Time: 49 ms (25.79%), Space: 63.5 MB (46.1%) - LeetHub

Author: chappdev2019

0049-group-anagrams/0049-group-anagrams.js

@@ -8,10 +8,9 @@ function groupAnagrams(strs) {
     for (let i = 0; i < strs.length; i++) {
         let counter = new Array(26).fill(0);
         strs[i].split('').forEach(e => counter[e.charCodeAt(0)-'a'.charCodeAt(0)]++)
-        let key = counter.join();
-        let val = map.get(key) || [];
-        val.push(strs[i]);
-        map.set(key, val);
+        let key = String(counter);
+        if (!map.has(key)) map.set(key, []);
+        map.get(key).push(strs[i]);
     }
-    return [...map.values()];
+    return Array.from(map.values());
 }