Enum.find_index
You're seeing just the function
find_index
, go back to Enum module for more information.
Specs
find_index(t(), (element() -> any())) :: non_neg_integer() | nil
Similar to find/3
, but returns the index (zero-based)
of the element instead of the element itself.
Examples
iex> Enum.find_index([2, 4, 6], fn x -> rem(x, 2) == 1 end)
nil
iex> Enum.find_index([2, 3, 4], fn x -> rem(x, 2) == 1 end)
1