and enjoy the benefits of beanstalk?</p>
</li>
</ol>
<p><strong>UPDATE</strong></p>
<p>Elastic Beanstalk add support to spot instance since 2019... see:
<a href="https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html</a></p>
| 0non-cybersec
| Stackexchange | 349 | 1,234 |
Efficient Implementation of Taylor Series for Sine. <p>I am trying out a few forms of polynomial expression optimization, and I'd like to improve of what I've got, if anyone has anything they know is better.</p>
<p>Implementation 1:</p>
<p>$$x-\frac{x^3}{3!}+\frac{x^5}{5!}-\frac{x^7}{7!}$$</p>
<p>To the best of my knowledge, this has 3 add/subtracts, 21 muls, and 3 divs.</p>
<p>Implementation 2:</p>
<p>$$x(1+x^2(\frac{-1}{3!} + x^2(\frac{1}{5!} + x^2(\frac{-1}{7!}))))$$</p>
<p>This appears to have 3 adds/subracts, 13 muls, and 3 divs. This is assuming that $x^2$ is precalculated. (I may have counted wrong here.)</p>
<p>Implementation 3:</p>
<p>$$x(1+\frac{x^2}{3!}(-1 + \frac{x^2}{5*4}(1 - \frac{x^2}{7*6}))))$$</p>
<p>This appears to have 3 adds/subtracts, 6 muls, and 3 divs. Edit: Again, assuming a precalculated $x^2$.</p>
<p>Note: In all my factorial calculations, I have not done the $*1$ final multiply.</p>
<p>Am I doing anything wrong here, or is there any way this implementation can be made more computationally efficient?</p>
| 0non-cybersec
| Stackexchange | 400 | 1,057 |
Am I crazy? Switching an established product from HSQLDB to Apache Derby. <p>I have an established software product that uses HSQLDB as its internal settings database. Customer projects are stored in this database. Over the years, HSQLDB has served us reasonably well, but it has some stability/corruption issues that we've had to code circles around, and even then, we can't seem to protect ourselves from them completely.</p>
<p>I'm considering changing internal databases. Doing this would be fairly painful from a development perspective, but corrupted databases (and <em>lost data</em>) are not fun to explain to customers.</p>
<p>So my question is: Does anyone have enough experience to weigh in on the long-term stability of Apache Derby? I found a post via Google complaining that Derby was unstable, but it was from 2006 so I'd entertain the idea that it has been improved in the last 4 years. Or, is there another pure Java embedded (in-process) database that I could use (commercial or open-source). Performance isn't very important to me. Stability is king. Data integrity across power loss, good BLOB support, and hot-backups are all a must.</p>
<p>Please don't suggest something that isn't a SQL-based relational database. I'm trying to retrofit an existing product, not start from scratch, thanks.</p>
| 0non-cybersec
| Stackexchange | 305 | 1,320 |
How to use spot instance with amazon elastic beanstalk?. <p>I have one infra that use amazon elastic beanstalk to deploy my application.
I need to scale my app adding some spot instances that EB do not support.</p>
<p>So I create a second autoscaling from a launch configuration with spot instances.
The autoscaling use the same load balancer created by beanstalk.</p>
<p>To up instances with the last version of my app, I copy the user data from the original launch configuration (created with beanstalk) to the launch configuration with spot instances (created by me).</p>
<p>This work fine, but:</p>
<ol>
<li><p>how to update spot instances that have come up from the second autoscaling when the beanstalk update instances managed by him with a new version of the app?</p>
</li>
<li><p>is there another way so easy as, and elegant, to use spot instances and enjoy the benefits of beanstalk?</p>
</li>
</ol>
<p><strong>UPDATE</strong></p>
<p>Elastic Beanstalk add support to spot instance since 2019... see:
<a href="https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html</a></p>
| 0non-cybersec
| Stackexchange | 349 | 1,234 |
Fresh Debian Install boots without GUI while Gnome being installed. <p>I installed a Debian (I've forgotten the exact Version) from a DVD onto a fresh system.
Everything seemed to be fine. The grub menu opened and I was able to choose between Debian and Debian Recovery. Both of these choices stopped the boot process at some point (fb: conflicting fb hw usage nouveaufb vs EFI VGA - removing generic driver).
With the help of (nouveau.modeset=0) Debian seems to boot correctly. It appears a black screen with the blinking _ cursor.
Pressing Ctrl + Alt + F1 opened a full screen console.
Everything seems to work except for the GUI.</p>
<p>I tried <code>sudo startx</code> but this gives me an Error</p>
<blockquote>
<p>Fatal server error: no screens found</p>
</blockquote>
<p>I already searched the WEB and figured out it might have something to do with the Nvidia Card (GTX 950)</p>
<p>I'm open to all new attempts on how to resolve this.</p>
| 0non-cybersec
| Stackexchange | 254 | 952 |
Run a Docker Image as a Container (for windows users). <p>I built a docker image from a dockerfile. I see the image was built successfully (
<code>$ docker images</code>) and when I use this command to run the image as a container :</p>
<pre><code>$ docker run -i -t 8dbd9e392a96
</code></pre>
<p>My application was running successfully, but when I'm trying to open I've this message </p>
<blockquote>
<p>This site can’t be reached</p>
</blockquote>
<p>This is my list of images : </p>
<pre><code> $ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
blog latest b9c52b9f2999 About an hour ago 143MB
openjdk 8-jre-alpine 14a48fdee8af 3 days ago 83MB
</code></pre>
<p>and my containers list : </p>
<pre><code>$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
4dbb68c87813 b9c52b9f2999 "./entrypoint.sh" 27 minutes ago Up 27 minutes 8080/tcp dazzling_shirley
</code></pre>
<p>I got this result after running the app using docker image : </p>
<pre><code> ----------------------------------------------------------
Application 'blog' is running! Access URLs:
Local: http://localhost:8080
External: http://172.17.0.2:8080
Profile(s): [dev, swagger]
----------------------------------------------------------
</code></pre>
<p>I dunno why the app didn't work any help please ?? ! </p>
| 0non-cybersec
| Stackexchange | 454 | 1,604 |
Difference between pointer to pointer and pointer to array?. <p>Given that the name of an array is actually a pointer to the first element of an array, the following code:</p>
<pre><code>#include <stdio.h>
int main(void)
{
int a[3] = {0, 1, 2};
int *p;
p = a;
printf("%d\n", p[1]);
return 0;
}
</code></pre>
<p>prints <code>1</code>, as expected.</p>
<p>Now, given that I can create a pointer that points to a pointer, I wrote the following:</p>
<pre><code>#include <stdio.h>
int main(void)
{
int *p0;
int **p1;
int (*p2)[3];
int a[3] = {0, 1, 2};
p0 = a;
p1 = &a;
p2 = &a;
printf("p0[1] = %d\n(*p1)[1] = %d\n(*p2)[1] = %d\n",
p0[1], (*p1)[1], (*p2)[1]);
return 0;
}
</code></pre>
<p>I expected it to compile and print</p>
<pre><code>p0[1] = 1
(*p1)[1] = 1
(*p2)[1] = 1
</code></pre>
<p>But instead, it goes wrong at compile time, saying:</p>
<pre><code>test.c: In function ‘main’:
test.c:11:5: warning: assignment from incompatible pointer type [enabled by default]
</code></pre>
<p>Why is that assignment wrong? If <code>p1</code> is a pointer to a pointer to an <code>int</code> and <code>a</code> is a pointer to an <code>int</code> (because it's the name of an array of <code>int</code>s), why can't I assign <code>&a</code> to <code>p1</code>?</p>
| 0non-cybersec
| Stackexchange | 581 | 2,160 |
Nginx with mod_security on EC2. <p>I am looking to get some ideas and see what others are doing in terms of managing/keeping updated Nginx + mod_security on EC2 instances. The catch with this is that mod_security needs to be compiled and then Nginx needs to be compiled with mod_security vs. installing via package.</p>
<p>Just to clarify some of the confusion - I am not looking for a product recommendation. I am aware of plenty of products and tools (Chef, Puppet, etc) and have used them in the past myself. </p>
<p>What I am interested in is technique and workflow. For example, do you use a lifecycle management tool to build an EC2 instance and then attach an EBS-volume to it. Do you build AMI's and then keep those up to data periodically, e.g. I make an AMI, update it as needed, take my production EC2 instance and replace it with the AMI that just has been updated - with data stored on a separate volume and attached to the new AMI. Or do you do something else?</p>
| 0non-cybersec
| Stackexchange | 256 | 987 |
Find a harmonic conjugate $v$ so that $f=u+iv$ is holomorphic. <p>We have to show that, for $\xi \in \partial K(0,1)$, the function</p>
<p>$$
u_\xi = \frac{1-|z|^2}{|\xi - z|^2}
$$</p>
<p>is harmonic in $K(0,1)$ and then find the harmonic conjugate to $u_\xi $.</p>
<p>It's very cumbersome to differentiate the function directly and prove it's harmonic that way, and I assume even more complicated to find its harmonic conjugate.</p>
<p>What about finding a function $v$ such that $f=u+iv$ is holomorphic? Something like (what it looks like for $\xi = 1$ )</p>
<p>$$f=\frac{g_1+i g_2}{1-z}$$</p>
<p>Any ideas?</p>
| 0non-cybersec
| Stackexchange | 227 | 620 |
Change hotkey for autocomplete selection. <p>In Eclipse, I find it pretty annoying that Enter is the hotkey that selects an item from the Content Assist/Autocomplete list. Especially in PyDev where there is no end-of-line semicolon, pressing enter for a new line will instead give me whatever is selected in the Autocomplete list.</p>
<p>Tab is a much better selection hotkey since I'm not likely to want a tab mid-line.</p>
<p>Any chance of changing this in Eclipse?</p>
<p>Using CDT, PDT, and PyDev, but interested in any solution related to Eclipse.</p>
| 0non-cybersec
| Stackexchange | 152 | 561 |
Are there non-Hausdorff examples of maximal compact topologies in the lattice of topologies on a set?. <p>In the lattice of topologies on a set $X$, the compact topologies are a lower set in the lattice, while the Hausdorff topologies are an upper set. A result of <a href="http://www.proofwiki.org/wiki/Continuous_Bijection_from_Compact_to_Hausdorff_is_Homeomorphism">this theorem</a> is that the compact Hausdorff topologies are maximal elements in the set of compact topologies and minimal elements of the set of Hausdorff topologies in this lattice.</p>
<p>I have been failing to construct an example of a maximal compact topology that is not Hausdorff, but I feel like I am just lacking imagination - it seems unlikely that all maximal compact topologies are Hausdorff.</p>
<p>Finite topologies won't work, since the only Hausdorff topology on a finite set is the discrete topology, and, as the maximal element in the lattice, the only maximal compact topology.</p>
