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elmlang | general | The model has a viewport. And this should be set as soon as the section is createtd. | 2019-02-16T05:18:49.515800 | Cathey |
elmlang | general | As the content is variable, I dont know it in advance | 2019-02-16T05:19:28.516000 | Cathey |
elmlang | general | You're trying to have an event produced when the `section` appears in the `view`, but whether the `section` appears in the `view` is dependent on whether the `model` contains a certain value. So you should be asking, when does the model contain such a value? | 2019-02-16T05:19:47.516200 | Earlean |
elmlang | general | It's common in ReactJS to do things like `componentDidMount` etc. this isn't how it's done in Elm. Because `view` elements in Elm can't hold state. | 2019-02-16T05:21:05.516400 | Earlean |
elmlang | general | the state is in the model | 2019-02-16T05:21:20.516600 | Earlean |
elmlang | general | Right! Then I need a state in the model, which controls the visibility of the view… thats the way round…. | 2019-02-16T05:22:33.516900 | Cathey |
elmlang | general | But however, at some point it has to be triggered by a message… which an elm app can never send itself but only by a Browser.Event or Dom function, HTML request or any other elm function that interacts with the outer world… conclussionn: what I want is not possible in elm, except with binding it to a port and subscribe to that… | 2019-02-16T05:31:56.517200 | Cathey |
elmlang | general | if you had a port, when would you send to it? | 2019-02-16T05:55:05.517400 | Earlean |
elmlang | general | I think you're missing the key point, either you `model` contains a value that would result in that `section` being in the `view` at `init` or some event happens that changes the `model` so that the `section` is in your `view` | 2019-02-16T05:56:22.517600 | Earlean |
elmlang | general | if the value is there at `init` then `section` will be in the `view` at `init` so you can do this at `init` | 2019-02-16T05:57:09.517800 | Earlean |
elmlang | general | yes. totally agree. But I did end up myself in a dead-end. I totally messed up my architecture. it works, but does not follow this pattern strictly… :disappointed: | 2019-02-16T06:01:25.518000 | Cathey |
elmlang | general | Hi folks, I was under the assumption that `Html.lazy` would only be called if the passed value changed, but from this scsee <https://ellie-app.com/4KMM8RhbVpva1> it appears that lazy have no effect (it's called on each frame, not every second as it should). | 2019-02-16T06:09:50.520200 | Jonna |
elmlang | general | <@Jonna> the function that you passed to `Html.lazy` is a different function each time | 2019-02-16T06:11:45.520800 | Earlean |
elmlang | general | the trick to `Html.Lazy.lazy` is that it does 'reference comparison' rather than the usual 'value comparison' in the rest of Elm. This is an optimisation, doing a full value comparison would be very costly and would make the optimisation worthless. | 2019-02-16T06:13:25.522500 | Earlean |
elmlang | general | ok | 2019-02-16T06:17:46.523000 | Jonna |
elmlang | general | <@Jonna> <https://ellie-app.com/4KMW5QMCfxna1> is `Html.Lazy.lazy` functioning as expected | 2019-02-16T06:17:54.523400 | Earlean |
elmlang | general | I didn't knew the function reference counted as well | 2019-02-16T06:17:58.523600 | Jonna |
elmlang | general | it must, otherwise providing a different function wouldn't result in a change | 2019-02-16T06:19:14.524600 | Earlean |
elmlang | general | which would be very unexpected | 2019-02-16T06:19:26.524900 | Earlean |
elmlang | general | he idea was to throttle as an answer to : <https://discourse.elm-lang.org/t/many-messages-causes-slow-rendering/3150> | 2019-02-16T06:19:34.525200 | Jonna |
elmlang | general | but it's not working as I thought it would (and am pretty sure it was a few years ago) | 2019-02-16T06:20:12.525800 | Jonna |
elmlang | general | `Html.Lazy.lazy` has always been reference comparison | 2019-02-16T06:20:46.526200 | Earlean |
elmlang | general | yes, for the value, but for the function I am fairly sure that in 0.15-ish it wasn't checking | 2019-02-16T06:21:51.526900 | Jonna |
elmlang | general | anyways | 2019-02-16T06:22:10.527100 | Jonna |
elmlang | general | thanks for the clarification :slightly_smiling_face: | 2019-02-16T06:22:27.527500 | Jonna |
elmlang | general | The thing about `Html.Lazy.lazy` is that it's a transparent optimisation, it works the same whether or not the optimisation is happening or not. | 2019-02-16T06:23:14.528400 | Earlean |
elmlang | general | if it didn't compare against the function then it would produce a different result than if it was just `identity` which would be very broken | 2019-02-16T06:25:31.529800 | Earlean |
elmlang | general | Hello. I’m discovering the rtfeldman/elm-css package. I can’t figure how to use the transparent color value. This code does not compile because transparent has not the same type as hex “EEE”:
```
let
rowColor =
if item.even then
hex "EEE"
else
transparent
in
div
[ css [
backgroundColor rowColor
]
]
<| ...
