Time: 77 ms (53.55%) | Memory: 56.8 MB (21.96%) - LeetSync

451-sort-characters-by-frequency/sort-characters-by-frequency.js

@@ -0,0 +1,20 @@
+/**
+ * @param {string} s
+ * @return {string}
+ */
+var frequencySort = function(s) {
+    const counter = new Map();
+    for (const char of s) {
+        counter.set(char, (counter.get(char) || 0) + 1);
+    }
+
+    const pq = Array.from(counter.entries());
+    pq.sort((a, b) => b[1] - a[1]);
+
+    let result ='';
+
+    for(const [char, freq] of pq) {
+        result += char.repeat(freq);
+    }
+    return result;
+};