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elmlang | general | yeah, it does feel weird, I was thinking with the `as <var name>` syntax it would work because then you have a single value, but I guess that style syntax isn’t supported | 2019-05-02T14:48:40.479900 | Alicia |
elmlang | general | Even if it did work, that isn't a type annotation? | 2019-05-02T14:50:03.480100 | Jae |
elmlang | general | sorry, I left out a line, I was thinking it would be
```
val: (Int, Int)
(( a, b ) as val) = ( 3, 4 )
``` | 2019-05-02T14:56:08.480300 | Alicia |
elmlang | general | Ah, gotcha | 2019-05-02T14:56:45.480500 | Jae |
elmlang | general | and it would know `a` and `b` were ints since it was destructuring of `val` | 2019-05-02T14:56:47.480700 | Alicia |
elmlang | general | For now, you can have something like:
```
app
|_ elm.json (application with source_directories=["lib/src"]
|_ lib
|_ elm.json (package with exposed_modules set for documented modules and same dependencies as the app)
|_ src
```
You can then run `edp` on `./lib` to get the application documentation. And use `elm mak... | 2019-05-02T15:04:55.480900 | Velia |
elmlang | general | Depends! I mean,there are some nice parts - you get to have docs, doctests, a readme, tests, and a guarantee that this module does not depend on other parts of your application. It you do decide to some day publish it, that becomes excessively easy. The downside is overhead in directory structures, the need to manually... | 2019-05-02T15:04:57.481100 | Huong |
elmlang | general | Yeah, that's never been supported even in 0.18 where you could destructure at the top-level, not only in let-bindings. I haven't found a satisfactory way to deal with this yet :( | 2019-05-02T15:06:56.481300 | Huong |
elmlang | general | There is an article (in Japanese unfortunately, Google translate) that explains that:
<https://qiita.com/arowM/items/98f47202aa92394d483c> | 2019-05-02T15:07:21.481500 | Velia |
elmlang | general | Not sure about ports :thinking_face: never tested, it depends of `elm make` good will. Can unpublished packages have ports? I doubt it (can't check now, on mobile). | 2019-05-02T15:08:44.481800 | Velia |
elmlang | general | I suppose a follow up question is, why does the function name even have to be included in the type annotation? Why not just this
```
let
(Int, Int)
(a, b) = (4, 5)
in
```
or
```
Int -> Int -> Int
myFunction a b = a + b
``` | 2019-05-02T15:14:02.482400 | Jae |
elmlang | general | only guessing but I’d think for ease of parsing, I like how they line up personally | 2019-05-02T15:24:47.484700 | Alicia |
elmlang | general | Myeah, I too like it, tho I guess it's mostly familiarity for me. I think that's also the reason for the syntax: it's how it works in SML and Haskell (albeit with `::` in the latter), and Evan decided he liked it. | 2019-05-02T15:53:38.484900 | Huong |
elmlang | general | Hi!
Anyone here has some experience using Elm with Cordova? | 2019-05-02T16:52:27.485800 | Dayle |
elmlang | general | Do ports mess with the order that data gets sent back to elm? I have a stream of data coming through a websocket and it seems to get to elm out of order | 2019-05-02T17:00:54.486500 | Isaiah |
elmlang | general | Hey <@Sofia>, it's also possible to publish a package that depends on ports by documenting how to set up the required ports and hook them up to the package code - see <https://package.elm-lang.org/packages/xarvh/elm-gamepad/latest/> for a good example | 2019-05-02T17:11:06.488400 | Janiece |
elmlang | general | So you could publish a package and document it as normal, with any port setup stuff described in the README or in whatever module makes the most sense | 2019-05-02T17:12:04.488500 | Janiece |
elmlang | general | That's really interesting! This might be worth pursuing then | 2019-05-02T17:13:51.488700 | Sofia |
elmlang | general | You could also go this route even if you don't actually publish the package...setting up a proper package structure should allow you to use `elm-doc-preview`, and then you can just add the package source directory to your application's source directories | 2019-05-02T17:13:55.488900 | Janiece |
elmlang | general | I don’t have any kind of source for this, but I seem to recall seeing them be stacked (in the datastructure sense) between animation frames | 2019-05-02T18:22:46.489100 | Lorilee |
elmlang | general | Are they coming in exactly backwards per animation frame? That would look somewhat in order and somewhat jumbled I suppose | 2019-05-02T18:23:25.489300 | Lorilee |
elmlang | general | <@Dayle> Yep I'm using it with Cordova right now! Well I switched to Capacitor actually, but same diff | 2019-05-02T19:02:25.490600 | Erin |