``` | 2019-02-16T06:31:09.532600 | Allyn |
elmlang | general | An example in ellie: <https://ellie-app.com/4KNfXGNtWnVa1> | 2019-02-16T06:41:35.533800 | Allyn |
elmlang | general | But thanks for your support :slightly_smiling_face: | 2019-02-16T06:42:35.533900 | Cathey |
elmlang | general | I think you need `ColorValue (hex "EEE")` | 2019-02-16T06:47:07.535100 | Agustin |
elmlang | general | Or make one somehow | 2019-02-16T06:47:51.535800 | Agustin |
elmlang | general | <@Allyn> Try this instead:
```
rowBgColor =
if item.even then
backgroundColor (hex "EEE")
else
backgroundColor transparent
...
div [css [rowBgColor]] [...]
``` | 2019-02-16T06:48:31.536500 | Lynne |
elmlang | general | are fragments of views not functions?
<https://gist.github.com/afidegnum/d855c6201c855b1798e2a1826695df43#file-main-elm-L660>
gives me errors of
``` The `newPageForm` value is not a function, but it was given 1 argument.
660| , (newPageForm page)
^^^^^^^^^^^
Are there any missing commas? Or missing parentheses?
``` | 2019-02-16T06:52:41.537900 | Leopoldo |
elmlang | general | <@Lynne> it works, but I don’t understand why | 2019-02-16T06:53:01.538300 | Allyn |
elmlang | general | Becuase `backgroundColor` accepts `ColorValue compatible` | 2019-02-16T06:53:21.538900 | Agustin |
elmlang | general | As you mentioned `hex "EEE"` and `transparent` have different types | 2019-02-16T06:53:26.539200 | Lynne |
elmlang | general | and returns the same thing, regardless of which colorvalue | 2019-02-16T06:53:27.539300 | Agustin |
elmlang | general | OK, I get it! Thank you for your help | 2019-02-16T06:53:54.540300 | Allyn |
elmlang | general | `backgroundColor` accepts any of these and is of type `Style` regardless of colour | 2019-02-16T06:53:55.540400 | Lynne |
elmlang | general | <@Leopoldo> <https://gist.github.com/afidegnum/d855c6201c855b1798e2a1826695df43#file-main-elm-L540-L541> it's not a function | 2019-02-16T06:55:39.540700 | Earlean |
elmlang | general | you can tell by the type signature, if it was a function then it's type would contain `->` | 2019-02-16T06:56:20.541200 | Earlean |
elmlang | general | eg. `String -> Html msg` is a function, `Html msg` isn't a function | 2019-02-16T06:56:49.541700 | Earlean |
elmlang | general | oh ok, :slightly_smiling_face: | 2019-02-16T06:58:24.541900 | Leopoldo |
elmlang | general | still learning :slightly_smiling_face: | 2019-02-16T06:58:30.542100 | Leopoldo |
elmlang | general | what's wrong with this code ? ``` onePage : Page -> Html msg
onePage page =
li [] [ text page.title
, a [ href page.id ] [ text page.title ]
, a [ href page.id ] [ text "Edit" ]
, a [ href page.id ] [ text "Delete" ]
]``` | 2019-02-16T07:18:28.542400 | Leopoldo |
elmlang | general | `The function expects 2 arguments, but it got 3 instead.` | 2019-02-16T07:19:28.542600 | Leopoldo |
elmlang | general | <@Leopoldo> which function is that message about? | 2019-02-16T07:23:10.543300 | Earlean |
elmlang | general | <https://gist.github.com/afidegnum/a9bb35747aab5f598ef12cd277cce84f#file-main-elm-L441> | 2019-02-16T07:24:02.543500 | Leopoldo |
elmlang | general | it's ok, i have got it, | 2019-02-16T07:24:34.543700 | Leopoldo |
elmlang | general | some intruding tag :smile: | 2019-02-16T07:24:43.543900 | Leopoldo |
elmlang | general | appending lists via `,` or `++` doesn't seems to work at <https://gist.github.com/afidegnum/01faa688eb35104d2a0aa19b820132cc#file-main-elm-L436-L440>
