Metaprogramming Elixir

MIME-Type Conversion in Ten Lines of Code

If you’ve ever written a web service, you’ve probably needed to validate and convert MIME types to their file extension. For example, when a request comes into the server with an Accept header of application/javascript, we must know how to handle this MIME type and render a .js template. To tackle this problem in most languages, we would store the MIME data in a map and consult the keyspace for MIME-type conversions. This can become tedious with large datasets where we would need to convert the data by hand into a format representable within our programs. Fortunately, Elixir makes this easy for us with just a touch of metaprogramming. Head back over to your editor and let’s get to work.

Making Use of Existing ...