elmlang | general | Yeah port order is never guaranteed. Recently had an issue with localstorage giving me old data because of a race condition where I'd set the localstorage from elm and then immediately set it again - apparently the second time was hitting the port first for some reason, meaning the older request was overriding the newe... | 2019-05-02T19:05:32.490700 | Erin |
elmlang | general | Is it possible to run `update` on first launch of an `application`? If not, how am I supposed to parse the initial URL? The docs talk about parsing URL query parameters being used for, e.g., search terms. I get that `onUrlChange` would have fired if someone appended `?search=monkey` to the URL, and then my `update` get... | 2019-05-02T19:40:12.496100 | Erin |
elmlang | general | `init` only lets you affect the model (and by extension, the view), But I guess I could have it spit out a model that's already been run through the update function? Like so:
```
init : flags -> Url.Url -> Nav.Key -> ( Model, Cmd Msg )
init flags url key =
update (UrlChanged url) startingModel
``` | 2019-05-02T19:42:14.496200 | Erin |
elmlang | general | Just pull out the UrlChanged branch into a function and call it from both update & init. | 2019-05-02T19:54:23.496600 | Earnest |
elmlang | general | <@Janiece> do you know why `Time.now` is a task, not a cmd, if it cannot fail? | 2019-05-02T20:10:34.497600 | Isaias |
elmlang | general | <@Huong> then why is random a cmd if it can guarantee a result? | 2019-05-02T20:13:56.497700 | Isaias |
elmlang | general | <@Earlean> cant you sequence cmds if the callback takes a `Maybe Msg`? | 2019-05-02T20:16:05.497900 | Isaias |
elmlang | general | The fact that it cannot fail has nothing to do with that | 2019-05-02T20:23:15.498500 | Kris |
elmlang | general | :thinking_face: i was mislead. What is the reason <@Kris> | 2019-05-02T20:24:42.499100 | Isaias |
elmlang | general | Well, tasks are strictly more powerful than commands | 2019-05-02T20:25:56.499700 | Kris |
elmlang | general | So you should ask why some command is not a task in any case (like Random) | 2019-05-02T20:26:30.000600 | Kris |
elmlang | general | Ive been asking both, yeah | 2019-05-02T20:31:01.000900 | Isaias |
elmlang | general | Why even differentiate the two? | 2019-05-02T20:31:11.001300 | Isaias |
elmlang | general | Yeah I asked the same some months ago | 2019-05-02T20:36:22.001800 | Kris |
elmlang | general | I believe the answer is that tasks are “guaranteed” to produce results, eventually | 2019-05-02T20:36:45.002700 | Kris |
elmlang | general | While commands are not | 2019-05-02T20:36:50.002900 | Kris |
elmlang | general | Oh.. i think i understand now, i just needed to hear it enough times :upside_down_face: | 2019-05-02T20:38:23.003700 | Isaias |
elmlang | general | Or but i still dont know why random isnt a tadk | 2019-05-02T20:39:53.004200 | Isaias |
elmlang | general | Well, a Cmd is opaque. At that point we can’t really do anything with it except hand it to the runtime. Tasks are different, we have andThen and Sequence. So maybe Task is chosen when it’s possible you’d use it with andThen or Sequence. So I’d suggest there is a limitation on random being a Cmd. | 2019-05-02T21:10:52.008600 | Leoma |
elmlang | general | You can sequence Cmds by going through `update`. Eg. A Cmd produces a msg, the runtime calls `update` with that msg and `update` returns the next Cmd to be run | 2019-05-02T22:02:33.009000 | Earlean |
elmlang | general | alright! I’m having trouble getting my elm application to run. I’ve tried the basic example with the counter in the elm guide in it runs fine but when I try to run my SPA it just stops on `Elm.Main.init`. It works fine in the Cordova browser but not on iOS or Android. Maybe you have some hard earned insight into what c... | 2019-05-03T03:02:34.009600 | Dayle |
elmlang | general | I think there's no need for a Random Task, because `Random.Generator` basically does the same job as a `Task` :thinking_face: | 2019-05-03T03:25:36.010700 | Nana |
elmlang | general | Not really, `Random.Generator` can only be sequenced with other generators, so you can't generate a random value and sequence that with sending that random value on a http request | 2019-05-03T03:30:12.012100 | Earlean |
elmlang | general | You can create a Task that does calls to `Random.step`, but you need to manage the seed yourself so the result of the sequence of tasks needs to include the new seed so you can storage it for the next time you want to generate a random value. | 2019-05-03T03:31:46.013700 | Earlean |