`The (++) operator cannot append these two values:`
or
```
The 2nd element of this list does not match all the previous elements:
438| ul [] [(List.map onePage pages)
439|> , a [ href "/posts/new" ] [ text "Create new post" ]
440| ]
This `a` call produces:
Html.Html msg
But all the previous elements in the list are:
List (Html.Html msg)
``` | 2019-02-16T07:32:31.545200 | Leopoldo |
elmlang | general | any insight ? | 2019-02-16T08:30:01.545500 | Leopoldo |
elmlang | general | `ul` takes two lists | 2019-02-16T08:54:51.545900 | Agustin |
elmlang | general | The second list must contain `Html.Html msg` | 2019-02-16T08:55:11.546500 | Agustin |
elmlang | general | You’re trying to have a sub list | 2019-02-16T08:55:17.546900 | Agustin |
elmlang | general | You can’t do that | 2019-02-16T08:55:20.547100 | Agustin |
elmlang | general | You need to do `(List.map onePage pages) ++ [a [] []]` | 2019-02-16T08:55:35.547500 | Agustin |
elmlang | general | And you will probably need `()` around it to keep the compiler happy | 2019-02-16T08:55:49.547900 | Agustin |
elmlang | general | i did that but the compiler won't budge :slightly_smiling_face: | 2019-02-16T08:58:15.548200 | Leopoldo |
elmlang | general | You need to split yours lists like I said | 2019-02-16T08:58:30.548500 | Agustin |
elmlang | general | if you remove `(List.map onePage pages),` from your first snippet it will compile | 2019-02-16T08:58:48.549000 | Agustin |
elmlang | general | `ul [] ((List.map onePage pages) ++ [a [href "/posts/new" ] [text "Create new post"]])` | 2019-02-16T08:59:23.549500 | Agustin |
elmlang | general | Note the lack of outer `[` brackets on the map | 2019-02-16T08:59:33.549800 | Agustin |
elmlang | general | ``` The 2nd element of this list does not match all the previous elements:
438| ul [] [(List.map onePage pages)
439|> , a [ href "/posts/new" ] [ text "Create new post" ]
440| ]
This `a` call produces:
Html.Html msg
But all the previous elements in the list are:
List (Html.Html msg)
``` | 2019-02-16T08:59:49.550200 | Leopoldo |
elmlang | general | `ul [] ((List.map onePage pages) ++ [a [href "/posts/new" ] [text "Create new post"]])` | 2019-02-16T09:00:21.550700 | Agustin |
elmlang | general | that's the new modification <https://gist.github.com/afidegnum/04b9d7eae8f68c6016a1347a00d4ddd5#file-main-elm-L436> | 2019-02-16T09:00:26.551000 | Leopoldo |
elmlang | general | No you can’t do that | 2019-02-16T09:00:44.551500 | Agustin |
elmlang | general | ?? | 2019-02-16T09:00:49.551700 | Leopoldo |
elmlang | general | `,` works only in `[]` | 2019-02-16T09:00:50.551800 | Agustin |
elmlang | general | And `[List.map a b]` produces `[[]]` | 2019-02-16T09:01:11.552200 | Agustin |
elmlang | general | Which is what you need to be trying to avoid | 2019-02-16T09:01:16.552400 | Agustin |
elmlang | general | :slightly_smiling_face: | 2019-02-16T09:01:23.552600 | Leopoldo |
elmlang | general | but by the way, here the link is at the buttom of the list, instead of top, that's why i wanted to move a href to the top before `ul` | 2019-02-16T09:03:01.553800 | Leopoldo |
elmlang | general | <https://ellie-app.com/4KQFCc87zBSa1> | 2019-02-16T09:17:23.554000 | Agustin |
elmlang | general | This is your code compiling | 2019-02-16T09:17:26.554200 | Agustin |
