[elm-discuss] Re: Array map with start and end

Hi Francisco, just a few words about arrays and image manipulation. I've been doing some work along this way and encountered multiple issues. One of them was with slicing. If I'm not wrong Robin's work will be merged in 0.19 but meanwhile, you should be aware that there are few issues with the

Re: [elm-discuss] Re: Array map with start and end

Hi again, So out of curiosity, I just spend a couple hours looking for variations of: "(immutable/persistent) (tensor/multidimentional array/multidimentional data structure) implementation" and my conclusion is that I did not easily find examples of implementations of data structures tailored fo

Re: [elm-discuss] Re: Array map with start and end

> > Do you need to rebuild the compiler for this? > I'm not familiar with so called "native" elm 0.18 code. So I wanted to use the example given by Robin with `Elm/JsArray.elm` and `Elm/Kernel/JsArray.js` from elm master branch to try the same thing with `JsArrayBuffer.[elm/js]`. Since this is

[elm-discuss] Re: Array map with start and end

Following your advice, I came back to elm 0.18 and just started a repository to try to wrap JS typed arrays in elm. I've moved the discussion to a new post [1] since we were drifting from the original post here. Cheers [1] JS typed array implementation for elm: https://groups.google.com/d/topic

Re: [elm-discuss] JS typed array implementation for elm

I've started API design thinking in this issue [1]. Say hello there if you'd like to participate, any help appreciated :) [1] Github issue: https://github.com/mpizenberg/elm-js-typed-array/issues/1 -- You received this message because you are subscribed to the Google Groups "Elm Discuss" group

[elm-discuss] Pointer (mouse/touch/pointer) events community coordination attempt

PS: duplicate of reddit for people not using reddit (https://www.reddit.com/r/elm/comments/7gksya/pointer_mousetouchpointer_events_community/) Hi folks, I've been browsing the elm packages repository in search of packages dealing with pointer events in general, mouse / touch / pointer. My conc

[elm-discuss] Re: How to walk my own implementation of an array

Hi Francisco, I think there is a confusion here. If you keep the same buffer, your matrice [1 3; 7 9] will be represented by { strides = (6, 2), shape = (2,2) } not strides = (2,2). Because 6 is the jump from one line to the other (1 to 7). Let me know if I'm mistaking or not clear. On Friday,

[elm-discuss] Re: How to walk my own implementation of an array

Regarding your question, walking the array is not complicated I think. You can just walk the underlying buffer, and use a function like below if I'm not mistaking. location : Int -> Int -> Strides -> Shape -> Maybe Location location bufferIndex bufferOffset (stride1, stride2) (height, width) =

[elm-discuss] Re: How to walk my own implementation of an array

Oops, not as trivial as I thought ahah. Forget previous answer. It may require just some little adjustment though, I will think about it. On Monday, December 4, 2017 at 3:49:23 PM UTC+8, Matthieu Pizenberg wrote: > > Regarding your question, walking the array is not complicated I thin

[elm-discuss] Re: How to walk my own implementation of an array

I wasn't very far ^^ here is the function: location : Int -> Int -> ( Int, Int ) -> ( Int, Int ) -> Maybe ( Int, Int ) location bufferIndex offset ( str1, str2 ) ( height, width ) = let unOffset = bufferIndex - offset ( line, lineRest ) = ( unOffset //

Re: [elm-discuss] Re: How to walk my own implementation of an array

> I wouldn't want to go through hundreds of thousands for just one thousand. > That's why I'm trying to come up with a function that have the behavior I > described initially, "nextlocation". Along with "index" function I can work > out in O(1) the index for the next one Yep sorry, I didn't

[elm-discuss] Correct use of port subscriptions in a submodule reused multiple times?

Hi, I am currently struggling with port subscriptions in a submodule (`Part`) reused multiple times in a bigger (`Group`) module like: -- In Group.elm type alias Model = { parts : Array Part.Model } I've been using the following "batching" technique (here are the relevant parts of 3 files: Pa

[elm-discuss] Re: Correct use of port subscriptions in a submodule reused multiple times?

Thanks OverminDL1 and Wouter In t Velt, I will try to explain how I have come to this issue. Originally, I have designed a web page (the "part") that was loading a collection of images to display them. So the flow was: - init the elm page with a list of images urls - [port] send the urls to JS

[elm-discuss] Possible compiler bug while parsing type annotation in a let ?

