Group Permutations of the same strings in a given list in Javascript:
/**
* @param {string[]} strs
* @return {string[][]}
*/
const groupAnagrams = function(strs) {
const obj = {};
for (const str of strs) {
const key = str.split('').sort().join('');
(obj[key] || (obj[key] = [])).push(str);
}
return Object.values(obj);
};
console.log(groupAnagrams(['abc', 'bbc', 'cab', 'ccc']));
// [["abc", "cab"], ["bbc"], ["ccc"]]