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lib/swiss/enum.ex
defmodule Swiss.Enum do
@moduledoc """
A few extra functions for dealing with Enums.
"""
@doc """
Applies `cb` to all elements in `enum`, ignores the return and returns `enum`.
## Examples
iex> Swiss.Enum.thru([1, 2, 3], fn a -> a + 1 end)
[1, 2, 3]
"""
@spec thru(Enumerable.t, function) :: Enumerable.t
def thru(enum, cb) do
Enum.map(enum, fn val ->
cb.(val)
val
end)
end
end