<p>My intuition is that there must be such examples, but it seems just possible that if a compact set is not Hausdorff, we might be able to create a new compact topology that is larger in the lattice.</p>
<p>There is the obvious dual question, too: Is there a minimal element of the set of Hausdorff topologies which is not compact?</p>
<p>Just to make the problem self-contained, the result referenced above is:</p>
<blockquote>
<p>A continuous bijection from a compact space to a Hausdorff space is a
homeomorphism.</p>
</blockquote>
<p>If $(X,\tau)$ is compact and Hausdorff, and $\tau\subseteq \tau'$ with $\tau'$ also a compact topology, then the identity function $(X,\tau')\to(X,\tau)$ is a continuous bijection from a compact space to a Hausdorff space, so it must be a homeomorphism, which implies $\tau=\tau'$.</p>
<p>Similarly, a compact Hausdorff topology is minimal Hausdorff topologies.</p>
| 0non-cybersec
| Stackexchange | 485 | 1,888 |
Proof that convergence almost everywhere is not topological.. <p>I have written the following proof that convergence almost everywhere is not topological, and I would like it checked if you guys please:</p>
<p>Assume that $\tau$ is the topology of almost everywhere convergence. </p>
<p>Let $f_n$ be a sequence of measurable functions dominated by an integrable function.</p>
<p>Lemma: If $f_n\to f$ in $\tau$ then $f_n\to f$ in $L^1$.</p>
<p>Theorem: $f_n\to f$ in $L^1$ implies $f_n\to f$ in $\tau$</p>
<p>Proof:</p>
<p>$f_n\to f$ in $L^1$ implies that every subsequence of $f_n$ converges to $f$ in $L^1$. But then for every subsequence of $f_n$, we have a subsequence (of the subsequence) that converges almost everywhere to $f$. </p>
<p>Thus, for every subsequence of $\{f_n\}$, there is a subsequence of that subsequence that converges to $f$ in $\tau$.</p>
<p>But $\tau$ is a topology and we can thus conclude that $f_n$ converges to $f$ in $\tau$. End Of Proof.</p>
<p>Therefore, we have proved that convergence in $L^1$ for a set of measurable dominated functions implies almost everywhere convergence. </p>
<p>However, the typewriter sequence satisfies the hypothesis without converging almost everywhere. </p>
<p>Thus, we have proved a wrong theorem and thus our assumption that $\tau$ exists was wrong.</p>
<p>Thus, convergence almost everywhere is not topological.</p>
| 0non-cybersec
| Stackexchange | 424 | 1,395 |
Visual Studio 2010: Projectitem unavailable. <p>When trying to design a form in Visual Studio 2010:</p>
<p><img src="https://i.stack.imgur.com/cLhPV.png" alt="enter image description here"></p>
<p>How do i tell Visual Studio to ignore whatever's causing the problem and continue?</p>
<hr>
<p>Research the problem showed two possible solutions:</p>
<ul>
<li><a href="https://stackoverflow.com/questions/5090435/image-button-on-visual-studio-2010-c">Merideth was able to click "Ignore and Continue"</a>. (i have no such option)</li>
<li>[Dan simply restarted Visual Studio (Visual Studio 2005)</li>
</ul>
<p>In my case restarting Visual Studio causes it to get its head out of it's own assembler.</p>
<p>Someone phrase those in the form of an answer, and get free rep. (<a href="http://blog.stackoverflow.com/2011/07/its-ok-to-ask-and-answer-your-own-questions/">SO prevents me from posting my own answer</a>).</p>
| 0non-cybersec
| Stackexchange | 286 | 920 |
RTF blob - what am I missing?. <p>I'm working on an extension to a legacy database application. Specifically, I need to be able to add entries to a notes system.</p>
<p>Using SSMS, I can see that existing notes are stored in a table that has a column for the formatted text of the note. This column is of type "image" and the contents appear to be an RTF document. E.g.:</p>
<pre><code>?{\rtf1\ansi\ansicpg1252\deff0{\fonttbl{\f0\fnil\fcharset0 MS Sans Serif;}}
\viewkind4\uc1\pard\lang2057\f0\fs20 Text needs to go here
\par }
</code></pre>
<p>From here, I thought it would be fairly easy to modify the text. Surely something like the following would work?</p>
<pre><code>UPDATE ConstituentNotepad SET Notes = CONVERT(image,'?{\rtf1\ansi\ansicpg1252\deff0{\fonttbl{\f0\fnil\fcharset0 MS Sans Serif;}}
\viewkind4\uc1\pard\lang2057\f0\fs20 Good text needs to go here
\par }
') WHERE NotesId = 35416
</code></pre>
<p>Alas no. After executing the update, the note now shows the raw RTF markup rather than the properly rendered text.</p>
<p>I presume I'm mangling the RTF somehow when converting / updating. Am I doing something obviously wrong? How would you approach this?</p>
| 0non-cybersec
| Stackexchange | 382 | 1,181 |
Using KDF output for password validation. <p>I am currently revising an <a href="https://github.com/RNCryptor/RNCryptor-Spec/blob/master/draft-RNCryptor-Spec-v4.0.md" rel="nofollow">AES data format</a>. I would like to determine whether a provided password/key is incorrect. Previously this was done by validating the HMAC, but this makes it impossible to distinguish between data corruption and a bad password. It also requires reading the entire stream before validating the password, which is problematic.</p>
<p>My new design is as follows (the HMAC step is HKDF):</p>
<pre><code>prk = PBKDF2(SHA512, password, salt, rounds, 512 bits)
(validator[16], iv[16]) = HMAC(SHA512, prk, "rncryptor.validator+iv" || 0x01, 256 bits)
</code></pre>
<p>The validator is 16 bytes that are written to the header. During decryption, I recompute the validator to check the password before proceeding.</p>
<p>I believe this scheme is secure. Common best-practice for password validation is a salted and stretched hash. I believe HKDF is providing the same. My one slight concern is <a href="http://csrc.nist.gov/publications/nistpubs/800-56A/SP800-56A_Revision1_Mar08-2007.pdf" rel="nofollow">NIST SP 800-56a, Section 5.8</a>:</p>
<blockquote>
<p>An Approved key derivation function (KDF) shall be used to derive secret keying material from a shared secret. The output from a KDF shall only be used for secret keying material, such as a symmetric key used for data encryption or message integrity, a secret initialization vector, or a master key that will be used to generate other keys (possibly using a different process). Non- secret keying material (such as a non-secret initialization vector) shall not be generated using the shared secret.</p>
</blockquote>
<p>The validator is not "keying material" at all, so I don't believe this is relevant, but I don't understand the restriction even for "a non-secret initialization vector." Why would it be dangerous to use a proper, salted KDF to generate a non-secret IV? Does this impact my use as a key/password validator?</p>
| 0non-cybersec
| Stackexchange | 576 | 2,071 |
How to use spot instance with amazon elastic beanstalk?. <p>I have one infra that use amazon elastic beanstalk to deploy my application.
I need to scale my app adding some spot instances that EB do not support.</p>
<p>So I create a second autoscaling from a launch configuration with spot instances.
The autoscaling use the same load balancer created by beanstalk.</p>
<p>To up instances with the last version of my app, I copy the user data from the original launch configuration (created with beanstalk) to the launch configuration with spot instances (created by me).</p>
<p>This work fine, but:</p>
<ol>
<li><p>how to update spot instances that have come up from the second autoscaling when the beanstalk update instances managed by him with a new version of the app?</p>
</li>
<li><p>is there another way so easy as, and elegant, to use spot instances and enjoy the benefits of beanstalk?</p>
</li>
</ol>
<p><strong>UPDATE</strong></p>
<p>Elastic Beanstalk add support to spot instance since 2019... see:
<a href="https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html</a></p>
| 0non-cybersec
| Stackexchange | 349 | 1,234 |
550 Invalid HELO/EHLO must contain a FQDN or IPv6. <p>I've got a Windows Server 2008 box where I host a number of websites (on different domains) that send email as part of their functionality.</p>
<p>I've been checking up on the SMTP events and found a number of warnings that look like this:</p>
<blockquote>
<p>Message delivery to the host '219.88.242.10' failed while delivering to the remote domain 'orcon.net.nz' for the following reason: An SMTP protocol error occurred.
The SMTP verb which caused the error is 'HELO'. The response from the remote server is '550 Invalid HELO/EHLO must contain a FQDN or IPv6 literal in [].
'.</p>
</blockquote>
<p>What does this mean?</p>
<p>I guess it has something to do with my SMTP setup. I'm just using the default SMTP server that comes with Windows.</p>
<p>If it is to do with my setup, is there anything else I should do to setup the SMTP server? </p>
<p>Cheers,<br>
Charles</p>
<p>P.s. Is there a better (free) SMTP server I should be looking at? I'm using google apps for email so I don't need to receive emails, just send them.</p>
| 0non-cybersec
| Stackexchange | 330 | 1,099 |
Is it possible to run an ARM64 vagrant instance on the x86_64 host. <p>I'm trying to run an ARM64 Ubuntu VM on an x86_64 host with vagrant for development purposes. I searched the vagrant box on their website only found this one: </p>
<p><a href="https://app.vagrantup.com/boxes/search?provider=libvirt&q=arm64&sort=downloads&utf8=%E2%9C%93" rel="nofollow noreferrer">https://app.vagrantup.com/boxes/search?provider=libvirt&q=arm64&sort=downloads&utf8=%E2%9C%93</a></p>
<p>However, I failed to bring that VM up (using <code>vagrant up --provider libvirt</code>) as it seems using the <code>qemu-system-x86_64</code> as the simulator instead of the <code>qemu-system-aarch64</code>. The vagrantfile I used：</p>
<pre><code>Vagrant.configure("2") do |config|
config.vm.box = "MalibuKoKo/ubuntu-18.04.3-server-arm64-raspberry-4"
config.vm.define "ubuntu18.04-aarch64"
config.vm.provider :libvirt do |libvirt|
libvirt.machine_arch = "aarch64"
libvirt.uri = 'qemu:///system'
libvirt.emulator_path = "/usr/bin/qemu-system-aarch64"
end
end
</code></pre>
<p>Any suggestion how to bring it up? Thanks</p>
| 0non-cybersec
| Stackexchange | 426 | 1,143 |
Interconnection of a Midi music keyboard from its DIN5 socket to USB input on my Laptop. <p>I have an old Evolution Mk149 music keyboard which has a DIN 5 connector at the keyboard and a 15 pin 'D'connector at the other end. On my new laptop computer there are no compatable connections. As the keyboard needs to draw power through its interconnecting cable, would a connecting lead of Din 5 to USB provide a working solution? If so, Where can I get one? I have searched the web and not found one.
