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elmlang | general | I see | 2019-03-02T06:36:48.243500 | Lynne |
elmlang | general | Well, `view` is supposed to render your model so there is basically no option to moving knowledge about specific views to it and doing URL parsing in `update` instead | 2019-03-02T06:38:43.243700 | Lynne |
elmlang | general | I mean, if you want to request data only when it is actually needed | 2019-03-02T06:39:13.243900 | Lynne |
elmlang | general | Why do you think it is bad if I may ask? | 2019-03-02T06:39:29.244100 | Lynne |
elmlang | general | Because it means that if I change my view such that asciidoc HTML is displayed in other places, I need to update the `update` function as well. | 2019-03-02T06:40:11.244300 | Winnie |
elmlang | general | Basically, `update` needs to know specifically under which conditions the generation needs to happen. | 2019-03-02T06:40:53.244500 | Winnie |
elmlang | general | And these conditions do not exist in URL, is it correct? | 2019-03-02T06:41:13.244700 | Lynne |
elmlang | general | I can examine the URL to determine if it will need the generation, but only because | 2019-03-02T06:41:51.244900 | Winnie |
elmlang | general | but only by encoding that knowledge in `update`. | 2019-03-02T06:42:06.245100 | Winnie |
elmlang | general | It's essentially view-specific details leaking to other parts of the program. | 2019-03-02T06:42:25.245300 | Winnie |
elmlang | general | I understand your concern but in Elm core of program is model, not view. So what you have said about `update` is how it should be done when we are talking about the Elm architecture | 2019-03-02T06:43:34.245500 | Lynne |
elmlang | general | In other words view is a product of model, not vice versa | 2019-03-02T06:44:26.245700 | Lynne |
elmlang | general | well...only because they've taken away native modules. That's how I used to do it. | 2019-03-02T06:44:31.245900 | Winnie |
elmlang | general | Your point is true, though, so I guess my hands are tied. | 2019-03-02T06:44:56.246100 | Winnie |
elmlang | general | You may consider custom components instead if it is that critical | 2019-03-02T06:45:04.246300 | Lynne |
elmlang | general | I wouldn't say critical. It's just frustrating that something so conceptually straightforward requires such gymnastics. | 2019-03-02T06:45:46.246500 | Winnie |
elmlang | general | Anyhow, thanks for you help on this. | 2019-03-02T06:46:01.246700 | Winnie |
elmlang | general | You are welcome :slightly_smiling_face: | 2019-03-02T06:46:15.246900 | Lynne |
elmlang | general | I'll look into custom components, but I imagine I'll just go the standard route. | 2019-03-02T06:46:26.247100 | Winnie |
elmlang | general | Apart from possible inconveniences the standard way also gives some nice opportunities like displaying the "Loading..." screen while your picture is being rendered | 2019-03-02T06:47:17.247300 | Lynne |
elmlang | general | Right. I wouldn't have a problem with standard approach if the view could somehow trigger the port itself. That would plug the leak. | 2019-03-02T06:52:53.247500 | Winnie |
elmlang | general | You could always generate `Html` in `update`, store it in your `Model` and just return it in `view`. I am not sure if that is a good idea though :sweat_smile: . | 2019-03-02T09:22:35.247900 | Tamra |
elmlang | general | It has a disadvantage of potentially doing unnecessary job as several `update` calls may happen before `view` which only happens on each animation frame | 2019-03-02T09:24:22.248100 | Lynne |
elmlang | general | Therefore, if your model is updated often, generating Html and storing it in the model will be a waste | 2019-03-02T09:24:46.248300 | Lynne |
elmlang | general | what do people think is the easiest replacement for the 0.18 websockets library for a migration to 0.19? I looked at PortFunnel and it seemed to be more sophisticated (and hence more complex) to implement | 2019-03-02T10:27:44.249900 | Lynn |
elmlang | general | I’d prefer to have the same basic api, so I can focus (at least initially) on wiring up the ports that will be needed | 2019-03-02T10:28:59.250700 | Lynn |
elmlang | general | <wishful-thinking>I guess the ideal would be that someone was allowed to port the existing (native) code to 0.19 and put it on elm-explorations so that we could all use while the new version is worked on</wishful-thinking> | 2019-03-02T11:43:42.256300 | Lynn |
elmlang | general | Hey! Our workshop at the University of Utrecht (the Netherlands) starts on Monday and a lot of people signed up today. If any of you fine folks will be around please give us a hand as a coach. Even a single evening will be appreciated. The schedule is here: <http://software.garden/test-run.html> | 2019-03-02T12:02:25.257200 | Dorsey |
elmlang | general | It’s all on GitHub... | 2019-03-02T12:10:53.257600 | Dede |
elmlang | general | Hello. I wrote a parser to parse something like ” = some random text” and I need to get “some random text” from it, whatever are the characters after the “=” symbol.
