A.Enum.frequencies_by
You're seeing just the function
frequencies_by
, go back to A.Enum module for more information.
Specs
frequencies_by(t(val), (val -> key)) :: %{optional(key) => non_neg_integer()} when val: value(), key: any()
Returns a map with keys as unique elements given by key_fun
and values
as the count of every element.
Mirrors Enum.frequencies_by/2
with higher performance for Aja structures.