This method is like flatMap except that it recursively flattens the mapped results up to depth times.
flatMap
depth
The collection to iterate over.
Optional
The function invoked per iteration.
The maximum recursion depth.
Returns the new flattened array.
5.4.0
[[flatMap]],[[flatMapDepth]],[[flatten]],[[flattenDeep]],[[flattenDepth]],[[map]],[[mapKeys]],[[mapValues]]
function duplicate(n) { return [[[n, n]]]}flatMapDepth([1, 2], duplicate, 2)// => [[1, 1], [2, 2]] Copy
function duplicate(n) { return [[[n, n]]]}flatMapDepth([1, 2], duplicate, 2)// => [[1, 1], [2, 2]]
This method is like
flatMapexcept that it recursively flattens the mapped results up todepthtimes.