elmlang | general | It doesn’t run because ellie seems to be missing Elm, no idea why. | 2019-02-16T09:17:44.554600 | Agustin |
elmlang | general | This is it running but it won’t run in ellie <https://ellie-app.com/4KQL2CmQCqxa1> | 2019-02-16T09:23:19.556600 | Agustin |
elmlang | general | Anyone else using the elm/file package. I am trying to use File.Select.files but the file browser that comes up is a single file select browser. I checked the kernel js code and it seems legit as it sets the multiple attribute to an empty string. BTW I couldn't find the installed elm packages src in my project directory (not in elm-stuff or couldn't find with a linux find command. If there is a way to access it, please let me know. | 2019-02-16T09:25:53.558400 | Raye |
elmlang | general | Look in `~/.elm/0.19.0/package/elm/file/` | 2019-02-16T09:27:45.558900 | Agustin |
elmlang | general | Are you sure its a single file browser? What happens if you hit shift while clicking | 2019-02-16T09:28:13.559400 | Agustin |
elmlang | general | yeah i'm sure. I tried it on my mac and android phone. | 2019-02-16T09:35:04.561500 | Raye |
elmlang | general | <@Leonor> it needs to sent `Http.requests` which is not i believe that could be the error, there are additional compilation errors i m trying to fix as well | 2019-02-16T09:35:26.562000 | Leopoldo |
elmlang | general | <@Leopoldo> yes I changed a fair amount to make it compile | 2019-02-16T09:35:46.562400 | Agustin |
elmlang | general | what other errors did you encountered ? | 2019-02-16T09:36:51.562700 | Leopoldo |
elmlang | general | Not properly namespaced Decoders, Frame has the wrong type sig, etc | 2019-02-16T09:37:34.563200 | Agustin |
elmlang | general | Just grab the ellie src and diff it | 2019-02-16T09:37:39.563400 | Agustin |
elmlang | general | ah, ok, then let me use yours :slightly_smiling_face: thanks a lot, | 2019-02-16T09:38:26.563800 | Leopoldo |
elmlang | general | well, this is my named "ELM Rest Sheet" | 2019-02-16T09:38:53.564300 | Leopoldo |
elmlang | general | which can be used for any Rest based operations :slightly_smiling_face: | 2019-02-16T09:39:04.564600 | Leopoldo |
elmlang | general | i m preparing a blog about it as well | 2019-02-16T09:39:16.564900 | Leopoldo |
elmlang | general | <@Leonor> Gracias, it successfully compiled thanks a lot | 2019-02-16T09:41:03.565400 | Leopoldo |
elmlang | general | It's just 'Elm', like the name of the type of tree. It's not an acronym so no need to put it in all uppercase. | 2019-02-16T09:42:47.565600 | Earlean |
elmlang | general | what do you think needs improving ? | 2019-02-16T09:42:59.565900 | Leopoldo |
elmlang | general | ok, thanks for the correction, I have a bad habit of uppercasing sentences :smile: | 2019-02-16T09:44:01.566000 | Leopoldo |
elmlang | general | why is `elm-live` giving me file not found error ? | 2019-02-16T10:10:31.566500 | Leopoldo |
elmlang | general | Can you share a little more context? | 2019-02-16T10:10:51.566800 | Regenia |
elmlang | general | `$ elm-live src/Main.elm --open`
`Success! Compiled 1 module.`
from localhost:8000
I have a ```file not found``` error | 2019-02-16T10:12:28.567000 | Leopoldo |
elmlang | general | Hmmm and an index.html was output? | 2019-02-16T10:13:36.567700 | Regenia |
elmlang | general | no i didn't add the `index.html` | 2019-02-16T10:14:19.567900 | Leopoldo |
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