Question 571252 gets close to my problem but involves an old text keyboard. </p>
| 0non-cybersec
| Stackexchange | 144 | 585 |
Can one make a secure AEAD from any secure cipher and any secure MAC?. <p>Can one make a secure AEAD from any secure cipher and any secure MAC using encrypt-then-MAC:</p>
<ul>
<li>with independent keys and IVs (any cipher and MAC)</li>
<li>if the cipher is a stream cipher (including a block cipher in CTR mode), using parts of the keystream (not used to encrypt plaintext) as the MAC key or keys and IV?</li>
</ul>
<p>If so, then all of the following would be secure:</p>
<ul>
<li>A stream cipher plus GHASH (of which GCM becomes a special case), with the stream cipher being used to mask the GHASH output.</li>
<li>A stream cipher plus any other Wegman-Carter authenticator, such as Poly1305, again with the stream cipher used to mask the output</li>
<li>A stream cipher plus HMAC.</li>
</ul>
<p>Proof of the first two cases: since encrypt-then-MAC is secure we need only to show that</p>
<ol>
<li>this is in fact an encrypt-then-MAC construction.</li>
<li>that the MAC is secure (we already know by assumption that the stream cipher is secure).</li>
</ol>
<p>Firstly, we can assume that the parts of the keystream used for the MAC and to encrypt plaintext are independent, as any dependencies would be a distinguisher against the stream cipher. Therefore:</p>
<ul>
<li><ol>
<li>is true because the construction uses a stream cipher to encrypt the plaintext, then applies a MAC to the ciphertext.</li>
</ol></li>
<li><ol start="2">
<li>is true because the stream cipher is a secure PRF, so there is no way (for a resource-bounded attacker) to compute the (secret) MAC key (and block used to encrypt the MAC) from the (potentially known to attacker) part of the keystream used to encrypt plaintext. Therefore, the attacker has no knowledge of the internal state of the MAC, and so the composition is secure if the MAC is. For most Carter-Wegnam MACs, this is known unconditionally.</li>
</ol></li>
</ul>
<p>I have seen various special cases proven secure, but not the general case.</p>
| 0non-cybersec
| Stackexchange | 563 | 1,998 |
Are there any security hazards to installing Ubutnu for Windows 10?. <p>I only want a bash shell in Windows 10 that runs faster and doesn't have any of the quirks of git bash / MINGW64, like for instance all of that CRLF garbage. </p>
<p>Is there any security harm in installing it? I mean I'm sure depending on what you install with apt-get there could be issues, but what if you're just installing <a href="https://tutorials.ubuntu.com/tutorial/tutorial-ubuntu-on-windows#0" rel="nofollow noreferrer">Ubuntu for Windows 10</a> and git?</p>
<p>I noticed that I could not run <code>iptables -L</code> I got some error:</p>
<pre><code>iptables v1.6.1: can't initialize iptables table `filter': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.
</code></pre>
| 0non-cybersec
| Stackexchange | 242 | 812 |
How to use spot instance with amazon elastic beanstalk?. <p>I have one infra that use amazon elastic beanstalk to deploy my application.
I need to scale my app adding some spot instances that EB do not support.</p>
<p>So I create a second autoscaling from a launch configuration with spot instances.
The autoscaling use the same load balancer created by beanstalk.</p>
<p>To up instances with the last version of my app, I copy the user data from the original launch configuration (created with beanstalk) to the launch configuration with spot instances (created by me).</p>
<p>This work fine, but:</p>
<ol>
<li><p>how to update spot instances that have come up from the second autoscaling when the beanstalk update instances managed by him with a new version of the app?</p>
</li>
<li><p>is there another way so easy as, and elegant, to use spot instances and enjoy the benefits of beanstalk?</p>
</li>
</ol>
<p><strong>UPDATE</strong></p>
<p>Elastic Beanstalk add support to spot instance since 2019... see:
<a href="https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html</a></p>
| 0non-cybersec
| Stackexchange | 349 | 1,234 |
Include & in label. <p>Here is a MWE to illustrate a problem I encounter when I try to include an & in a label. Any ideas how to fix this?</p>
<pre><code>\documentclass[14pt,a4paper]{extreport}
\usepackage[latin9]{inputenc}
\newcounter{SlideCounter}
\newcommand{\slide}[1]{%
\stepcounter{SlideCounter}%
\paragraph{\newline Slide \arabic{SlideCounter}) #1}
\paragraph{\newline}}
\begin{document}
I have a document in which I refer to numbered `slides' and I want to label
the slides to help navigate the document in TeXstudio. TeXstudio has a
document structure window which shows the labels. However, if I include
\& in the label, as in:
\begin{verbatim}
\label{Alvarado Rudy \& design and procedure}
\end{verbatim}
I get the message: \\
\begin{verbatim}
! Missing \endcsname inserted.
<to be read again>
\&
l.3 ...varado \& Rudy design and procedure}{{}{1}}
The control sequence marked <to be read again> should
not appear between \csname and \endcsname.
LaTeX Warning: Label(s) may have changed. Rerun to get cross-references right.
\end{verbatim}
\slide{Alvarado \& Rudy design and procedure}
\label{Alvarado Rudy design and procedure}
\slide{Next Slide}
\label{Next Slide}
\end{document}
</code></pre>
| 0non-cybersec
| Stackexchange | 422 | 1,259 |
Mouse controlled first person movement JS. <p>I'm trying to implement a first person movement using the mouse.
I do have it working with keyboard yet I'm having difficulties implementing it using mouse since movement to a specific side isn't that clear (i.e moving left can include moving up or down).
I want to use the <code>matrix3d</code> in order to receive changed values of the position.</p>
<p><strong>EDIT #2</strong> Here is a <a href="http://jsfiddle.net/WQeHb/">jsfiddle</a>.</p>
<p><strong>EDIT</strong> I've pasted the new code I've managed to resolve:</p>
<pre><code>$(document).on('mousemove', function (e) {
var MOVE = 10; // how much to move
var XTURN = 1; // how much to rotate
var YTURN = 1; // how much to rotate
var transformer, origMat, translationMatrix, result;
transformer = document.getElementById("transformer");
if ($.browser.webkit)
origMat = new WebKitCSSMatrix(window.getComputedStyle(transformer).webkitTransform);
//turn left
if (e.pageX < xPrev) {
if (XTURN < 0) {
XTURN *= -1;
}
xPrev = e.pageX;
//turn right
} else {
if (XTURN > 0) {
XTURN *= -1;
}
xPrev = e.pageX;
}
//look up
if (e.pageY < yPrev) {
if (YTURN < 0) {
YTURN *= -1;
}
yPrev = e.pageY;
//look down
} else {
if (YTURN > 0) {
YTURN *= -1;
}
yPrev = e.pageY;
}
translationMatrix = new WebKitCSSMatrix("matrix3d(" + cos(XTURN).toFixed(10) + ",0," + sin(XTURN).toFixed(10) + ",0,0,"+ cos(-YTURN).toFixed(10) +","+ sin(YTURN).toFixed(10) +",0, " + sin(-XTURN).toFixed(10) + ","+ sin(-YTURN).toFixed(10) +"," + cos(XTURN).toFixed(10) + ",0,0,0,0,1)");
transformer.style.webkitTransform = translationMatrix.multiply(origMat).toString();
});
</code></pre>
<p>As you can see (Sorry for the one line matrix) I'm stating the changes of the X and Y rotations on the same matrix change and then committing it, the issue now is with the <code>cos(XTURN).toFixed(10)</code> which can be related to the X and Y rotations, so you can see it works but not perfect.
Would appreciate any tips/ideas.</p>
<p>P.S I don't want to use the <a href="http://www.html5rocks.com/en/tutorials/pointerlock/intro/">Pointer Lock API</a>, even though it's great, since I want it to support maximal number of browsers.</p>
| 0non-cybersec
| Stackexchange | 794 | 2,584 |
What is `gpytorch.settings.max_preconditioner_size`? And `gpytorch.beta_features.checkpoint_kernel(checkpoint_size)`?. <p>I am following the tutorial <a href="https://gpytorch.readthedocs.io/en/latest/examples/01_Simple_GP_Regression/Simple_MultiGPU_GP_Regression.html" rel="nofollow noreferrer">Simple_MultiGPU_GP_Regression</a> and I noticed that during the training two options were established:</p>
<pre><code> with gpytorch.beta_features.checkpoint_kernel(checkpoint_size), \
gpytorch.settings.max_preconditioner_size(preconditioner_size):
</code></pre>
<p>What are or refer to the variables <code>checkpoint_kernel</code> and <code>preconditioner_size</code>?</p>
<p>I have check the documentation <a href="https://gpytorch.readthedocs.io/en/latest/settings.html#gpytorch.settings.max_preconditioner_size" rel="nofollow noreferrer">preconditioner_size</a> but it is not quite clear to me what it refers to. </p>
<p>I intuit that <code>checkpoint_size</code> refers to something related to the number of training points associated with each GPU. But it is just an intuition.</p>
<p>Help is appreciated. </p>
<p>Thanks</p>
| 0non-cybersec
| Stackexchange | 379 | 1,145 |
Easiest way of shutting down a PostgreSQL server on Ubuntu. <p>According to <strong>pg_lsclusters</strong> I have 2 servers running on Ubuntu 14.04:</p>
<pre><code> Ver Cluster Port Status Owner Data directory Log file
9.1 main 5432 online postgres /var/lib/postgresql/9.1/main /var/log/postgresql/postgresql-9.1-main.log
9.3 main 5433 online postgres /var/lib/postgresql/9.3/main /var/log/postgresql/postgresql-9.3-main.log
</code></pre>
<p>What is the easiest way of shutting down the 9.1 server forever?</p>
<p>Using:</p>
<pre><code> $/usr/lib/postgresql/9.1/bin/pg_ctl stop
</code></pre>
<p>I get the error:</p>
<pre><code> pg_ctl: kein Datenbankverzeichnis angegeben und Umgebungsvariable PGDATA nicht gesetzt
</code></pre>
<p>(no database directory given and environment variable PGDATA not set)</p>
<p>What is the meaning of this error?</p>
| 0non-cybersec
| Stackexchange | 319 | 896 |
Push, college and reading. I’m on medication that doesn’t allow me to drink alcohol, which kinda ruins Friday nights for this college student lol. Mostly I’ve been watching tv or writing, but tonight I picked up Push by Sapphire and read the whole thing in a couple hours.
I’ve always loved reading and writing (the first thing I got for my apartment was a bookshelf for my favorites), but it felt really good to fall in love with a book again. To get that rush and excitement with each page turn, to start having voices in my head for each character.
So to college students who maybe don’t read as much as they want to- just try it out! It’s totally understandable if you’re tired or don’t want to exercise your brain too much. But it’s also nice to carry a book around with you and instead of scrolling through Instagram posts about people you don’t really care about it, maybe read a bit from a book.
Also- Push is freaking phenomenal. Incredibly disturbing. Incredibly emotional. I still need to process all of it. | 0non-cybersec
| Reddit | 244 | 1,025 |
Configure input_map when importing a tensorflow model from metagraph file.
