Function groupAnagrams

javascript/0049-group-anagrams.js:9–15

(words, map = new Map())

 * @return {string[][]}
 */
var groupAnagrams = (words, map = new Map()) => {
    if (!words.length) return [];

    groupWords(words, map); /* Time O(N * (K * log(K)) | Space O(N * K) */

    return [...map.values()]; /* Time O(N)               | Space O(N * K) */
};

var groupWords = (words, map) => {
    for (const original of words) {