Hi, I just came accross one very strange compiler error and wanted to have the point of view of the community before creating any github issue. I wrote some code to create tag more easily (seems to be trendy these days ^^) in a module Helpers.Views.elm. When I put a type annotation for a very

[elm-discuss] Re: Gestures in Elm

Hi, m.hag... ;) Just to say that I am with you and would love to have support of these also. As maybe a small step I wrote recently a slightly more complete library handling also multitouch events, not only single touches.

Re: [elm-discuss] Possible compiler bug while parsing type annotation in a let ?

Oh cool, thank you for the info, I will just comment it for now then. On Friday, November 11, 2016 at 5:09:31 PM UTC+8, Janis Voigtländer wrote: > > What you encountered is > https://github.com/elm-lang/elm-compiler/issues/1214, and it is fixed in > version 0.18 of the compiler. > -- You recei

[elm-discuss] Open discussion about optimization of code potentially triggered very often (mousemove) ?

Hi everyone, I am currently developing some functionality that get triggered on mousemove. I do not have any speed issue now so I am not trying to optimize things that do not need optimization right now ^^. But this work made me curious about how code is optimized in elm. In this blog post [1]

Re: [elm-discuss] Re: Open discussion about optimization of code potentially triggered very often (mousemove) ?

once per > frame. > > > lørdag 19. november 2016 15.51.56 UTC+1 skrev Matthieu Pizenberg følgende: >> >> Hi everyone, >> >> I am currently developing some functionality that get triggered on >> mousemove. I do not have any speed issue now so I am not trying to optimiz

[elm-discuss] Re: Proposal: Shorter qualified imports

Hi, I am quite often doing the same thing (plus exposing the main type having the same name than the module) like: import Module.Something as Something exposing (Something) What I am concerned about is that it would be implicit, and all implicit things tend to lead to confusion. On Sunday, No

Re: [elm-discuss] Re: Open discussion about optimization of code potentially triggered very often (mousemove) ?

I have been trying something that I think could be shared. Basically I tried to see if it was possible to throttle commands by controlling the event attributes in the view that generate those commands. Well, turns out, not really ^^. The idea was the following: * In the model, have an attribute

Re: [elm-discuss] Re: Open discussion about optimization of code potentially triggered very often (mousemove) ?

... if > `active` is already set to False, ignore the MoveMsg update entirely. That > way you guarantee you aren't triggering multiple calls to Reactivate. > > > On Sun, Nov 20, 2016 at 1:24 AM, Matthieu Pizenberg < > matthieu.pizenb...@gmail.com> wrote: > >&g

Re: [elm-discuss] Unpublishing a package

On Tuesday, November 22, 2016 at 1:52:09 PM UTC+8, Peter Damoc wrote: > > On Tue, Nov 22, 2016 at 1:33 AM, Richard Feldman > wrote: > >> There is no unpublish feature, and it's important that there never be one >> . :) >> > > What would

Re: [elm-discuss] Proposed addition for Task package

Hi, I am on Wouter side on this. As a newcomer, I was not aware of these things. I figured out a way to do this sendMsg function (which I called at the time msgToCmd ^^) because I needed it at some point. And since it was "so convenient" I ended up using it all the time instead of calling the a

[elm-discuss] Feedback on a new package for debouncing and throttling of messages

Hi all, I just release a package (mpizenberg/elm-debounce ) for debouncing and throttling of messages. Any feedback would be great! For the story about why another debouncing and throttling package: Initially, I wanted to use

[elm-discuss] Re: Elm events 2017

Hi, Just to say that there is one meetup in Paris tomorrow: https://www.meetup.com/Meetup-Elm-Paris/events/236216040/ It seems to be already full though. There is another one in Amsterdam 1st of February: https://www.meetup.com/Elm-Amsterdam/events/236942429/ Kind of a hacking night. 15 spots

[elm-discuss] Re: Emphasizing /r/elm more

I would also like to keep something like this group. The fact that every one get a chance to be read by the community (without being downvoted or just ignored) is very important. A few times in Stack Overflow I have asked somewhat hard/specific questions with nobody caring answering it because i

[elm-discuss] Re: Emphasizing /r/elm more

Hi again, since this is not the first time that this matter is discussed, and since this time Evan launched it, it means that it is an important matter for the community and it's going to evolve anytime soon ^^. So, instead of discussing it here with passion and obvious bias since we are on the