<p>I've trained a DCGAN model and would now like to load it into a library that visualizes the drivers of neuron activation through image space optimization.</p>
<p>The following code works, but forces me to work with (1, width, height, channels) images when doing subsequent image analysis, which is a pain (the library assumptions about the shape of network input).</p>
<pre class="lang-py prettyprint-override"><code># creating TensorFlow session and loading the model
graph = tf.Graph()
sess = tf.InteractiveSession(graph=graph)
new_saver = tf.train.import_meta_graph(model_fn)
new_saver.restore(sess, './')
</code></pre>
<p>I'd like to change the input_map, After reading the source, I expected this code to work:</p>
<pre class="lang-py prettyprint-override"><code>graph = tf.Graph()
sess = tf.InteractiveSession(graph=graph)
t_input = tf.placeholder(np.float32, name='images') # define the input tensor
t_preprocessed = tf.expand_dims(t_input, 0)
new_saver = tf.train.import_meta_graph(model_fn, input_map={'images': t_input})
new_saver.restore(sess, './')
</code></pre>
<p>But got an error:</p>
<blockquote>
<p>ValueError: tf.import_graph_def() requires a non-empty <code>name</code> if <code>input_map</code> is used.</p>
</blockquote>
<p>When the stack gets down to <code>tf.import_graph_def()</code> the name field is set to import_scope, so I tried the following:</p>
<pre class="lang-py prettyprint-override"><code>graph = tf.Graph()
sess = tf.InteractiveSession(graph=graph)
t_input = tf.placeholder(np.float32, name='images') # define the input tensor
t_preprocessed = tf.expand_dims(t_input, 0)
new_saver = tf.train.import_meta_graph(model_fn, input_map={'images': t_input}, import_scope='import')
new_saver.restore(sess, './')
</code></pre>
<p>Which netted me the following <code>KeyError</code>:</p>
<blockquote>
<p>KeyError: "The name 'gradients/discriminator/minibatch/map/while/TensorArrayWrite/TensorArrayWriteV3_grad/TensorArrayReadV3/RefEnter:0' refers to a Tensor which does not exist. The operation, 'gradients/discriminator/minibatch/map/while/TensorArrayWrite/TensorArrayWriteV3_grad/TensorArrayReadV3/RefEnter', does not exist in the graph."</p>
</blockquote>
<p>If I set 'import_scope', I get the same error whether or not I set 'input_map'. </p>
<p>I'm not sure where to go from here.</p>
| 0non-cybersec
| Stackexchange | 785 | 2,418 |
How to update Owin access tokens with refresh tokens without creating new refresh token?. <p>I've managed to get a simple example code that can create a bearer token and also request new ones by refresh token by reading other forums here on stackoverflow. </p>
<p>The startup class looks like this</p>
<pre><code>public class Startup
{
public static void Configuration(IAppBuilder app)
{
app.UseOAuthBearerAuthentication(
new OAuthBearerAuthenticationOptions());
app.UseOAuthAuthorizationServer(
new OAuthAuthorizationServerOptions
{
TokenEndpointPath = new PathString("/Token"),
Provider = new OAuthAuthorizationServerProvider()
{
OnValidateClientAuthentication = async c =>
{
c.Validated();
},
OnGrantResourceOwnerCredentials = async c =>
{
if (c.UserName == "alice" && c.Password == "supersecret")
{
Claim claim1 = new Claim(ClaimTypes.Name, c.UserName);
Claim[] claims = new Claim[] { claim1 };
ClaimsIdentity claimsIdentity =
new ClaimsIdentity(
claims, OAuthDefaults.AuthenticationType);
c.Validated(claimsIdentity);
}
}
},
AccessTokenExpireTimeSpan = TimeSpan.FromSeconds(40),
AllowInsecureHttp = true,
RefreshTokenProvider = new ApplicationRefreshTokenProvider()
});
}
}
</code></pre>
<p>And i also have a class for refresh tokens that looks like this:</p>
<pre><code>public class ApplicationRefreshTokenProvider : AuthenticationTokenProvider
{
public override void Create(AuthenticationTokenCreateContext context)
{
// Expiration time in seconds
int expire = 2 * 60;
context.Ticket.Properties.ExpiresUtc = new DateTimeOffset(DateTime.Now.AddSeconds(expire));
context.SetToken(context.SerializeTicket());
}
public override void Receive(AuthenticationTokenReceiveContext context)
{
context.DeserializeTicket(context.Token);
}
}
</code></pre>
<p>The way i understand it is that by providing a <strong>refresh token</strong> you should get a new <strong>access token</strong>. However what happends in this code is that when i provide a <strong>refresh token</strong> a new <strong>refresh token</strong> is created and returned aswell. I want it to create both a <strong>access</strong> and <strong>refresh token</strong> the first time when username/password is provided but it doesn't seem correct to create new <strong>refresh tokens</strong> everytime a request for a new <strong>access token</strong> is made by using <strong>refresh token</strong>? </p>
<p>If i for instance, given my code, have a 20 min timespan on the <strong>access token</strong> and two weeks on the <strong>refresh tokens</strong>, new <strong>access tokens</strong> could be created every 20 min which is good, however new <strong>refresh tokens</strong> would also be created every 20 min but last 2 weeks. Alot of <strong>refresh tokens</strong> would then be created but not used. </p>
<p><strong>Question:</strong> </p>
<p>I just started reading/learning about this a few hours ago so i'm quite unsure but is this the correct behavior or am i supposed to cange my code in some way to only create and return a new <strong>access token</strong> when a <strong>refresh token</strong> is provided and not create and return a new <strong>refresh token</strong> also? Any help or input is highly appreciated, thanks! </p>
| 0non-cybersec
| Stackexchange | 927 | 4,151 |
boost::deadline_timer can fail when system clock is modified. <p>As could be read at:</p>
<p><a href="https://svn.boost.org/trac/boost/ticket/3504">https://svn.boost.org/trac/boost/ticket/3504</a></p>
<p>a deadline_timer that timeouts periodically and which is implemented using deadline_timer::expires_at() (like the example in <a href="http://www.boost.org/doc/libs/1_40_0/doc/html/boost_asio/tutorial/tuttimer3/src.html">Boost Timer Tutorial, 3th example</a>) will probably fail if the system time is modified (for example, using the date command, if your operating system is Linux).</p>
<p>Is there a simple and appropiate way of performing this operation now, using Boost? I do not want to use deadline_timer::expires_from_now() because I could verify that it is less accurate than "manually" updating the expiry time.</p>
<p>As a temporal solution I decide to, before setting a new expires_at value, calculate the time period between now() and expires_at(). If it is more than double the periodic delay, then I exceptionally use expires_from_now() to resync with the new absolute time. </p>
| 0non-cybersec
| Stackexchange | 320 | 1,101 |
How do I make a VMWare VM not be running on a snapshot?. <p>I'm not sure I understand snapshots. I took a snapshot of a VM on ESXi. The Snapshot manager in VSPhere show the tree and at the bottom of that three is "You are here." It is underneath the snapshots. I only wanted the snapshot for a supplementary backup.</p>
<p>Why wouldn't "You are here" be at the top? I never told it to run on snapshot x. I need to be able to provision more space for the Virtual Disk but cannot because (I think) I am running on a snapshot.</p>
| 0non-cybersec
| Stackexchange | 148 | 535 |
18.04 is slow in VirtualBox—how to make is usable?. <p>I run Ubuntu in VirtualBox. 18.04 is considerably less responsive than 16.04, with exactly the same VM settings (3D acceleration, 3 cores, 4 GB RAM, guest additions installed, host: macOS, VirtualBox 5.2.18).</p>
<p>18.04 is often slow to respond to clicks and even typing. It is borderline unusable. 16.04, on the other hand, works perfectly fine. The 18.04 is a fresh install.</p>
<p>Is this considerable performance drop an inevitable consequence of switching to Gnome 3? Are there any simple settings I can try to make it usable? I do not need animations or fancy visual effects—this in an OS in a VM so it gets only occasional use, and I mostly just need the terminal.</p>
<hr>
<p><strong>More details:</strong></p>
<ul>
<li><p>Right after boot, performance is satisfactory</p></li>
<li><p>After opening a Terminal, <em>and maximizing it</em>, performance becomes awful. It does not recover even after unmaximizing the Terminal window, or closing it.</p></li>
<li><p>Turning <em>off</em> 3D acceleration in VirtualBox makes is more sluggish after startup (e.g. moving window on the screen is choppy), but it never gets <em>unusably</em> slow after maximizing a window.</p></li>
</ul>
| 0non-cybersec
| Stackexchange | 356 | 1,253 |
How to use spot instance with amazon elastic beanstalk?. <p>I have one infra that use amazon elastic beanstalk to deploy my application.
I need to scale my app adding some spot instances that EB do not support.</p>
<p>So I create a second autoscaling from a launch configuration with spot instances.
The autoscaling use the same load balancer created by beanstalk.</p>
<p>To up instances with the last version of my app, I copy the user data from the original launch configuration (created with beanstalk) to the launch configuration with spot instances (created by me).</p>
<p>This work fine, but:</p>
<ol>
<li><p>how to update spot instances that have come up from the second autoscaling when the beanstalk update instances managed by him with a new version of the app?</p>
</li>
<li><p>is there another way so easy as, and elegant, to use spot instances and enjoy the benefits of beanstalk?</p>
</li>
</ol>
<p><strong>UPDATE</strong></p>
<p>Elastic Beanstalk add support to spot instance since 2019... see:
<a href="https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html</a></p>
| 0non-cybersec
| Stackexchange | 349 | 1,234 |
NoRouteToHostException on client or server?. <p>I am getting</p>
<pre><code>Caused by: java.net.NoRouteToHostException: No route to host
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:529)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:564)
at sun.reflect.GeneratedMethodAccessor638.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.commons.httpclient.protocol.ReflectionSocketFactory.createSocket(ReflectionSocketFactory.java:140)
at org.apache.commons.httpclient.protocol.SSLProtocolSocketFactory.createSocket(SSLProtocolSocketFactory.java:130)
at org.apache.commons.httpclient.HttpConnection.open(HttpConnection.java:707)
at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:387)
at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:323)
</code></pre>
<p><a href="http://docs.oracle.com/javase/6/docs/api/java/net/NoRouteToHostException.html" rel="noreferrer">javadoc</a> says </p>
<blockquote>
<p>Signals that an error occurred while attempting to connect a socket to
a remote address and port. Typically, the remote host cannot be
reached because of an intervening firewall, or if an intermediate
router is down.</p>
</blockquote>
<p>Is this error on client side or remote side or it can be either of these?</p>
| 0non-cybersec
| Stackexchange | 592 | 1,926 |
Using ActiveSheet.Shapes("Fotos_Campo").Fill.UserPicture. <p>I'm using <code>ActiveSheet.Shapes</code> to show the image in a shape in Excel, but it's not working. </p>
<p>I named the shape "Fotos Campo".
