acronym.exs

acronym.exs

module Acronym 
  def abbreviate(string) do
    string
    |> String.codepoints
    |> Enum.with_index
    |> Enum.reduce("", fn({letter, idx}, acronym) ->
      cond do
        String.upcase(letter) == letter and String.downcase(letter) != letter ->
          acronym <> letter
        String.at(string, idx-1) == " " ->
          acronym <> String.upcase(letter)
        true ->
          acronym
      end
    end)
  end
end