```
stringParser : Parser String
stringParser =
getChompedString <| chompWhile (\c -> True)
stringEqualityParser : Parser String
stringEqualityParser =
succeed identity
|. spaces
|. symbol "="
|. spaces
|= stringParser
```
This does the job, but is there a more elegant solution? | 2019-03-02T12:16:21.257900 | Allyn |
elmlang | general | what is inelegant to you here? it is quite understandable I think. | 2019-03-02T12:24:01.258900 | Virgie |
elmlang | general | How do you intend to use this, the `stringParser` will just keep on chomping till the end of the input, so you can't really use this at the moment in a larger parser | 2019-03-02T12:25:00.259800 | Virgie |
elmlang | general | I don’t need to use it in a larger parser | 2019-03-02T13:33:06.260400 | Allyn |
elmlang | general | I was wondering if there wasn’t any shorter solution which did not imply to create the `stringParser` function | 2019-03-02T13:37:14.261500 | Allyn |
elmlang | general | you can always inline that function, but this is good code | 2019-03-02T13:38:45.262000 | Virgie |
elmlang | general | that was definitely not what I was thinking of :wink: | 2019-03-02T13:39:49.262900 | Allyn |
elmlang | general | Could you do something like `keep zeroOrMore ` | 2019-03-02T13:39:55.263200 | Hoyt |
elmlang | general | <@Hoyt> that is not part of the API any more since 0.19 | 2019-03-02T13:40:22.263800 | Virgie |
elmlang | general | ah, okay, I”m looking at old docs. Haven’t looked at changes to the parser for 0.19 | 2019-03-02T13:40:41.264500 | Hoyt |
elmlang | general | one improvement is - if you can find a character that will never occur in your code like NUL, to use `chompUntilEndOr "\0"` | 2019-03-02T13:41:13.265000 | Virgie |
elmlang | general | this will drop down into JS and be a little more efficient I think | 2019-03-02T13:41:25.265400 | Virgie |
elmlang | general | ah, I see. Looking at the updated ones | 2019-03-02T13:41:34.265700 | Hoyt |
elmlang | general | It does not accept “\0” as a parameter, but “\t” works | 2019-03-02T13:45:46.266200 | Allyn |
elmlang | general | elm format rewrites `\0` to `"\u{0000}"` which I think it should accept. anyway `\t` also does the job | 2019-03-02T14:02:22.267000 | Virgie |
elmlang | general | It works indeed, but I prefer “\t” for readability | 2019-03-02T14:03:22.267500 | Allyn |
elmlang | general | Google could not find anything obvious, hence why I asked
| 2019-03-02T16:51:28.267700 | Lynn |
elmlang | general | None | 2019-03-02T16:53:57.267900 | Lynn |
elmlang | general | how can i call play method on video/audio element with elm?
