valid-anagram solution

Author: 이호찬

valid-anagram/lhc0506.js

@@ -0,0 +1,26 @@
+/**
+ * @param {string} s
+ * @param {string} t
+ * @return {boolean}
+ */
+var isAnagram = function(s, t) {
+    if (s.length !== t.length) {
+        return false;
+    }
+
+    const charCountMap = {};
+
+    for (let char of s) {
+        charCountMap[char] = (charCountMap[char] || 0) + 1;
+    }
+
+    for (let char of t) {
+        if (!charCountMap[char]) {
+            return false;
+        }
+
+        charCountMap[char] -= 1;
+    }
+
+    return true;
+};