[elm-discuss] Re: POST Http.request in Elm 0.18

Hi, in case it may be of help, I just did a small test elm project using web api which is available at this repo . Basically it was to test a way to use api (and authentified api using JWT) that I adapted from a 0.17 tutorial available on the Auth0 web

Re: [elm-discuss] Re: Emphasizing /r/elm more

I've got for this: > > *Which of the following do you read / contribute to?* > > - Elm Slack > - elm-discuss mailing list > - elm-dev mailing list > - Twitter discussions > - Facebook groups > - Elm subreddit > - Elm weekly newsletter > - Elm town podcast > &

Re: [elm-discuss] State of Elm Survey 2017 is live

Hey, I just participated in the survey :) A few remarks before forgetting: - I am not sure large scale notations (0->10) with only indications of what the 2 ends are, are a good thing in surveys. 0 to 3 is very often enough (not at all / small / medium / high ) - The question "What is your level

Re: [elm-discuss] Re: Emphasizing /r/elm more

Yep he definitely should evan-gelize more. ... (OK I'm out) On Jan 27, 2017 19:46, "Duane Johnson" wrote: On Fri, Jan 27, 2017 at 10:52 AM, Rex van der Spuy wrote: > And, I hope he always remains the sole maintainer and developer of the > language, because, frankly, I just don't trust anyone

[elm-discuss] Re: 0.18 Chaining Http requests

Hi Kingsley, Regarding point 2, the Http.send function enables you to create Cmd messages from http requests, and as you mentionned, Cmd.batch can

[elm-discuss] Linear algebra (matrix, vectors, ...) in the context of image processing

I'm currently looking for a library to do some basic image processing and matrix manipulation stuff. I have a research background (mostly spending time in Matlab), and currently preparing a user study. Elm has been great for my needs so far, but I'm encountering now a few obstacles. Types and

[elm-discuss] Re: Post Examples of Painful Record Updates Here!

Hi Antoine, just to let you know that you could write: ( { model | mode = case model.mode of Drawing (Just shape) -> Drawing <| Just <| Shapes.setID id shape _ -> model.mode } , Cmd.none ) Nested pattern matching is allowed for ma

Re: [elm-discuss] Linear algebra (matrix, vectors, ...) in the context of image processing

Thanks Ian for the link. I will keep this work in mind though I don't think I could use it for my current project. It seems focused on rgbd matrix data type which is great for transparent dynamic graphics. Svg representation does really suits my needs for now since I'm visualizing non changing data

[elm-discuss] What about partial public exposition of private types?

Hi everyone, I would like to have the point of view of the community regarding some private/public types code organisation. I have some types very useful to many sub modules that are currently publicly exposed in a Types module. In order to hide the type implementation, I wonder what you think

[elm-discuss] Recent Mozilla Tech announcement regarding Web Assembly

Hey everyone, today is a very good day (as any Elm coding day ^^). Mozilla Tech just made an article : Why WebAssembly is a game changer for the web — and a source of pride for Mozilla and Firefox

Re: [elm-discuss] Recent Mozilla Tech announcement regarding Web Assembly

> > There's a GSoC project suggestion on this at > https://github.com/elm-lang/projects#explore-webassembly - otherwise, I > think that's as far along as planning has gone. If you're a student and > interested, you might apply to take it on! :D > Technically I am, but far too busy with my PhD

[elm-discuss] Re: What about partial public exposition of private types?

> > However, as the constructor for Animation is exposed by its module, I am > not prevented from deconstructing it or pattern matching against it. > Hmm, I tried to do this but got errors as I thought: Cannot find pattern `Animation` 6| f (Animation { steps, running }) =

[elm-discuss] Re: What about partial public exposition of private types?

> > So I think a type becomes opaque if its constructors are not exposed, or > if its module is not exposed. > It might be better in that case, if the compiler just referred to the > opaque type as Animation.State? > Actually, the compiler can do that. I just checked and figured that it was a

[elm-discuss] Re: What about partial public exposition of private types?