I'm using a Macbook Pro 2019.</p>
<pre><code>Sub carrega_foto()
'/Users/raphaelperciliano/Desktop/Teste/imagem
Range("H4") = ThisWorkbook.Path & "/imagem/foto" & Range("H2") & ".png"
ActiveSheet.Shapes("Fotos_Campo").Fill.UserPicture Range("H4")
End Sub
</code></pre>
| 0non-cybersec
| Stackexchange | 195 | 510 |
Why can we disentangle the squeezing operator $\exp[\frac12(\xi a^{\dagger 2}-\xi^* a^2)]$ via the $\mathfrak{su}(1,1)$ algebra?. <p>In the context of quantum mechanics, we define the <a href="https://en.wikipedia.org/wiki/Squeeze_operator" rel="nofollow noreferrer">squeezing operator</a> <span class="math-container">$S(\xi)$</span> as:
<span class="math-container">$$S(\xi)\equiv \exp[\frac12(\xi a^{\dagger 2}-\xi^* a^2)],$$</span>
where <span class="math-container">$a^\dagger$</span> and <span class="math-container">$a$</span> are the so-called <em>creation</em> and <em>annihilation</em> operators, which satisfy <span class="math-container">$[a,a^\dagger]=1$</span>.</p>
<p>It is often convenient to consider the <em>disentangled form</em> of <span class="math-container">$S(\xi)$</span>, that is, to split the operator into an exponential involving only <span class="math-container">$a^{\dagger 2}$</span> and one involving only <span class="math-container">$a^2$</span>. This can be done as following:
<span class="math-container">$$S(r e^{i\theta})=
\exp\left[\frac12e^{i\theta}\tanh(r) a^{\dagger 2}\right]
\exp\left[-\ln\cosh(r) \left(a^\dagger a+\frac12\right)\right]
\exp\left[-\frac12e^{-i\theta}\tanh(r) a^{2}\right].
$$</span></p>
<p>This result is obtained via the following observations (see also <a href="https://physics.stackexchange.com/a/416126/58382">here</a> for more details):</p>
<ol>
<li>Define <span class="math-container">$K_+\equiv \frac12 a^{\dagger 2}$</span> and <span class="math-container">$K_-\equiv K_+^\dagger=\frac12 a^2$</span>, and observe that
<span class="math-container">$$[K_-,K_+]=\frac12(1+2 a^\dagger a)\equiv K_0 \quad\text{ and }\quad
[K_0,K_\pm]=\pm2 K_\pm.$$</span></li>
<li>Observe that these define the <span class="math-container">$\mathfrak{su}(1,1)$</span> Lie algebra, a faithful representation for which is given in terms of the Pauli matrices:
<span class="math-container">$$i\sigma_-\equiv\begin{pmatrix}0 & 0 \\ i & 0\end{pmatrix}=K_-,
\qquad i\sigma_+\equiv\begin{pmatrix}0 & i \\ 0 & 0\end{pmatrix}=K_+, \\
\sigma_3 = \begin{pmatrix}1 & 0 \\ 0 & -1\end{pmatrix}= K_0.$$</span></li>
<li>Using this representation in terms of <span class="math-container">$2\times2$</span> matrices, we compute the matrix exponential <span class="math-container">$\exp[i(\xi \sigma_+ - \xi^* \sigma_-)]$</span> using standard techniques.</li>
<li>We use Gauss decomposition to write the resulting matrix as product of matrices which correspond to exponentials of the original operators.</li>
</ol>
<p>My question relates to the mathematical justification behind this procedure.
I understand that the representation of the operators in terms of <span class="math-container">$2\times2$</span> matrices is faithful, but that only relates to the <em>commutators</em>, the operators themselves don't behave the same way. So why should we expect to be able to compute the exponential in the representation and then convert the results back into the original operators?</p>
| 0non-cybersec
| Stackexchange | 976 | 3,043 |
closed formula for: $(g\partial)^n$. <p>The <strong>objective</strong> is to obtain a closed formula for:
<span class="math-container">$$
\boxed{A(n)=\big(g(z)\,\partial_z\big)^n,\qquad n=1,2,\dots}
$$</span>
where <span class="math-container">$g(z)$</span> is smooth in <span class="math-container">$z$</span> and <span class="math-container">$\partial_z$</span> is a derivative with respect to <span class="math-container">$z$</span>.
I think the first few terms are,
<span class="math-container">\begin{equation}
\begin{aligned}
A(1) &= g\,\partial\\
A(2)&= g\,(\partial g)\,\partial+g^2\,\partial^2\\
A(3)&= \big[(\partial^2g)g^2+(\partial g)^2g\big]\partial+3(\partial g)g\,\partial^2+g^2\partial^3\\
A(4) &= \big[(\partial^3g)g^3+4(\partial^2g)(\partial g)g^2+(\partial g)^3g\big]\partial\\
&\quad +\big[4(\partial^2g)g^3+7(\partial g)^2g^2\big]\partial^2+6(\partial g)g^3\partial^3+g^4\partial^4\\
&\,\,\vdots
\end{aligned}
\end{equation}</span>
and presumably there is a simple pattern that I'm failing to see. The coefficients do not seem (to me) to be associated to a special function (such as a Bell polynomial) in a simple way.</p>
<p>Any ideas? Perhaps there is a standard formula? </p>
<p>Thanks!</p>
| 0non-cybersec
| Stackexchange | 467 | 1,242 |
How do I insert a variable image file in a rmarkdown pdf. <p>The problem is simple - How do I insert a variable filename into an rmarkdown PDF? I want to do this:</p>
<pre><code>---
FNL = "image.png"
---
</code></pre>
<p>only I need to pass in the value for FNL when calling rmarkdown::render</p>
<p>The purpose is to give the image a unique ID so that users get images marked for their session.</p>
<p>Anyone able to help with this?</p>
| 0non-cybersec
| Stackexchange | 150 | 469 |
Sql server partitioned table: what happens when an update of a record changes the destination partition?. <p>I my company we are facing performance issues on a big Sql server DB (running on Azure, total size > 150GB).</p>
<p>We have one big table (1,5GB, 3 millions records) that has several quite slow "select".</p>
<p>Those records have an "insert date" and I know that it is easy to make partitions based on date.</p>
<p>But I am exploring a different idea.</p>
<p>I have a "Status" column that can have different values, one of them is "Closed" and different other values that I'll call "Open".
My idea is to add a calculated persisted column with a value that can be "Open" or "Closed", i'll call it OpenClosedStatus.</p>
<p>"Closed tickets" continue to be accumulate and are rarely (if ever) read again, instead "open" tickets are normally less than 100 so having a dedicated partition should allow extremely fast read of their values.
Please note: the record is inserted once, selected potentially several hundred times and finally updated once (the update sets the "closed" status).</p>
<p>It is very complex to make proper indexes to speed up the several selects on the "Open" tickets because we have hundreds of instances of different programs that read "open" tickets accordingly with different criteria, therefore I am considering to partition them accordingly with the OpenClosedStatus.</p>
<p>This idea implies that a ticket is always inserted in the "Open" partition, then it should be transferred to the "Closed" partition when the status is updated as closed. The "OpenClosedStatus" will always be used in the WHERE clause of our queries, at least when searching for "open" tickets (therefore going on the small partition).</p>
<p>I do not find a reference of this "dynamic change" of partition on update of the record, I am therefore looking for advice for or against this atypical usage or partitions.</p>
| 0non-cybersec
| Stackexchange | 519 | 2,098 |
How to use spot instance with amazon elastic beanstalk?. <p>I have one infra that use amazon elastic beanstalk to deploy my application.
I need to scale my app adding some spot instances that EB do not support.</p>
<p>So I create a second autoscaling from a launch configuration with spot instances.
The autoscaling use the same load balancer created by beanstalk.</p>
<p>To up instances with the last version of my app, I copy the user data from the original launch configuration (created with beanstalk) to the launch configuration with spot instances (created by me).</p>
<p>This work fine, but:</p>
<ol>
<li><p>how to update spot instances that have come up from the second autoscaling when the beanstalk update instances managed by him with a new version of the app?</p>
</li>
<li><p>is there another way so easy as, and elegant, to use spot instances and enjoy the benefits of beanstalk?</p>
</li>
</ol>
<p><strong>UPDATE</strong></p>
<p>Elastic Beanstalk add support to spot instance since 2019... see:
<a href="https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html</a></p>
| 0non-cybersec
| Stackexchange | 349 | 1,234 |
spring/application.rb:161 undefined method `reject!' for nil:NilClass (NoMethodError). <p>I am using ruby 2.5 and rails 5.0.1 for my application. when i try to run console or generate controller or migration it gives me this error:</p>
<p><code>Running via Spring preloader in process 6473
Loading development environment (Rails 5.0.1)
Traceback (most recent call last):
/home/abwahed/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/spring-2.0.1/lib/spring/application.rb:161:in</code>fork': undefined method <code>reject!' for nil:NilClass (NoMethodError)</code></p>
| 0non-cybersec
| Stackexchange | 185 | 572 |
DNS Over VPN Tunnel Won't Resolve. <p>We have a site to site tunnel with using a Meraki router to the Google Cloud. Pings and normal traffic flows between the two sites. The server on the Google Cloud side is a domain controller running DNS. However, the Google side of the tunnel will not return queries.</p>
<p>We did packet captures on the Meraki side and they show that the traffic is leaving over the tunnel but there's no response. I verified that I have the following in the firewall section on Google's side:</p>
<p>vpn-dns Ingress Apply to all
IP ranges: 0.0.0.0/24 tcp:53, udp:53
Allow 65534 default</p>
<p>Thoughts on what may be missing or how to pinpoint? The domain controller has all firewalls turned off. You can RDP to it and ping it from the remote location as well.</p>
| 0non-cybersec
| Stackexchange | 217 | 796 |
Drug test in 7-8 days, have been researching, but was hoping for some information specialized to my situation?. Well, I'm in a bit of a panic and all because of my own stupidity. The last I smoked weed was either the 26th or the 27th (3-4 days ago). I have my test on May 7th or 8th (7-8 days from now).
Prior to that I have myself documented smoking the 25th, the 24th (very beginning of day 12:01 am), towards the end of the day on the 19th, the 18th, the 12th, the 11th, the 8th, the 6th and the 1st of April.
To clarify, I've never actually smoked. I have only vaped very loose packs in my arizer solo stem. I already drink 64 - 90 fl ozs of water every day and exercise every other day (have been doing this for months).
This is the most I've ever smoked and my test was supposed to be over two months from now.
From my research the following questions are unclear regarding my specific situation. Could you please help answer my questions?
1)Worth buying an at home drug test? I'd like to see if I'm clean before I go in, but I hear these are poor indicators.
2)Best plan up until the day before the test?
I know there is some mix of b vitamins I should be taking. What about Niacin? I will continue exercising and drinking lots of water. I'll also start taking creatine despite the nausea it induces. Should I stop eating fats? Is there anything else?
3)Should I just buy cranberry juice or some other diuretic? I already drink coffee daily.
4) The day before/of what is the best plan?
I have read that I should stop exercising and cycle my pee in the morning. What about diet? There are so many conflicting plans I do not know what is best.
5)
Given the information provided is there any way that I can assure a passed test other than cheating?
6) Any other tips/advice?
If not, what is the best fake urine/equipment that I should buy?
I know these issues have been covered many times (I have been reading for a few hours now), but would really love some clarification on my specific situation?
Any insight to get me on the right track would be incredible. Thank you.
Edit: also, I've started to bulk in the last few months, I've been largely unsuccessful only gaining around 5 pounds (currently at 168), but I'm sure a good amount of this was fat. I'm afraid this could negatively impact my results as well .
Edit:
I've been reading a lot of information on this sub and everyone seems very helpful. I know this shit gets posted all the time, but it means the world if you could chime in on my situation. (xpost /r/askdrugs)
Edit:
Would this be a decent detox method? Is there any benefit of taking creatine/b12 for the week leading up to? Or is it only beneficial for the day of to balence nutrients and color? | 0non-cybersec
| Reddit | 690 | 2,740 |
Pay more on student loans or pay more on condo?. I have about $100k in student loan debt and I have about $78k on my condo. Both are at 6.5% interest.
