Utility Methods
Utility Methods
Section titled “Utility Methods”join()
Section titled “join()”Converts array to string.
["a", "b", "c"].join("-");// "a-b-c"Time: O(n)
flat()
Section titled “flat()”Flattens nested arrays.
[1, [2, 3]].flat();// [1, 2, 3]Time: O(n)
flatMap()
Section titled “flatMap()”map + flat in one pass.
[1, 2, 3].flatMap(n => [n, n * 2]);// [1,2,2,4,3,6]Time: O(n)