> > Did calling the type and its alias both 'Test' somehow override the > private one with the public one? > No actually it is misleading you here. The main difference is that when I write: -- module Test exposing (testFunction) import Public exposing (Test) import Private testFunction : Test

Re: [elm-discuss] Re: elm + reactive programming

> Let's consider throttling. > ... > What you are describing here Mark is almost exactly what I implemented in mpizenberg/elm-debounce [1]. I have no experience in observables and unfortunately, do not know yet about effect managers so it is done with messages. I agree that it has been painf

[elm-discuss] Uncaught TypeError with a value obtained from a decoder

Hi, this morning I got into a weird bug with a value obtained from a decoder. I got elm code compiling but runtime error. I have this inside an update: let groundtruth : Maybe RLE groundtruth = Decode.decodeString RLE.decode rleString |> Result.toMaybe -- The prob

Re: [elm-discuss] Uncaught TypeError with a value obtained from a decoder

Thanks Peter, After a long process of reducing the code, it came down to (in REPL): > Array.append (Array.repeat 993 False) (Array.repeat 1 True) TypeError: Cannot read property 'length' of undefined Whereas with 992 instead of 993, it works fine. Should I report this as an issue? -- You recei

Re: [elm-discuss] Uncaught TypeError with a value obtained from a decoder

> > Looks like you hit on this issue: > https://github.com/elm-lang/core/issues/444 > Seems to be the case indeed. > Have you tried switching to a different implementation? > http://package.elm-lang.org/packages/Skinney/elm-array-exploration/2.0.2 > Not yet, thanks for the advice, I will tr

[elm-discuss] elm-package install doing nothing?

Hi, did something like this already happened to you? My elm-package.json : { ... "dependencies": { "elm-lang/core": "5.1.1 <= v < 6.0.0", "elm-lang/html": "2.0.0 <= v < 3.0.0", "elm-lang/window": "1.0.1 <= v < 2.0.0", "elm-lang/navigation": "1.0.1 <= v < 2.

[elm-discuss] Re: elm-package install doing nothing?

Oups sorry for the noise discussion thread. A wrong copy paste and my version specified for elm-navigation was too old (1.0.1 instead of 2.1.0). This was causing elm-package to do nothing. On Friday, March 17, 2017 at 3:34:26 PM UTC+8, Matthieu Pizenberg wrote: > > Hi, did something lik

[elm-discuss] Re: Post Examples of Painful Record Updates Here!

Here is a somewhat painful record update: setImage : String -> String -> Image -> Model -> Model setImage tool url image model = let mapping = case tool of "rectangle" -> .rectangle model.resourcesMapping "outline" ->

[elm-discuss] Better syntax for nested pattern matching (destructuring)?

Multiple times in my projects, I happen to need nested pattern matching. Below is a raw extract of code (in an update) showing this need. Study.ScribblesMsg scribblesMsg -> case model.study.status of Study.Progressing steps -> case Pivot.getC steps of Study.

[elm-discuss] Re: Better syntax for nested pattern matching (destructuring)?

> > We have found that this pattern is typically a good case for chaining a > bunch of andThen statements with a withDefault statement at the end > together. The one thing is you would have to be able to adjust your values > to all be Maybes. > Yes Christian, I am wondering if people are awar

Re: [elm-discuss] Re: Better syntax for nested pattern matching (destructuring)?

> > model.study.status > |> getProgressingSteps > |> Maybe.map Pivot.getCurrent > |> Maybe.andThen getScribbles > |> Maybe.map (Scribbles.update scribblesMsg model) > |> Maybe.withDefault model > ... > Thank you Aaron, that makes it definitely more readable! Those getters are the

Re: [elm-discuss] Re: Better syntax for nested pattern matching (destructuring)?

> > Instead of calling it 'getVar3', I am using names like 'whenWithVar3'. The > 'when' part better reflects that the operation will not always produce a > result. 'whenWith' is a bit long, perhaps 'whenVar3' might be better? > This sounds well also. I've no idea though about conventions that m

Re: [elm-discuss] Linear algebra (matrix, vectors, ...) in the context of image processing

> I think ultimately Elm could be a great language for working with binary > data but it's not there yet. Indeed ^^. In case you're still interested, I posted there what I did (at the end) : https://groups.google.com/forum/#!searchin/elm-discuss/pizenberg|sort:relevance/elm-discuss/u_ui3PlDw

[elm-discuss] Re: Elm "missing library / I was blocked by ..." scoreboard?

