Another update from ingydotnet^djgoku

Task/Zig-zag-matrix/Elixir/zig-zag-matrix.elixir

@@ -0,0 +1,14 @@
+defmodule RC do
+  require Integer
+  def zigzag(n) do
+    indices = for x <- 1..n, y <- 1..n, do: {x,y}
+    sorted = Enum.sort_by(indices, fn{x,y}->{x+y, if(Integer.is_even(x+y), do: y, else: x)} end)
+    sorted2 = Enum.sort(Enum.with_index(sorted))
+    Enum.each(sorted2, fn {{_x,y},i} ->
+      IO.write "#{i} "
+      if y==n, do: IO.puts ""
+    end)
+  end
+end
+
+RC.zigzag(5)