Elixir

Anonymous functions

Mar 26, 2016

You can define anonymous functions using fn:

iex> multiply = fn (x,y) -> x + y end
iex> multiply.(2,3)
6

You can use & for shorthand form, where &N refers to the N-th parameter:

iex> multiply = &(&1 * &2)
iex> multiply.(2,3)
6

Functions can have multiple clauses using pattern matching:

fn
  {:ok, result} -> "Success: #{result}"
  {_, error} -> "Error: #{error}"
end