Elm themed hack night #2. Encoders and decoders

Install

Make sure you have elm and npm installed. npm usually comes bundled with nodejs and elm install instrutions can be found at elm-lang.org

Make sure you are in the root folder of the project, then run:

npm install
elm-package install

Run it

Right now you need to have 2 separate processes if you want to run and watch both the server and the elm code.

To run and watch elm code: npm run elm
To run and watch server: npm run server

You should now see something at localhost:3000, if it compiles

Task

Fill in the decoder and encoder for "medium user".

Bonus: For those who solve the "medium user", there's a "complex user" on the server. Check out server.js to see it's structure. Make a GET request and decoder to get it at /complex-user

Extra bonus: POST a medium user

Resources

• http://package.elm-lang.org/packages/elm-lang/core/latest/Json-Encode
• http://package.elm-lang.org/packages/elm-lang/core/5.1.1/Json-Decode
• http://package.elm-lang.org/packages/circuithub/elm-json-extra/latest/Json-Decode-Extra