Elixir algorithms don't work on Elixir 1.5.2

[auyer]

BFS fails on line 31:

Bug Bug ..!!** (ArgumentError) the Access calls for keywords expect the key to be an atom, got: 1 (elixir) lib/access.ex:329: Access.get/3 lib/bsf.ex:39: anonymous fn/3 in Bfs.frontier_adj/2 (elixir) lib/enum.ex:1826: Enum."-reduce/3-lists^foldl/2-0-"/3 lib/bsf.ex:31: Bfs.visit_frontier/3

And DFS Fails on line 22:

Bug Bug ..!!** (ArgumentError) the Access calls for keywords expect the key to be an atom, got: 1 (elixir) lib/access.ex:329: Access.get/3 lib/dfs.ex:22: Dfs.visit/3

[fmcgeough]

if the data structure is changed to a Map then the code should work.

Dfs.visit(1, %{
     1 =>  [2, 3, 4],
     2 =>  [1, 5, 6],
     3 =>  [1],
     4 =>  [1, 7, 8],
     5 =>  [2, 9, 10],
     6 =>  [2],
     7 =>  [4, 11, 12],
     8 =>  [4],
     9 =>  [5],
     10 => [5],
     11 => [7],
     12 => [7]
})
[1, 2, 5, 9, 10, 6, 3, 4, 7, 11, 12, 8]