Misc code example updates

Use more idiomatic examples

1 files changed, 3 insertions, 4 deletions

diff --git a/src/code/2/fib_itr.exs b/src/code/2/fib_itr.exs
index 2eafcee..affd347 100644
--- a/src/code/2/fib_itr.exs
+++ b/src/code/2/fib_itr.exs
@@ -1,14 +1,13 @@
 defmodule Fib do
   def seq(0), do: 0
   def seq(1), do: 1
-  def seq(n) when n > 1, do: compute_seq(n, 1, [0, 1])
+  def seq(n) when n > 1, do: compute_seq(n, 1, [1, 0])
 
   defp compute_seq(n, i, acc) when n == i do
-    Enum.at(acc, length(acc) - 1)
+    hd(acc)
   end
   defp compute_seq(n, i, acc) do
-    len = length(acc)
-    compute_seq(n, i + 1, acc++[Enum.at(acc, len-1) + Enum.at(acc, len-2)])
+    compute_seq(n, i+1, [Enum.at(acc, 0) + Enum.at(acc, 1) | acc])
   end
 end