Elixir

Phoenix is the rails like framework in the Elixir ecosystem.

Publishing a package to elixir

mix hex.publish

Ternary Operator

While elixir does not have a ternary operator, one can be achieved with:

if (expression), do: true_value, else: false_value

Behaviours

Behaviours are similar to interface in Object Oriented Programming. The behaviour module defines the generic interface, and the callback module implements that interface.

defmodule MyBehaviour do
  @callback vital_fun() :: any
  @callback non_vital_fun() :: any
  @macrocallback non_vital_macro(arg :: any) :: Macro.t
  @optional_callbacks non_vital_fun: 0, non_vital_macro: 1
end

And then an implementation would look like:

defmodule MyBehaviour do
  def vital_fun() do
    :hello
  end

  @macrocallback non_vital_macro(arg :: any) :: Macro.t
  @optional_callbacks non_vital_fun: 0, non_vital_macro: 1
end

Re-arranging Parameters in a call then

When dealing with a chain, and the result of the previous call needs to be pass into a position other than the first spot, use then

 |> get_value()
 |> then(fn value -> Map.put(some_map, "key", value) end)

or more succinctly using short hand:

 |> get_value()
 |> then(&(Map.put(some_map, "key", &1)))

Regex

Elixir Regex Tester

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