48 lines
1.7 KiB
Markdown
48 lines
1.7 KiB
Markdown
Learn about the Elm programming language at [elm-lang.org](http://elm-lang.org/).
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## Install
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Download the [Haskell Platform 2012.2.0.0](http://hackage.haskell.org/platform/).
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Elm definitely works with GHC 7.4, so newer versions of the Haskell Platform may work too.
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Once the Haskell Platform is installed:
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cabal update
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cabal install elm
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cabal install elm-server
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## Use
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To use `elm` and `elm-server` you may need to add a new directory to your PATH.
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Cabal should tell you where your executables are located upon
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successful installation.
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For me, the executables were placed in `/home/evan/.cabal/bin` which I
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appended to the end of my PATH variable in my .bashrc file.
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See this tutorial if you are new to changing your PATH in
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[Unix/Linux](http://www.cyberciti.biz/faq/unix-linux-adding-path/).
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## My First Project
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Now we will create a simple Elm project.
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The following commands will set-up a very basic project and start the Elm server.
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mkdir helloElm
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cd helloElm
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printf "import Mouse\n\nmain = lift asText Mouse.position" > Main.elm
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elm-server
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The first two commands create a new directory and navigate into it. The `printf`
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commands place a simple program into `Main.elm`. Do this manually if you do not
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have `printf`. The final command starts the Elm server at [localhost:8000](http://localhost:8000/),
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allowing you to navigate to `Main.elm` and see your first program in action.
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#### Wrap up
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The `elm` package provides support for compilation of Elm code directly in Haskell and QuasiQuoting.
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Check it out on Hackage if you are interested.
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If you are stuck, email [the list](https://groups.google.com/forum/?fromgroups#!forum/elm-discuss)
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or ask a question in the [#Elm IRC channel](http://webchat.freenode.net/?channels=elm).
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