elmlang | general | A Task version of `Random.generate` would have the runtime manage the random seed value so you wouldn't have to | 2019-05-03T03:32:38.014600 | Earlean |
elmlang | general | I think this is the main reason that it isn’t built in - this would require kernel code in `elm/random`, which is currently pure Elm (+ an effect manager, which can only do commands, not tasks) | 2019-05-03T03:37:28.014800 | Huong |
elmlang | general | any idea why Elm doesn't see a change event on a dropdown when I use selenium? | 2019-05-03T06:09:54.015700 | Chin |
elmlang | general | What worked for me was to use `selectByVisibleText` | 2019-05-03T06:27:02.015800 | Walton |
elmlang | general | Did you try this one <@Chin>? | 2019-05-03T06:27:27.016000 | Walton |
elmlang | general | What I mean is that the dropdown selection does change. But Elm doesn't receive the event. | 2019-05-03T06:27:52.016300 | Chin |
elmlang | general | Haven't tried that. | 2019-05-03T06:27:57.016500 | Chin |
elmlang | general | I had the same issue…the dropdown changed, but the event in Elm didn’t fire. This method worked correctly. | 2019-05-03T06:29:08.016700 | Walton |
elmlang | general | who has that method? | 2019-05-03T06:29:55.016900 | Chin |
elmlang | general | it looks like it’s WebdriverIO specific | 2019-05-03T06:30:34.017200 | Walton |
elmlang | general | I don’t know if I can help then | 2019-05-03T06:30:51.017400 | Walton |
elmlang | general | but I found it here: <https://seleniumhq.github.io/selenium/docs/api/java/org/openqa/selenium/support/ui/Select.html> | 2019-05-03T06:31:35.017600 | Walton |
elmlang | general | <@Chin> what selenium version are you using? | 2019-05-03T06:34:50.017800 | Walton |
elmlang | general | I'm actually using Capybara | 2019-05-03T06:47:24.018000 | Chin |
elmlang | general | Hello. elm-analyse identifies unused imports. Is there a tool to remove them automatically? | 2019-05-03T09:54:26.019400 | Allyn |
elmlang | general | elm-analyse has a fix mode that can do it (part of the web UI for it), but it can only fix them one at a time. I’m working on adding that to <https://github.com/elm-tooling/elm-language-server> so that you can get quickfix actions in the editor | 2019-05-03T10:02:39.020600 | Alicia |
elmlang | general | I was looking for a CLI based solution. I generate some code using openAPI generator, which write some code with useless imports. So I’d like to clean it automatically every time we generate some code. | 2019-05-03T10:39:29.023400 | Allyn |
elmlang | general | That would be the implementation of this issue: <https://github.com/stil4m/elm-analyse/issues/116> | 2019-05-03T11:25:11.023600 | Millie |
elmlang | general | A workaround for now could be to ignore the directory in `elm-analyse` because it's generated code, which is not maintained by you. | 2019-05-03T11:25:57.023800 | Millie |
elmlang | general | `excludePaths` <https://stil4m.github.io/elm-analyse/#/configuration> | 2019-05-03T11:26:36.024000 | Millie |
elmlang | general | I had not seen it was possible to configure it! | 2019-05-03T11:27:30.024200 | Allyn |
elmlang | general | Thank you very much <@Millie>, it will be very useful | 2019-05-03T11:27:48.024400 | Allyn |
elmlang | general | So, I think Elm’s `view` function needs to have the signature `view : Model -> (Html Msg, Cmd Msg)`
Reason is as follows:
1. if/when you break your app into ’components/pages/whatever you call them` then each component will have a Model. This model represents the history of messages that the component triggered. I... | 2019-05-03T15:43:37.030200 | Leoma |
elmlang | general | I think that might not work with how elm uses requestAnimationFrame right now, if view is only called every 16ms there may be times in that 16ms window when the `view: Model -> (Html Msg, Cmd Msg)` would have produced messages | 2019-05-03T16:08:02.033600 | Alicia |
elmlang | general | it’s not very Elm-y but we’ve been using custom elements where we set properties on the HTML from the Elm side, then then JS side looks at those attributes and makes the magic happen, stuff like `TextInput.view { autofocus = True, placeholder = "Testing" }` which gets rendered out as our custom input field like `node "... | 2019-05-03T16:10:27.036800 | Alicia |
elmlang | general | <@Leoma> how would view know which element to focus without access to the previous model? | 2019-05-03T16:12:17.039400 | Jake |
elmlang | general | and then in the custom element it is like
```
class extends HTMLElement {
connectedCallback() {
requestAnimationFrame(() =>
const elem = this.querySelector["input[autofocus]"];
if (elem) elem.focus();
}
}
}
``` | 2019-05-03T16:12:18.039500 | Alicia |
