Protocols

Protocols add polymorphic dispatch to Elixir. They are contracts implementable by data types.

The standard protocols are:

Protocol	Description
Collectable	collects data into a data type
Enumerable	handles collections in Elixir, as `Enum` module for eager functions and `Stream` module for lazy functions
Inspect	converts data types into their programming language representation
List.Chars	converts data types to their outside world representation as charlists (non-programming based)
String.Chars	converts data types to their outside world representation as strings (non-programming based)