I bought my condo at the height of the market way back when, and I can't refinance or sell at the moment. (I tried-- but too many owners defaulted so there are a ton on the market for super cheap and the bank won't refinance because the owner to renter ratio is skewed.)
It was my primary residence, but it was only a 600sft 1 bedroom, so when I got married and had kids we had to move. Fortunately, it's a really good rental property due to its location near employers and public transit, and it has been consistently rented for the past 3 years.
I have a little extra money each month I can put toward either of these loans.
Right now I'm thinking to pay the minimum on the student loans and then to put my extra income toward the mortgage because once that is paid off I'll have income coming in that I can then put toward the student loans.
I don't know if I'm thinking about this the right way or not though-- thoughts?
| 0non-cybersec
| Reddit | 263 | 1,084 |
How to use spot instance with amazon elastic beanstalk?. <p>I have one infra that use amazon elastic beanstalk to deploy my application.
I need to scale my app adding some spot instances that EB do not support.</p>
<p>So I create a second autoscaling from a launch configuration with spot instances.
The autoscaling use the same load balancer created by beanstalk.</p>
<p>To up instances with the last version of my app, I copy the user data from the original launch configuration (created with beanstalk) to the launch configuration with spot instances (created by me).</p>
<p>This work fine, but:</p>
<ol>
<li><p>how to update spot instances that have come up from the second autoscaling when the beanstalk update instances managed by him with a new version of the app?</p>
</li>
<li><p>is there another way so easy as, and elegant, to use spot instances and enjoy the benefits of beanstalk?</p>
</li>
</ol>
<p><strong>UPDATE</strong></p>
<p>Elastic Beanstalk add support to spot instance since 2019... see:
<a href="https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html</a></p>
| 0non-cybersec
| Stackexchange | 349 | 1,234 |
The greatest Halloween remake that could have been (an opinion of mine).. Sure, Zombie wanted to do something of his own while trying to balance the elements from the Original. Meanwhile, in the second he went all out with his own story.
So wanting a remake that's not an exact copy, but something new and fresh while remaining close to the vein of the Original, I believe THE STRANGERS could have done the job.
Imagine if there was only ONE killer - MYERS.
and the back-story we'd get is simply the tale of a Child who killed his sister several states away who was locked up in a Sanitarium near the cabin of that couple (Liv Tyler, etc). Naturally, Michael escapes.
No Loomis (this way, there's no need to replace someone irreplaceable).
Anyway, the story would play out EXACTLY like the strangers did, yet with Michael as the killer.
In the end, I think we would have received a gritty, nail-biting, remake that was stripped to the bones, realistic and absolutely worthy of a modern rendition of our beloved classic.
Killer gets out (we wouldn't see this happen. Everyone would assume, based on the backstory)
Killer finds cabin by Sanitarium - and then everything plays out as it did in THE STRANGERS.
At the end of the film, Michael walks away from the cabin.
The audience is left to believe that he's heading HOME.
..To Haddonfield.
BOOM - SETUP FOR SEQUEL.
Thoughts? | 0non-cybersec
| Reddit | 348 | 1,386 |
Diagonal Output of a file. <p>How would you output the diagonal of a file?</p>
<p>e.g I got a file with the following inside.</p>
<pre><code>1,2,3,4,5
6,7,8,9,0
1,2,3,4,5
6,7,8,9,0
1,2,3,4,5
</code></pre>
<p>The output would be supposed to look like: <code>1 7 3 9 5</code> or something like that.</p>
<p>I can output a column via cut (cut -d "," -f5 filename), but I am unsure what to write in order to output the diagonal only.</p>
| 0non-cybersec
| Stackexchange | 178 | 438 |
What did you eat for breakfast?. I just want to see what everyone is eating, get some ideas, start discussion, whatever. I'm not necessarily looking for what's your favorite breakfast (my favorite breakfast certainly isn't something that I have the time or inclination to cook every morning) I'm just looking for a wide range of answers which is why I thought it'd be good to specify what did you eat this morning?
Weekends are the only time I eat breakfast. This morning I had a slice of pumpernickel toast topped with a slice of melted cheese, half an avocado, salt and pepper and a cucumber on the side. Super simple, put together in 5 minutes and most importantly, tasty! ~250 calories.
Edit: Thanks for all the replies! I love seeing what other people are eating, it gives me lots of ideas and things to think about!
| 0non-cybersec
| Reddit | 186 | 828 |
React Routing implementation. <p>I am trying to implement routing in my react app. So I have a component with navigation to another components:</p>
<pre><code> class Order extends Component {
render() {
return (
<div>
<ul>
<li>
<Link to="/stepOne/">1</Link>
</li>
<li>
<Link to="/stepTwo/">2</Link>
</li>
<Link to="/stepThree/">3</Link>
<li>
<Link to="/steFour/">4</Link>
</li>
</ul>
<Switch>
<Route exact path="/stepOne" component={SearchConcoctionFormula} />
<Route exact path="/stepTwo" component={OrderStepTwoIndex} />
<Route exact path="/stepThree" component={OrderStepThreeIndex} />
<Route exact path="/stepFour" component={OrderStepFourIndex} />
</Switch>
</div>);
}
}
export default Order;
</code></pre>
<p>But my problem is that when I click on the link, the selected component is rendered along with the navigation links.
But I expect only the selected component to be rendered. What should I change?</p>
| 0non-cybersec
| Stackexchange | 418 | 1,556 |
Writing an expression for a change in angular velocity of an angle. <p><a href="https://i.stack.imgur.com/zFjdA.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/zFjdA.jpg" alt="enter image description here"></a></p>
<p>Let $AB$ is rotating at $\omega_{AB}=4$ rad/s. Find $\omega_{CD}$ when $\theta=\pi/6$.</p>
<p>So the first thing I did was wrote an express for $CD$ call it $r$. $\phi$ is Angle $CAB$ for reference.</p>
<p>By law of sines I have that $r=\dfrac{0.3\sin \phi}{\sin \theta}$</p>
<p>Since $\Delta ABC $ is a right triangle, $r=0.6\cos \theta$ Taking derivative, and equating to each other I find that $\omega_{CD}$ is $\dfrac{0.3\cos \phi\cdot \omega_{AB}}{r\cos \theta - 0.6(\sin \theta)^2}$</p>
<p>For some reason this isn't the answer. Did I use the wrong relationship?</p>
| 0non-cybersec
| Stackexchange | 296 | 815 |
Learning recursion schemes in Haskell by TicTacToe. <p>Looking around, I noticed that recursion schemes are quite a general concept and I wanted to learn by experiencing it first hand. So I started implementing a minimax algorithm for TicTacToe. Here is a small snippet that sets the stage. Feel free to skip it, since it's just a basic implementation for completeness or read in an <a href="https://ideone.com/4QxrQz" rel="nofollow noreferrer">online IDE</a></p>
<pre class="lang-hs prettyprint-override"><code>{-# LANGUAGE DeriveFunctor #-}
import Data.Maybe
import Data.Sequence hiding (zip, filter, length)
import Data.Foldable
import Data.Monoid
import Control.Arrow
data Player = Cross | Nought deriving (Eq, Show)
type Cell = Maybe Player
data Board = Board { getPlayer :: Player, getCells :: Seq Cell }
type Move = Int
(!?) :: Seq a -> Move -> a
s !? m = index s m
showCell :: Cell -> String
showCell Nothing = " "
showCell (Just Cross) = "x"
showCell (Just Nought) = "o"
instance Show Board where
show (Board p cells) = "+---+---+---+\n"
++ "| " ++ showCell (cells !? 0)
++ " | " ++ showCell (cells !? 1)
++ " | " ++ showCell (cells !? 2) ++ " |\n"
++ "+---+---+---+\n"
++ "| " ++ showCell (cells !? 3)
++ " | " ++ showCell (cells !? 4)
++ " | " ++ showCell (cells !? 5) ++ " |\n"
++ "+---+---+---+\n"
++ "| " ++ showCell (cells !? 6)
++ " | " ++ showCell (cells !? 7)
++ " | " ++ showCell (cells !? 8) ++ " |\n"
++ "+---+---+---+\n"
++ "It's " ++ show p ++ "'s turn\n"
other :: Player -> Player
other Cross = Nought
other Nought = Cross
-- decide on a winner. The first found winner is taken, no matter if more exist
decide :: Board -> Maybe Player
decide (Board p cells) = getAlt $
isWinner 0 1 2 <> isWinner 3 4 5 <> isWinner 6 7 8 <>
isWinner 0 3 6 <> isWinner 1 4 7 <> isWinner 2 5 8 <>
isWinner 0 4 8 <> isWinner 2 4 6 where
sameAs :: Cell -> Cell -> Cell
sameAs (Just Cross) (Just Cross) = Just Cross
sameAs (Just Nought) (Just Nought) = Just Nought
sameAs _ _ = Nothing
isWinner a b c = Alt $ (cells !? a) `sameAs` (cells !? b) `sameAs` (cells !? c)
initialState :: Board
initialState = (Board Cross (fromList $ map (const Nothing) [0..8]))
findMoves :: Board -> [Move]
findMoves (Board p cells) = map fst $ filter (isNothing . snd) $ zip [0..] $ toList cells
applyMove :: Board -> Move -> Board
applyMove (Board player cells) move = Board (other player) (update move (Just player) cells)
data MinimaxRating = Loss | Draw | Win deriving (Eq, Ord, Show)
invertRating Win = Loss
invertRating Draw = Draw
invertRating Loss = Win
</code></pre>
<p>Now, for the fun parts. I've come up with the following type to define my game tree:</p>
<pre class="lang-hs prettyprint-override"><code>-- a game tree is a tree with a current board
-- and a list of next boards tagged with moves
data GameTreeF b m f = Tree b [(m, f)]
deriving (Functor)
type GameTree b m = Fix (GameTreeF b m)
</code></pre>
<p>and, easily enough, we can use an anamorphism to represent expanding a game by all legal moves</p>
<pre class="lang-hs prettyprint-override"><code>fullGameTree :: Board -> GameTree Board Move
fullGameTree = ana phi where
phi board = Tree board $ map (id &&& applyMove board) (findMoves board)
</code></pre>
<p>and the minimax algorithm is represented as a catamorphism which we can write like so</p>
<pre class="lang-hs prettyprint-override"><code>-- given a game tree to explore, finds the best rating and a
-- move sequence that results in it
minimax :: GameTree Board Move -> (MinimaxRating, [Move])
minimax = cata phi where
mergeInMove (m, (r, ms)) = (invertRating r, m:ms)
compareMoves (m, ms) (n, ns) = compare m n <> compare (length ns) (length ms)
phi (Tree board []) = (Draw, []) -- no legal moves is a draw
phi (Tree board moves) = case decide board of
Just winner | winner == getPlayer board -> (Win, []) -- we win
Just winner -> (Loss, []) -- they win
Nothing -> maximumBy compareMoves $ map mergeInMove moves
</code></pre>
<p>For my question: I now want to construct a <code>GameTree</code> that has tagged at each node the minimax result. So what I'm searching for, I believe is this function:</p>
<pre><code>-- tag each node with the result of minimax for its subtree
computeKITree :: GameTree Board Move -> GameTree (Board, MinimaxRating, [Move]) Move
</code></pre>
<p>I just can't figure out how to write this function with recursion schemes. Can someone help me out here?</p>
| 0non-cybersec
| Stackexchange | 1,538 | 5,042 |
How Safe Are Encrypted Websites Really?. <p>I was at a coffee shop and had to (I mean had to) check something on my bank account and another account. I figured since the two websites I was viewing were encrypted, and because my computer (I'm on a Mac) has a firewall, and I don't share through a cloud or such, that my information is safe. Google is encrypted from the moment that you search, and I connected to the actual wifi of the coffee shop (I had to accept their terms in order to do so). </p>
<p>So I was using HTTPS the entire time. I contacted the bank tech support and they confirmed that their whole website is completely encrypted. Same with the other account. Was I safe? There was a person nearby who looked as if he was doing something suspicious on his computer as far as hacking/networking.</p>
| 0non-cybersec
| Stackexchange | 191 | 814 |
Transpose of a linear operator is well-defined. <p>I would like to define the transpose of a linear operator $T$ between finite-dimensional vector spaces $V$ and $W$. Wikipedia gives a straightforward one, but I would like to define it based on what I already know about matrices. Thus, I define the transpose of $T$ to be given by choosing bases $B_1$ and $B_2$ of $W$ and $V$ respectively, and taking the transpose of $T$'s matrix with respect to these bases.</p>
<p>I would like to show that this definition is independent of basis choice, however. In other words, if the matrix chosen above is $A$, then if I changed basis from $B_1$ with change of basis matrix $Q$ and from $B_2$ with matrix $P$, that $QA^TP^{-1} = (PAQ^{-1})^T$. This does not seem to be the case, however. What have I done incorrectly, if anything?</p>
| 0non-cybersec
| Stackexchange | 230 | 828 |
Should I try to start dating if depression makes me boring, but is caused by loneliness?. 23M, always had social anxiety, never dated normally, except one two-week thing a year ago that started because of unknown reason, lasted just enough for me to understand how lonely was I all my entire life and ended horribly. That, and couple of other reasons (like moving out my parents house, living in the middle of nowhere with almost no social interaction) was, probably, a cause of my current depression.