It looks a lot like something that could be done on reddit from the images I've seen on this website. I've no idea how reddit works though, I'm not a user. Could this be done with some kind of reddit channel or subreddit or whatever ? Another option I see, is someone doing *some kind of a "stat

[elm-discuss] Re: Charty: SVG charts library (feedback request)

Hi Juan, I just checked the demo app and the two plots there look great. But what is it in elm-plot or elm-visualization (to cite the two most known elm lib

[elm-discuss] Re: Linear algebra for 2d geometry?

I definitely recommend looking at https://github.com/opensolid/geometry (with it's svg counterpart : https://github.com/opensolid/svg). I've been using it a bit and it's awesome for what I understand you want. I've been using eeue56/elm-flat-matrix also but for more "raster" drawings than "vecto

Re: [elm-discuss] ADL: possible language for serialization

I've no idea if the name picked was done purposely but the purpose looks similar to ADL (https://en.wikipedia.org/wiki/Architecture_description_language). This language is used as a modeling language to create and manipulate systems. If I remember well, we used it in software engineering course

[elm-discuss] Best practices to create examples for an elm package?

Exploring a bit the packages repository, I've come accross the following options: 1. no examples/ dir, all in readme and documentation. (elm-array-exploration, ...) 2. examples/ dir with nothing more than `.elm` files (elm-decode-pipeline, elm-monocle, ...) 3. examples/ dir with an `elm-package

[elm-discuss] Announce: new package (elm-mouse-events), major update (elm-touch-events)

Hi all, Since I often need coordinates of mouse events and was getting tired of recoding the json encoders / decoders for each project, I made a package for this: mpizenberg/elm-mouse-events . The main differences from mb

[elm-discuss] Re: Missing json decoding tool to decode multitouch events cleanly

On Monday, May 8, 2017 at 11:36:13 PM UTC+8, Erik Lott wrote: > > Yeah, I think you spotted my bad logic. You're talking about functions > like this, right? > Yep that was it :) -- You received this message because you are subscribed to the Google Groups "Elm Discuss" group. To unsubscribe fr

[elm-discuss] Re: Best practices to create examples for an elm package?

> > - Use elm-doc-test for examples whereever possible > - If you have views, use elm-html-test. > Thanks Noah, I didn't know about those for lack of using tests. Thank you everyone for your feedback. So if I sum up, the main ideas are: 1. Keep in sync doc examples by using doc tests. 2. For mo

[elm-discuss] Re: How to manage long running computations in Elm?

On Wednesday, June 7, 2017 at 4:08:37 PM UTC+8, Rupert Smith wrote: > > On Tuesday, June 6, 2017 at 3:20:42 PM UTC+1, Rupert Smith wrote: >> >> The problem with long running computations in a single threaded UI is >> that they may cause the UI to block and become unresponsive for a period. >> Def

[elm-discuss] Re: The way forward for Elm Arrays

On Monday, June 12, 2017 at 7:15:59 AM UTC+8, Robin Heggelund Hansen wrote: > > I've been doing some thinking on how to improve Arrays in Elm. > Thanks alot for this work on an alternative array implementation! It's awesome! It's one of some challenges to use elm for my needs (scientific program

[elm-discuss] Re: How to manage long running computations in Elm?

> > One thing that I think I would have tried in this case, it to delegate the > long running computation to a webworker > , and then talk with it through > a port. I'm not from the web community. I had bases in html+css+js, but pretty much had to re

[elm-discuss] Re: deprecating packages?

Hello Raoul, just a few remarks about your post: This output you show in the first message `Here are some ...`, is this an output of the compiler? If so, and if you found it a bit confusing there is something awesome you can do. Great error messages in the elm ecosystem are important, so there

[elm-discuss] Re: Elm `reusable views`

Could the size be left to specify by the css of the user of the library? You would need to enable user to give the class name they want for this. On Thursday, August 3, 2017 at 4:43:21 PM UTC+8, enetsee wrote: > > Hi, > > I have been trying to create a `resuable view` following the structure >

[elm-discuss] Re: Discovering Elm packages

Wow, that's awesome! when are your next holidays? ^^ On Wednesday, August 9, 2017 at 10:37:40 AM UTC+8, Ryan Rempel wrote: > > There are new or updated Elm packages every day. > > Well, not quite every day -- there were none on July 30, 2017. Before > that, the previous day without any new or upd