elixir case statement
iex> case {1, 2, 3} do
...> {4, 5, 6} ->
...> "This clause won't match"
...> {1, x, 3} ->
...> "This clause will match and bind x to 2 in this clause"
...> _ ->
...> "This clause would match any value"
...> end
"This clause will match and bind x to 2 in this clause"