And depression caused some negative effect. Most of the time I feel only apathy, I sleep bad, I have absolutely no energy for anything when I return from my work. I became a lot less interesting - sometimes I read my messages from a year ago - I was a lot more interesting, funnier, wittier, remembered a lot of interesting stuff that I can't remember now, was a lot more passionate about stuff that I liked.
And I'm still extremely lonely.
So, I don't know, should I try something now. On one hand, loneliness is main reason for my depression (extroversion and social anxiety do not mix well, add here lack of any social interaction and a fact that now I understand how much I want affection), so maybe some changes will ease this condition. On another hand, I became boring and apathetic, unemotional - probably I have no chance of making a girl like me now
| 0non-cybersec
| Reddit | 302 | 1,368 |
Can email be hosted on a different server than the website?. <p>While of course the answer in general is a resounding yes, this is my particular issue.</p>
<p>A person has a website "example.com" that is hosted unfortunately at hostgator. There email "@example.com" is hosted on that same server on hostgator which uses cpanel to manage the site and email.</p>
<p>The new website will be hosted on a separate robust and optimized DigitalOcean server. Normally, we would simply point the a record for example.com to point to the new server. The problem I see is that I imagine the email system would go down. Normally, if people use a third party service like Google Apps it's not a problem.</p>
<p>In this scenario however, is there anyway to point the website to the new server, but leave the email system intact on the previous server without having to have the 200+ people have to change any settings on their end? In the host gator DNS "example.com" and "webmail.example.com" and "mail.example.com" all point to the same ip. Theoretically, if I leave webmail and mail alone and just change "example.com" to point to the new server ip, the email should remain working exactly as before but with the website now be served at the new server? Or would the email stop working for reason? Any advice would be most helpful.</p>
| 0non-cybersec
| Stackexchange | 320 | 1,328 |
Recommendation Tuesdays Megathread - Week of July 02, 2019.
Need a recommendation or have one to share? This is your thread! This thread is active all week, so you can post in it when it's not Tuesday and still get an answer! :)
If you have a recommendation to share that's well written and longer than 1.5k characters, consider instead posting a [WT!] (Watch This!) thread.
If you'd like to look through the previous WT! threads to find recommendations or check if there is already one for your favourite show, [click here.](https://docs.google.com/spreadsheets/d/13JtLBsaUlkIYgokKV0CQo0naTL7TuVcTELturmAVRxo/edit#gid=0)
**Not sure how to ask for a recommendation?** Fill this out, or simply use it as a guideline, and other users will find it much easier to recommend you an anime!
*I'm looking for:* A certain genre? Something specific like characters travelling to another world? etc
*Shows I've already seen that are similar:*
*Link to my MAL (or other anime list):* Leave blank if you don't have one. | 0non-cybersec
| Reddit | 277 | 1,013 |
LPT: Storing cables with toilet paper rolls. **WARNING**: Several sound and other technicians in the comments claims that this might damage your cables. Read comments for instructions.
Imgur image: [http://i.imgur.com/kN2ITZq.jpg](http://i.imgur.com/kN2ITZq.jpg)
Found here: [http://www.reddit.com/r/funny/comments/1n4red/ahhh_the_life_of_a_bachelor_been_working_on_this/ccftzq7](http://www.reddit.com/r/funny/comments/1n4red/ahhh_the_life_of_a_bachelor_been_working_on_this/ccftzq7)
| 0non-cybersec
| Reddit | 183 | 486 |
Should MSVC's C4138 warning ("'*/' found outside of comment") be disabled?. <p>When compiling the following code with msvc2017</p>
<pre><code>void Foo::bar(A */*a*/)
</code></pre>
<p>I get this warning:</p>
<pre><code>foo.cpp:38: warning: C4138: '*/' found outside of comment
</code></pre>
<p>I can fix this by adding a space after the asterisk:</p>
<pre><code>void Foo::bar(A * /*a*/)
</code></pre>
<p>however, I would have to do this in a bunch of places, and if I ever uncomment the parameter, the coding style I use won't be followed due to the extra space.</p>
<p>Since I don't get the same warning with gcc or clang, I'm wondering if this is a MSVC-specific quirk that can safely be disabled.</p>
| 0non-cybersec
| Stackexchange | 247 | 732 |
How to use spot instance with amazon elastic beanstalk?. <p>I have one infra that use amazon elastic beanstalk to deploy my application.
I need to scale my app adding some spot instances that EB do not support.</p>
<p>So I create a second autoscaling from a launch configuration with spot instances.
The autoscaling use the same load balancer created by beanstalk.</p>
<p>To up instances with the last version of my app, I copy the user data from the original launch configuration (created with beanstalk) to the launch configuration with spot instances (created by me).</p>
<p>This work fine, but:</p>
<ol>
<li><p>how to update spot instances that have come up from the second autoscaling when the beanstalk update instances managed by him with a new version of the app?</p>
</li>
<li><p>is there another way so easy as, and elegant, to use spot instances and enjoy the benefits of beanstalk?</p>
</li>
</ol>
<p><strong>UPDATE</strong></p>
<p>Elastic Beanstalk add support to spot instance since 2019... see:
<a href="https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html</a></p>
| 0non-cybersec
| Stackexchange | 349 | 1,234 |
Why can't I copy/paste or drag/drop into my virtual machine?. <p>I'm working on a project, and I'm using Ubuntu Studio 14.10 inside Virtual Box (4.3.22; which is the latest version AFAIK).</p>
<p>I'd like to copy some files from my host (Windows 8.1) to the virtual machine, but I can't seem to make it work.<br>
I've tried both "drag 'n' drop" and copy-paste, but neither work.</p>
<p>I have enabled both in the Virtual Box options:</p>
<p><img src="https://i.stack.imgur.com/Hsg8J.png" alt=""></p>
<p><img src="https://i.stack.imgur.com/kBoxr.png" alt=""></p>
<p><strong>Why aren't copy/paste and drag 'n' drop working, even though they're enabled?</strong></p>
| 0non-cybersec
| Stackexchange | 232 | 673 |
How to use spot instance with amazon elastic beanstalk?. <p>I have one infra that use amazon elastic beanstalk to deploy my application.
I need to scale my app adding some spot instances that EB do not support.</p>
<p>So I create a second autoscaling from a launch configuration with spot instances.
The autoscaling use the same load balancer created by beanstalk.</p>
<p>To up instances with the last version of my app, I copy the user data from the original launch configuration (created with beanstalk) to the launch configuration with spot instances (created by me).</p>
<p>This work fine, but:</p>
<ol>
<li><p>how to update spot instances that have come up from the second autoscaling when the beanstalk update instances managed by him with a new version of the app?</p>
</li>
<li><p>is there another way so easy as, and elegant, to use spot instances and enjoy the benefits of beanstalk?</p>
</li>
</ol>
<p><strong>UPDATE</strong></p>
<p>Elastic Beanstalk add support to spot instance since 2019... see:
<a href="https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html</a></p>
| 0non-cybersec
| Stackexchange | 349 | 1,234 |
Git Hook under Windows. <p>I have the following code to checkout in a working directory in the hook post-receive:</p>
<pre><code>#!/bin/sh
git --work-tree=d:/websites/__gitweb --git-dir=d:/_gitrepo.git/ checkout -f
</code></pre>
<p>Unfortunately it doesn't seem to work. However, the command does work when I enter just this in the windows command line (cms):</p>
<pre><code>git --work-tree=d:/websites/__gitweb --git-dir=d:/_gitrepo.git/ checkout -f
</code></pre>
<p>I have checked the permissions and the executing attributes but nothing.</p>
<p><strong>UPDATE:</strong></p>
<p>I think I'm getting closer. Now I know what the problem is but I don't know why is this happening. The hook is actually being triggered but I receive this message:</p>
<pre><code>remote: Starting copy from repository to work tree...
remote: fatal: Not a git repository: 'd:/_gitrepo.git/'
remote: Finished.
</code></pre>
<p>I have tried to change the path of d: to the whole network path but it still doesn't work. If I go to the remote repository and I do a git log, the changes are there and if I run the hook with sh, it works.
Why is it saying that it is not a git repository when clearly it is?</p>
| 0non-cybersec
| Stackexchange | 358 | 1,192 |
Trouble installing ncurses. <p>I've git cloned a program I need: <a href="https://github.com/dbdexter-dev/meteor_demod" rel="nofollow noreferrer">https://github.com/dbdexter-dev/meteor_demod</a></p>
<p>When I try to compile it with <code>make</code>, I get a <code>fatal error: ncurses.h: No such file or catalog</code></p>
<p>So I tried <code>sudo apt install ncurses</code>, but then I get <code>Couldn't find package ncurses</code>.</p>
<p>So i <code>git clone https://github.com/millionbonus/ncurses.git</code>, but when I <code>make</code>, it says <code>no makefile found</code>.</p>
<p>I've run out of ideas. Any help, please? :-)</p>
| 0non-cybersec
| Stackexchange | 237 | 646 |
How can I avoid hardcoding the database connection password?. <p>I am working on a school-project (writing a website) and I ran into the problem of providing the password for the connection to our database. Because of our Open-Source license we have to publish the sourcecode but that would mean that everyone could connect to the database and see tha data.</p>
<p>Currently our connection (a php file) looks like this:</p>
<pre><code>$host="************";
$password="************";
$this->conn = new mysqli($host, $user, $password, $dbname).mysqli_connect_error());
</code></pre>
<p>Now my question is: how can i provide the password to connect to the database without needing to write <code>$password=...</code> ?</p>
| 0non-cybersec
| Stackexchange | 195 | 726 |
How to use spot instance with amazon elastic beanstalk?. <p>I have one infra that use amazon elastic beanstalk to deploy my application.