is it possible? | 2019-03-02T17:39:48.269600 | Cleveland |
elmlang | general | `elm-use` doesn't seem to support 0.19 yet. Does anyone know why? Haven't gotten around to it yet? Is it in the works? | 2019-03-02T17:42:07.270300 | Verlene |
elmlang | general | I didn't even know that existed :smile: I tend to use `npm i` and `npx` to run project-local stuff, though there are a few tools for elm version management around, including `elmv` and various `asdf` plugins, amongst others (presumably) | 2019-03-02T17:45:08.271800 | Huong |
elmlang | general | Yeah, I just stumbled upon it now, and figured it seemed sensible to be able to easily switch between versions. I'd prefer to stay out of npm-land if I can. :stuck_out_tongue: | 2019-03-02T17:46:44.272600 | Verlene |
elmlang | general | I meant you can hack up your own version of Elm if not having something native is a showstopper: <https://github.com/elm/> | 2019-03-02T17:52:08.272700 | Dede |
elmlang | general | <@Cleveland> you can make a port that tells JS to document.querySelector(#id).play() at the very least. prob need to wrap in rAF | 2019-03-02T18:45:39.274200 | Jarvis |
elmlang | general | i have a thumbnail gallery that opens a <video> in a modal when user clicks respective thumbnail. but i want videos to initialize at volume=0. for now i use a mutation observer on document.body that sets node.volume=0 on new <video> nodes. | 2019-03-02T18:48:32.276600 | Jarvis |
elmlang | general | so, the sky's the limit :smile: | 2019-03-02T18:51:01.276900 | Jarvis |
elmlang | general | Dan Abrams just made a talk about this: <https://www.youtube.com/watch?v=8jW58fXuuOk> | 2019-03-02T19:30:00.279700 | Allyn |
elmlang | general | He created a wrapper around HTML5 apis: <https://github.com/danabrams/elm-media> | 2019-03-02T19:36:53.279900 | Allyn |
elmlang | general | I'm thinking about a data structure for a question with single choice answer, like:
```
What is the value of 2 + 2?
( ) 3
(*) 4
( ) 5
```
I'd like to make invalid states impossible, so the requirements are following:
1. There must always be exactly one correct answer
That could be satisfied with a `NonEmptyList` where the first element is the correct answer.
2. Answers must be unique
A Set would work, assuming there will be no additional data in the answer (like an id).
For the UX:
3. It must be possible to re-order the options
It's not much fun if the first option is always correct.
Best candidate I can think of so far is the `AssocList` (<https://package.elm-lang.org/packages/pzp1997/assoc-list/latest/>) with keys being the options and values indexes for ordering, so `AssocList.Dict Option Int`. Then to check if a given answer is correct I would test if it's the head of the `AssocList.keys`, and to render I would do `AssocList.toList >> sortBy Tuple.second`. The only downside I see is that the AssocList can be empty, which would violate requirement 1. I think I could live with that, but maybe I should make a `NonEmptyAssocList`. Is there anything else I should consider? | 2019-03-03T01:45:32.280500 | Dorsey |
elmlang | general | Thinking about your problem, what comes to mind is that you always need a good answer and a few bad ones. So maybe you could use something like `Question String (List String)`, and then it's only a matter of displaying a random number of bad answers, then the correct answer, then the remaining bad answers? | 2019-03-03T02:06:30.284000 | Krista |
elmlang | general | I mean, not conflate the data and its representation | 2019-03-03T02:07:06.284800 | Krista |
elmlang | general | That would work, but I'd like the order to be explicit (i.e. not random). Also the uniqueness is not guaranteed - I'd have to check for that at runtime. | 2019-03-03T02:35:19.286700 | Dorsey |
elmlang | general | There’s a much better wrapper coming this month. | 2019-03-03T02:42:53.287200 | Cammy |
elmlang | general | Right now this is the way to do it but I’ll be releasing a wrapper very soon that avoids reaching into virtual dom like this. | 2019-03-03T02:45:24.288900 | Cammy |
elmlang | general | Why not just use a volume or muted attribute on the video dom nodes, instead of a mutation observer? | 2019-03-03T02:45:53.289400 | Cammy |
elmlang | general | Maybe `Question String Int (List String)` with the Int being the index of the correct answer? | 2019-03-03T03:02:26.291400 | Krista |
