List.keymember-question-mark
You're seeing just the function
keymember-question-mark
, go back to List module for more information.
Specs
keymember?([tuple()], any(), non_neg_integer()) :: boolean()
Receives a list of tuples and returns true
if there is
a tuple where the element at position
in the tuple matches
the given key
.
Examples
iex> List.keymember?([a: 1, b: 2], :a, 0)
true
iex> List.keymember?([a: 1, b: 2], 2, 1)
true
iex> List.keymember?([a: 1, b: 2], :c, 0)
false