Elixir playground, pt 1

gistfile1.txt

Given the module:

import Enum

defmodule D do
    def transpose(t) do
        map(0..count(at(t, 0))-1, fn(x) -> map(t, fn(y) -> at(y, x) end) end)
    end
end


This produces

iex(7)> m=[[1,2],[3,4]]
[[1, 2], [3, 4]]
iex(8)> transpose(m)
[[1, 3], [2, 4]]