We use the “env_helper” package as an example to pick apart exactly what each line of a Macro does. Most suited to beginners wondering exactly what is up with this “quote/unquote” stuff.

https://medium.com/perplexinomicon-of-philosodad/using-macros-to-handle-environment-variables-in-elixir-87bc81ea83dd#.2d33byv7v