I need to scale my app adding some spot instances that EB do not support.</p>
<p>So I create a second autoscaling from a launch configuration with spot instances.
The autoscaling use the same load balancer created by beanstalk.</p>
<p>To up instances with the last version of my app, I copy the user data from the original launch configuration (created with beanstalk) to the launch configuration with spot instances (created by me).</p>
<p>This work fine, but:</p>
<ol>
<li><p>how to update spot instances that have come up from the second autoscaling when the beanstalk update instances managed by him with a new version of the app?</p>
</li>
<li><p>is there another way so easy as, and elegant, to use spot instances and enjoy the benefits of beanstalk?</p>
</li>
</ol>
<p><strong>UPDATE</strong></p>
<p>Elastic Beanstalk add support to spot instance since 2019... see:
<a href="https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html</a></p>
| 0non-cybersec
| Stackexchange | 349 | 1,234 |
Stochastic integral with respect to a stochastic integral. <p>[From Bass R.F. Stochastic processes. Exercise 10.4]</p>
<p>Let $N_t = \int_0^tH_sdM_s$ where $M$ is a continuous square integrable martingale and H is predictable and integrable and $L_t = \int_0^tK_sdN_s$ where $K$ is predictable and integrable. Show that</p>
<p>$$
L_t = \int_0^tH_sK_sdM_s
$$</p>
<p>As $N_t = \int_0^tH_SdM_s$, differentiating we get:
$$
dN_t = H_SdM_s
$$
and substituting into $L_t$ we get the required result.</p>
<p>Here I feel as if I am abusing mathematical notation and fear I might go to hell for it - is there another way of about it?
Thanks. </p>
| 0non-cybersec
| Stackexchange | 246 | 645 |
Cannot open files from iCloud drive on Mac but they open on iOS devices. <p>I only use iCloud Drive for files I need to access on my Mac and my iPad. I have a few Keynote presentations that open fine on my iPad and iPhone, but when I try ot open them on my Mac, I get an error saying that the file could not be opened. The error is the same for MindNode files as well. </p>
<p>The error message simply says that it "Cannot open" the file. There is nothing else in the message.</p>
<p>I tried to logout and log back into my iCloud account, but that did not work.</p>
<p>Any suggestions how I can access these files on my Mac again?</p>
| 0non-cybersec
| Stackexchange | 173 | 638 |
Why is my overflow dropdown menu on top of the actionbar?. <p><img src="https://i.stack.imgur.com/eHU3w.png" alt="dropdown list on top of actionbar"></p>
<p>By default isn't it supposed to be under the actionbar? So what am I doing wrong?</p>
<pre><code>@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
</code></pre>
<p>res/menu/main.xml</p>
<pre><code><menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
tools:context="com.example.test.MainActivity" >
<item
android:id="@+id/action_settings"
android:orderInCategory="100"
android:title="@string/action_settings"
app:showAsAction="never"/>
</menu>
</code></pre>
| 0non-cybersec
| Stackexchange | 312 | 918 |
How to use spot instance with amazon elastic beanstalk?. <p>I have one infra that use amazon elastic beanstalk to deploy my application.
I need to scale my app adding some spot instances that EB do not support.</p>
<p>So I create a second autoscaling from a launch configuration with spot instances.
The autoscaling use the same load balancer created by beanstalk.</p>
<p>To up instances with the last version of my app, I copy the user data from the original launch configuration (created with beanstalk) to the launch configuration with spot instances (created by me).</p>
<p>This work fine, but:</p>
<ol>
<li><p>how to update spot instances that have come up from the second autoscaling when the beanstalk update instances managed by him with a new version of the app?</p>
</li>
<li><p>is there another way so easy as, and elegant, to use spot instances and enjoy the benefits of beanstalk?</p>
</li>
</ol>
<p><strong>UPDATE</strong></p>
<p>Elastic Beanstalk add support to spot instance since 2019... see:
<a href="https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html</a></p>
| 0non-cybersec
| Stackexchange | 349 | 1,234 |
Why is traffic matching the public zone instead of the desired zone?. <p>Trying to self-train on <code>firewalld</code> I set up apache and configured the zones as follows:</p>
<pre><code>[root@localhost ~]# firewall-cmd --get-active-zones
work
sources: 192.168.122.1
public
interfaces: ens3
[root@localhost ~]# firewall-cmd --zone=work --list-all
work
interfaces:
sources: 192.168.122.1
services: dhcpv6-client ipp-client ssh
ports:
masquerade: no
forward-ports:
icmp-blocks:
rich rules:
[root@localhost ~]# firewall-cmd --zone=public --list-all
public (default, active)
interfaces: ens3
sources:
services: dhcpv6-client http https ssh
ports:
masquerade: no
forward-ports:
icmp-blocks:
rich rules:
</code></pre>
<p>My expected result is that traffic from the hypervisor would match the "work" zone and since http isn't allowed for that zone for it to be dropped. However I'm still able to get to the web page from there: </p>
<p><img src="https://i.stack.imgur.com/0dBPR.gif" alt="enter image description here"></p>
<p>I know the traffic is matching the "public" zone because removing the "http" and "https" services causes web traffic to stop and adding them back to the public zone restores service while making the same modifications on the "work" zone does nothing.</p>
<p>I'm sure it's a failure of my understanding but I can't spot it.</p>
<h3>Update</h3>
<p>Still having this issue. If I remove the interface from <code>public</code> and add it to <code>work</code> it starts to work but that's likely because all <code>ens3</code> traffic will be going to that zone now. I did a <code>iptable -Z</code> to zero out the packet counts and did verify that the chains associated with the <code>public</code> zone are getting the packets.</p>
<p>Interestingly, if I do the <code>--add-source</code> so that it adds the traffic to the <code>drop</code> or <code>block</code> zones it works how I would expect (traffic is dropped/rejected regardless of what services are configured on the <code>public</code> zone).</p>
<p>Here's the output from netstat on the server running the firewall:</p>
<pre><code>[root@localhost ~]# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
0.0.0.0 192.168.122.1 0.0.0.0 UG 0 0 0 ens3
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 ens3
</code></pre>
| 0non-cybersec
| Stackexchange | 759 | 2,459 |
IS FAT12 somewhat the same thing with reiserfs, xfs?. <p>I just partitioned my hard disk, and made the sdb6, sdb7.</p>
<p>next, I installed file systems, reiserfs, on sdb6
and ,xfs, on sdb7.</p>
<p>after that, I viewed my hard disk information using fdisk -l,
but found that sdb6, sdb7 have FAT12 systems.
is that something wrong? or IS FAT12 somewhat same with reiserfs, xfs ?</p>
<pre><code>Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xe9ffe9ff
Device Boot Start End Blocks Id System
/dev/sda1 * 1 10199 81923436 7 HPFS/NTFS
/dev/sda2 10200 19457 74364885 f W95 Ext'd (LBA)
/dev/sda5 10200 19457 74364853+ 7 HPFS/NTFS
Disk /dev/sdb: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xf16cf16c
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 10199 81923436 7 HPFS/NTFS
/dev/sdb2 10200 19457 74364885 f W95 Ext'd (LBA)
/dev/sdb5 10200 19075 71296438+ 7 HPFS/NTFS
/dev/sdb6 19076 19267 1542208+ 1 FAT12
/dev/sdb7 19268 19457 1526143+ 1 FAT12
</code></pre>
| 0non-cybersec
| Stackexchange | 501 | 1,403 |
Update kernel on ARM device. <p>How can I update the kernel of my ARM device? The device I have been using is <code>A20-Olinuxino</code> <code>LIME</code> board, with<code>Debian GNU/Linux 7.6 (wheezy)</code> image booted from <code>NAND</code>.</p>
<p>The <code>uname -a</code> command displays <code>3.4.102</code>. I updated <code>Wheezy</code> to <code>Jessie</code> but after reboot the <code>uname -a</code> command still displays the old version of kernel (3.4.102). In <code>lib/modules</code> directory there are modules of the new version (3.16.0-4-armp) and in boot directory there are these files:</p>
<pre><code>config-3.16.0-4-armmp script.bin uImage initrd.img-3.16.0-4-armmp System.map-3.16.0-4-armmp vmlinuz-3.16.0-4-armmp
</code></pre>
<p>Why does <code>uname -a</code> not display the new version of Kernel? P.S. <code>cat /etc/debian_version</code> displays the new Debian version 8.4.</p>
| 0non-cybersec
| Stackexchange | 332 | 913 |
How to use spot instance with amazon elastic beanstalk?. <p>I have one infra that use amazon elastic beanstalk to deploy my application.
I need to scale my app adding some spot instances that EB do not support.</p>
<p>So I create a second autoscaling from a launch configuration with spot instances.
The autoscaling use the same load balancer created by beanstalk.</p>
<p>To up instances with the last version of my app, I copy the user data from the original launch configuration (created with beanstalk) to the launch configuration with spot instances (created by me).</p>
<p>This work fine, but:</p>
<ol>
<li><p>how to update spot instances that have come up from the second autoscaling when the beanstalk update instances managed by him with a new version of the app?</p>
</li>
<li><p>is there another way so easy as, and elegant, to use spot instances and enjoy the benefits of beanstalk?</p>
</li>
</ol>
<p><strong>UPDATE</strong></p>
<p>Elastic Beanstalk add support to spot instance since 2019... see:
<a href="https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html</a></p>
| 0non-cybersec
| Stackexchange | 349 | 1,234 |
How to use spot instance with amazon elastic beanstalk?. <p>I have one infra that use amazon elastic beanstalk to deploy my application.
I need to scale my app adding some spot instances that EB do not support.</p>
<p>So I create a second autoscaling from a launch configuration with spot instances.
The autoscaling use the same load balancer created by beanstalk.</p>
<p>To up instances with the last version of my app, I copy the user data from the original launch configuration (created with beanstalk) to the launch configuration with spot instances (created by me).</p>
<p>This work fine, but:</p>
<ol>
<li><p>how to update spot instances that have come up from the second autoscaling when the beanstalk update instances managed by him with a new version of the app?</p>
</li>
<li><p>is there another way so easy as, and elegant, to use spot instances and enjoy the benefits of beanstalk?</p>
</li>
</ol>
<p><strong>UPDATE</strong></p>
<p>Elastic Beanstalk add support to spot instance since 2019... see:
<a href="https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/elasticbeanstalk/latest/relnotes/release-2019-11-25-spot.html</a></p>
| 0non-cybersec
| Stackexchange | 349 | 1,234 |
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