iex> Enum.map(1..3, fn x -> x * 2 end) [2, 4, 6] iex> map = %{"a" => 1, "b" => 2} iex> Enum.map(map, fn {k, v} -> {k, v * 2} end) [{"a", 2}, {"b", 4}]
Enum.map([0, 1, 2, 3], fn(x) -> x - 1 end) [-1, 0, 1, 2]