Function groupMapBy

Groups the elements of an array into a map, with the key being based on a key mapper, and the value being the values for the same key mapper result.

Since

6.1.0

See

groupMapReducingBy

Returns

Grouped map.

Example

groupMapBy([1, 2, 3, 4, 5], val => val % 2)
// => Map{0: [2, 4], 1: [1, 3, 5]}