capitalization.ex

defmodule String do
  def unique_capitalization(string) do
    string
    |> String.graphemes
    |> Enum.with_index
    |> Enum.map(fn {grapheme, index} ->
      if rem(index, 2) == 1, do: String.capitalize(grapheme), else: grapheme
    end)
    |> Enum.join
  end
end

# 'javascript' => 'jAvAsCrIpT'