add solution: group-anagrams

Author: yihyun-kim1

group-anagrams/yihyun-kim1.js

@@ -0,0 +1,18 @@
+/**
+ * @param {string[]} strs
+ * @return {string[][]}
+ */
+const groupAnagrams = (strs) => {
+  const map = new Map();
+
+  for (const str of strs) {
+    const sorted = str.split("").sort().join("");
+
+    if (!map.has(sorted)) {
+      map.set(sorted, []);
+    }
+    map.get(sorted).push(str);
+  }
+
+  return [...map.values()];
+};