PassiveSupport.Enum.none-question-mark

You're seeing just the function none-question-mark, go back to PassiveSupport.Enum module for more information.
Link to this function

none?(enum, fun \\ &(&1))

Specs

none?(Enumerable.t(), function()) :: boolean()

Returns true if the given fun evaluates to false on all of the items in the enumberable.

Iteration stops at the first invocation that returns a truthy value (not false or nil). Invokes an identity function if one is not provided.

Examples

iex> test_list = [1, 2, 3]
...> none?(test_list, &(&1 == 0))
true
...> none?([0 | test_list], &(&1 == 0))
false

iex> none?([])
true

iex> none?([nil])
true

iex> none?([true])
false