elixir: list-ops: ListOps:count/1 using our reduce/3
elixir: list-ops: tidying
elixir: list-ops: reordering
elixir: list-ops: reverse using our reduce instead of recursion
elixir: list-ops: reorg
elixir: list-ops: rewrite append/2 to use reduce/3
elixir: list-ops: rewrite map/2 to use reduce/3
elixir: list-ops: rewrite filter/2 using reduce/3