elmlang | general | not sure what you meant about uniqueness | 2019-03-03T03:02:39.291700 | Krista |
elmlang | general | Yeah, that's interesting. Uniqueness of the answers, so that it's not possible to do ```
How much is 2 + 2
- ( ) 4
- (*) 4
- ( ) 5
``` | 2019-03-03T03:19:31.293200 | Dorsey |
elmlang | general | I guess I could use `AssocSet` (it's ordered and guarantees that values are unique). | 2019-03-03T03:22:20.295300 | Dorsey |
elmlang | general | But there can still be collision between correct and one of the incorrect answers. | 2019-03-03T03:23:04.295700 | Dorsey |
elmlang | general | :thinking_face: | 2019-03-03T03:23:10.295900 | Dorsey |
elmlang | general | Ah, that is yet another concern that should maybe not be conflated with the data and its representation. Maybe the wrong answers can be manually provided, if not then you will need some kind of generation, some kind of fuzzing... | 2019-03-03T03:31:29.298700 | Krista |
elmlang | general | Created a PR to add Elm to <https://zeit.co/new>
I used create-elm-app for that: <https://github.com/zeit/now-examples/pull/291> | 2019-03-03T05:41:53.299600 | Shena |
elmlang | general | Was unsure whether it belongs to "Programming Languages" or "Frameworks and Libraries" | 2019-03-03T05:42:39.299700 | Shena |
elmlang | general | Actually I should probably add a few words about deploying to now in the readme.md | 2019-03-03T05:44:22.299900 | Shena |
elmlang | general | Are the number of answers fixed? Like to 3 or something? | 2019-03-03T06:10:15.302400 | Ashton |
elmlang | general | ```
type alias Answer =
{ value : String
, order : Int
}
type alias Question =
{ value : String
, rightAnswer : Answer
, wrongAnswers : List Answer
}
answers : Question -> List Answer
answers { rightAnswer, wrongAnswers } =
List.sortBy .order (rightAnswer :: wrongAnswers)
``` | 2019-03-03T06:14:43.306500 | Ashton |
elmlang | general | <@Dorsey> I'd just do `type Question = Question { question : String, correctIndex : Int, answers : (List String) }` in a `Question` module and expose the `Question` type(not the constructor) as well as a `makeQuestion : String -> Int -> List String -> Maybe Question` function that makes sure the `Int` is a valid index of the `List String` and that the list contains no duplicates(or something similar, like filter out dupes and check the length). | 2019-03-03T06:14:54.306700 | Earnest |
elmlang | general | If you add & expose other functions like `shuffleAnswers : Question -> Question`, just make sure they maintain the invariants you've set in the `makeQuestion` function. | 2019-03-03T06:19:50.307700 | Earnest |
elmlang | general | <@Dorsey> you could write a version of Selectlist can is for a Set.
<https://package.elm-lang.org/packages/rtfeldman/selectlist/latest/SelectList>
The Set will guarantee rhe uniqueness and the data structure will guarantee at least one selected item (the correct answer).
Then you can have a type like `type Question = Question String (SelectSet Answer)` | 2019-03-03T07:28:46.311900 | Edie |
elmlang | general | `Answer` could be simplified as a String to not over complicate the data structure. | 2019-03-03T07:33:14.313000 | Edie |
elmlang | general | I'd like to insert a little elm component into an existing js/typescript/java legacy app that is build using maven and npm/grunt plugins. Grunt seems deprecated and so I don't expect the grunt-elm plugin to be maintained any further. Can anyone suggest an approach to integrating the elm build into this maven-driven (with npm and grunt plugins) project? Thanks in advance. | 2019-03-03T07:56:53.318700 | Susanna |
elmlang | general | I am pretty sure grunt is capable of running shell commands, so you can just call `elm make` from your grunt pipeline | 2019-03-03T08:10:07.319500 | Lynne |
elmlang | general | If you want to run it by Maven instead, there is a plugin to execute shell commands for it: <https://search.maven.org/artifact/org.codehaus.mojo/exec-maven-plugin/1.6.0/maven-plugin> | 2019-03-03T08:12:27.320000 | Lynne |
elmlang | general | Or this one <https://search.maven.org/artifact/org.apache.maven.plugins/maven-invoker-plugin/3.2.0/maven-plugin> | 2019-03-03T08:19:36.320200 | Lynne |
elmlang | general | That's very cool! I didn't know about `SelectList`, so thanks a lot. It's no surprise that it comes from <@Leonie> :slightly_smiling_face: | 2019-03-03T09:07:55.320400 | Dorsey |
