elm

I have this data using http://jsonapi.org/ format: { "data": [ { "type": "prospect", "id": "1", "attributes": { "provider_user_id": "1", "provider": "facebook", "name": "Julia", "invitation_id": 25 } }, { "type": "prospect", "id": "2", "attributes": { "provider_user_id": "2", "provider": "facebook", "name": "Sam", "invitation_id": 23 } } ] } I have my models like: type alias Model = { id: Int, invitation: Int, name: String, provider: String, provider_user_id: Int } type alias Collection = List Model I want to decode the json into a Collection, but don't know how. fetchAll: Effects Actions

Disclaimer: I'm brand new to Elm I'm fiddling around with the online Elm editor and I've run into an issue. I can't find a way to get certain special characters (copyright, trademark, etc.) to show up. I tried: import Html exposing (text) main = text "©" All that showed up was the actual text © . I also tried to use the unicode character for it \u00A9 but that ended up giving me a syntax error: (line 1, column 16): unexpected "u" expecting space, "&" or escape code The only way I found was to actually go to someone's website and copy/paste their copyright symbol into my app: import Html

I'm learning about Elm from Seven More Languages in Seven Weeks . The following example confuses me: import Keyboard main = lift asText (foldp (\dir presses -> presses + dir.x) 0 Keyboard.arrows) foldp is defined as: Signal.foldp : (a -> b -> b) -> b -> Signal a -> Signal b It appears to me that: the initial value of the accumulator presses is only 0 on the first evaluation of main after the first evaluation of main it seems that the initial value of presses is whatever the result of function (a -> b -> b) , or (\dir presses -> presses + dir.x) in the example, was on the previous evaluation.

I have an Elm package (source + all build artifacts) in a local directory, and I would like to use it from another Elm package, without publishing the library. So my directory setup looks like this: / my-lib/ elm-package.json my-app/ elm-package.json First of all, running elm-package install in the library package's directory doesn't seem to do anything more than just building the package; it doesn't get installed in any global directory as far as I can tell. I've added my-lib to my-app/elm-package.json as such: "dependencies": { "elm-lang/core": "1.0.0 <= v < 2.0.0", "my-vendor/my-lib": "0.0

In the following code taken from Elm Form Example , line 122, what does the << operator mean? Field.field Field.defaultStyle (Signal.send updateChan << toUpdate) "" content Couldn't find it in Elm syntax reference . Does it mean, when the field changes, instead of sending its content to updateChan , send toUpdate to updateChan ? Mirzhan Irkegulov << is a function composition operator, defined in core library Basics . All functions from Basics are imported into Elm projects unqualified. Elm's type system Let's recall basics of Elm type system. Elm is statically typed . This means that in Elm

I'm looking into doing some reactive programming in the browser and comparing angular.js ( http://angularjs.org/ ) with Elm ( http://elm-lang.org/ ). What are the relative benefits / problems with each? Alexander I think they are different beasts, IMO, although they do share the goal of being as declarative as possible, and an attitude of "hey, let's do things They Way We Should Be Doing Them ". Now, with AngularJS you're still in "familiar" territory. Meaning, you write some markup over here, write some JS over there, and then you serve it. Same workflow as usual. The "innovation" of

Got a hopefully simple problem. When I receive action A in my update function, I'd like to return a task that does some stuff, then results in action B, which is received by the update function again. Its my understanding that whatever effects are returned from Update will be executed by startapp, but nothing seems to be happening. Here's a whittled down example: import StartApp exposing (start) import Effects import Task import Html exposing (..) import Html.Events exposing (..) main = (start { init = init , update = update , view = view , inputs = [] }).html type Action = Click | Dummy type

I am making a simple Elm application with the following model: type alias Model = { num : Float , str : String , list : List Float , serverResponse : String } I am following the Todo-MVC example and I have a similar architecture: type Action = NoOp | ChangeNum String | ChangeStr String ... view : Model -> Html view model = ... update : Action -> Model -> Model update action model = case action of ... main : Signal Html main = Signal.map view model model : Signal Model model = Signal.foldp update initialModel (Signal.subscribe updates) initialModel : Model initialModel = ... updates : Signal

I am playing around with elm-css . Most of the things work as I expect them. But I am not able to give a correct value to the Css.opacity function. Here is what I have tried: Css.opacity 0.5 which gives the error: Function `opacity` is expecting the argument to be: Css.Number compatible But it is: Float The Css.Number is a type alias in the following form: type alias Number compatible = { compatible | value : String, number : Compatible } But I don't understand how to create a valid value for the Css.opacity function... You can create input for opacity by using one of the "unitless" functions,