tree.ex

# center a string s on position c
# cent("0", 5)   => "  0  "
# cent("000", 5) => " 000 "
# but we ignore right side spaces
cent = fn(s, c) ->
  String.duplicate(" ", div(c - String.length(s), 2)) <> s
end

# piping through partials?
# SAAD PUPPY :'(
12 |> (&String.duplicate("0", &1)).()

IO.puts(Enum.join(
  Enum.map([1,3,5,7,9,11],
           &(cent.(String.duplicate("0", &1), 15))), "\n"))