Enum.flat_map_reduce/3
defmodule Enum do
def flat_map_reduce(enumerable, acc, fun)
end
Maps and reduces an enumerable
, flattening the given results (only one level deep).
It expects an accumulator acc
and a function fun
that receives each enumerable element, and must return a tuple containing a new enumerable (often a list) with the new accumulator.
The map-reducing may end before processing all the enumerable if the fun
function returns a tuple with :halt
as first element and the accumulator as second.