elmlang | general | <@Jarvis> i was thinking of safe and typed version of `document.querySelector(#id).play()` | 2019-03-03T09:12:46.320600 | Cleveland |
elmlang | general | <@Cammy> looking forward too that | 2019-03-03T09:12:50.320800 | Cleveland |
elmlang | general | You have to be very careful with your id’s doing it with querySelector. That doesn’t sound hard, but in practice, I spend a lot of time helping people with this. | 2019-03-03T09:15:00.322300 | Cammy |
elmlang | general | that one of the reasons i don't want to do this with ids
because then in order to have arbitrary number of players on page i need to somehow keep track of player ids
which is much simple in js then elm i am guessing | 2019-03-03T09:20:32.322500 | Cleveland |
elmlang | general | <@Cammy> so that you are doing is for audio/video and not for DOM APIs in general right? | 2019-03-03T09:23:13.322800 | Cleveland |
elmlang | general | Around the media playback parts of the DOM API (play, pause, etc), as well as the other media apis. | 2019-03-03T09:25:01.324300 | Cammy |
elmlang | general | This is what I talked about at Oslo elm day.
Can I ask, what’s the use-case for having a lot of players on one page as opposed to one that switches sources? There’s a limit to the number of players some browsers can load on a page. | 2019-03-03T09:53:36.326700 | Cammy |
elmlang | general | By the way, the way I solved this in an earlier incarnation was generating an opaque type that contained the id, and using a Dict if I had multiple on the page. That was better than strings, but not 100%, at least through ports. | 2019-03-03T09:55:21.328500 | Cammy |
elmlang | general | if i can't have multiple players that would mean player is singleton which is just wrong
as for examples where you need more then one player take a look at <http://coub.com|coub.com>
or this <http://tv.myvideo.ge/> this is tv streaming built with react it has main player and on the left side if you hover over some channels they have preview of stream in a mini player
in my code mini player and main player is same component with different options passed to them
screenshot <https://imgur.com/a/Ax6kOMH> | 2019-03-03T10:22:54.329100 | Cleveland |
elmlang | general | So coub (atleast in the iOS app version) seems to only have one player at a time, which is the way something like that should work. I’ll have to take a look at how it works on a desktop browser later, but I see where this would be difficult to do with the current virtual dom implementation, but my new library should make this much easier while adhering to best practices for a good user experience, and increase performance over using 20+ individual media elements on a page.
I’m not sure, however, that we have the necessary capabilities in Elm currently to do this properly, the way that it works in the iOS native app. I really want to see what they’re doing in a desktop browser.
For previews, yeah, that’s a good use case, but I might suggest instead of having an arbitrary number of media elements, you only need two. The most videos that can be playing simultaneously is two: a main video and one preview at a time, assuming the previews only appear on mouseover.
If you have 40 linked videos on the page, you don’t want to load every preview at page load, it’ll eat a ton of bandwidth, and use a ton of bandwidth. Just load the appropriate preview as you mouseover...use fMP4 and encode the previews really small, and they should load quickly. This is generally the better of the two ways I’ve seen it done on sites like YouTube (the other is image sequences). | 2019-03-03T10:57:44.339600 | Cammy |
elmlang | general | Any packages for manipulating the RGB values of images? | 2019-03-03T11:09:00.340100 | Wendell |
elmlang | general | Or HSL, I guess. I’m color space agnostic. | 2019-03-03T11:09:39.340700 | Wendell |
elmlang | general | You mean like making a color image black and white or something? | 2019-03-03T11:09:49.341000 | Cammy |
elmlang | general | Sure, that’s a good example | 2019-03-03T11:10:20.341200 | Wendell |
elmlang | general | Don’t quote me on this, but for raw pixel manipulation, you probably need canvas. However, you can do a lot with css filters and svg filters. I suppose you could also write a jpeg or png decoder using elm/bytes, manipulate the data, then create a blob or something, but that seems nuts. | 2019-03-03T11:12:38.343900 | Cammy |
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