50 lines
1.9 KiB
Markdown
50 lines
1.9 KiB
Markdown
Learn about the Elm programming language at [elm-lang.org](http://elm-lang.org/).
|
|
|
|
|
|
## Install
|
|
|
|
**Arch Linux:** follow [these directions](https://github.com/evancz/Elm/wiki/Installing-Elm#arch-linux) and then
|
|
jump to the [My First Project](#my-first-project) section.
|
|
|
|
**OS X 10.9:** follow
|
|
[these directions](http://justtesting.org/post/64947952690/the-glasgow-haskell-compiler-ghc-on-os-x-10-9)
|
|
before continuing!
|
|
|
|
Download the Haskell Platform 2012.2.0.0 or later. Once the Haskell Platform is installed:
|
|
|
|
cabal update
|
|
cabal install elm
|
|
cabal install elm-server
|
|
|
|
## Use
|
|
|
|
To use `elm` and `elm-server` you may need to add a new directory to your PATH.
|
|
|
|
Cabal should tell you where your executables are located upon
|
|
successful installation. It'll be something like `/home/evan/.cabal/bin`
|
|
which you should append to your PATH variable.
|
|
See this tutorial if you are new to changing your PATH in
|
|
[Unix/Linux](http://www.cyberciti.biz/faq/unix-linux-adding-path/).
|
|
|
|
## My First Project
|
|
|
|
Now we will create a simple Elm project.
|
|
The following commands will set-up a very basic project and start the Elm server.
|
|
|
|
mkdir helloElm
|
|
cd helloElm
|
|
printf "import Mouse\n\nmain = lift asText Mouse.position" > Main.elm
|
|
elm-server
|
|
|
|
The first two commands create a new directory and navigate into it. The `printf`
|
|
commands place a simple program into `Main.elm`. Do this manually if you do not
|
|
have `printf`. The final command starts the Elm server at [localhost:8000](http://localhost:8000/),
|
|
allowing you to navigate to `Main.elm` and see your first program in action.
|
|
|
|
#### Final Notes
|
|
|
|
The `elm` package provides support for compilation of Elm code directly in Haskell.
|
|
Check it out [on Hackage](http://hackage.haskell.org/package/Elm) if you are interested.
|
|
|
|
If you are stuck, email [the list](https://groups.google.com/forum/?fromgroups#!forum/elm-discuss)
|
|
or ask a question in the [#Elm IRC channel](http://webchat.freenode.net/?channels=elm).
|