Data commit

Task/Floyds-triangle/Elixir/floyds-triangle.elixir

@@ -0,0 +1,18 @@
+defmodule Floyd do
+  def triangle(n) do
+    max = trunc(n * (n + 1) / 2)
+    widths = for m <- (max - n + 1)..max, do: (m |> Integer.to_string |> String.length) + 1
+    format = Enum.map(widths, fn wide -> "~#{wide}w" end) |> List.to_tuple
+    line(n, 0, 1, format)
+  end
+
+  def line(n, n, _, _), do: :ok
+  def line(n, i, count, format) do
+    Enum.each(0..i, fn j -> :io.fwrite(elem(format,j), [count+j]) end)
+    IO.puts ""
+    line(n, i+1, count+i+1, format)
+  end
+end
+
+Floyd.triangle(5)
+Floyd.triangle(14)