Use Collectable protocol with an empty map

2020-01-09 22:08:39 -06:00
parent de8f1f800f
commit 8887dbab1e
1 changed files with 1 additions and 2 deletions
--- a/lib/koans/20_comprehensions.ex
+++ b/lib/koans/20_comprehensions.ex
@@ -25,8 +25,7 @@ defmodule Comprehensions do
  end

  koan "Add the result of a comprehension to an existing collection" do
-    collection = ["Apple Pie"]
-    collection = for x <- ["Pecan", "Pumpkin"], into: collection, do: "#{x} Pie"
+    collection = for x <- ["Pecan", "Pumpkin"], into: %{}, do: {x, "#{x} Pie"}
    assert collection == ___
  end