elmlang | general | What/when are you trying to focus an element? Does `Html.Attributes.autoFocus True` not work for you? | 2019-05-03T16:14:13.042300 | Chae |
elmlang | general | autofocus only works on initial page load | 2019-05-03T16:14:22.042700 | Alicia |
elmlang | general | Autofocus only works on the first render | 2019-05-03T16:14:26.043000 | Leoma |
elmlang | general | I left out some there, we also have a `setTimeout(() => <focus code>, 0)` inside the `requestAnimationFrame` because we’ve seen times when it wasn’t actually rendered when the animation frame fired | 2019-05-03T16:15:06.045600 | Alicia |
elmlang | general | You'd still need a declarative autofocus ("focus this node when it's first rendered"), not an effect ("focus this node after (each) render") | 2019-05-03T16:15:51.048300 | Jake |
elmlang | general | I'm developing with elm-live and at each save of my file, elm-live take about 4 plain seconds to serve the new compiled js (after it has been compiled!). My elm file is quite small : 180-lines... Did you already encounter this issue? | 2019-05-03T16:15:52.048400 | Loralee |
elmlang | general | here is the log of elm-live | 2019-05-03T16:16:31.049800 | Loralee |
elmlang | general | <@Jake> the code runs in the `connectedCallback` in the custom element, as long as it is a leaf node elm will not re-render it | 2019-05-03T16:16:48.050700 | Alicia |
elmlang | general | so it only runs once | 2019-05-03T16:16:52.050900 | Alicia |
elmlang | general | Threading this | 2019-05-03T16:16:56.051100 | Leoma |
elmlang | general | So here’s the problem. I want to add a field and focus it. That field is added by calling to an async DB function in javascript, and when that slot propagates into the Elm model, render it.
This is async, so I can’t , in an update do `({model | fields = newFields}, focus newField)` because the field isn’t ready. | 2019-05-03T16:16:58.051300 | Leoma |
elmlang | general | Could you do something like `Html.Keyed.input (changeKeyHereIfShouldFocus) ...`? That should re-render the input and trigger the autofocus, no? | 2019-05-03T16:17:24.052000 | Chae |
elmlang | general | I’ve started a thread | 2019-05-03T16:17:46.052300 | Leoma |
elmlang | general | Thread here RE `view : Model -> (Html Msg, Cmd Msg)` | 2019-05-03T16:18:09.052500 | Leoma |
elmlang | general | I was writing about the "send Cmd from view" idea, I see your approach as the right one. | 2019-05-03T16:19:00.052800 | Jake |
elmlang | general | How do you know when it’s ready? | 2019-05-03T16:19:29.053000 | Chae |
elmlang | general | Further, the code waiting to focus the element is a component with it’s own `view/update/Model` tuple. Of course, the data to be rendered is passed into `view`. So the component’s update isn’t aware that the field is ready to be focused. | 2019-05-03T16:19:29.053200 | Leoma |
elmlang | general | we could but I don’t like it as much as using custom elements for it | 2019-05-03T16:20:16.053400 | Alicia |
elmlang | general | I would use a custom element, the `connectedCallback` fires when the element is in the DOM and you can focus it | 2019-05-03T16:20:49.053600 | Alicia |
elmlang | general | So, when the component’s view is called, I have:
`view : ExternalData -> InternalModel -> Html Msg`
The external data represents knowledge of the new data slot to render. The internal model has knowledge that we asked for the slot, and would like to focus it.
The place the knowledge naturally comes together is ... | 2019-05-03T16:21:07.053800 | Leoma |
elmlang | general | granted if you don’t already have the polyfills and everything in for them it is a pain | 2019-05-03T16:21:09.054000 | Alicia |
elmlang | general | So my point #4, “It is now actually possible to do the above with a small hack AND it fixes otherwise not easily fixed issues.” hinted at the fact that is is how I fix it. | 2019-05-03T16:21:44.054200 | Leoma |
elmlang | general | And it works exactly as expected. | 2019-05-03T16:21:57.054400 | Leoma |
elmlang | general | Oh, that feels like you have merged view and update | 2019-05-03T16:21:59.054600 | Jake |
elmlang | general | No | 2019-05-03T16:22:19.054900 | Leoma |
elmlang | general | In your view are you “calculating” the readiness of the input by something like `if xValue && yValue then ready else notReady`? | 2019-05-03T16:23:10.055100 | Chae |
elmlang | general | Consider a component’s model/update. A component’s update is called when the component triggers a message. So a component’s model is a history of that component’s events. It is NOT a history of that component’s views. | 2019-05-03T16:23:17.055300 | Leoma |
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