Update 389-find-the-difference.js

Author: everthis

389-find-the-difference.js

@@ -1,3 +1,17 @@
+/**
+ * @param {string} s
+ * @param {string} t
+ * @return {character}
+ */
+const findTheDifference = function(s, t) {
+  let xor = 0
+  for(let i = 0, len = s.length; i < len; i++) xor = xor ^ s.charCodeAt(i) ^ t.charCodeAt(i)
+  xor = xor ^ t.charCodeAt(t.length - 1)
+  return String.fromCharCode(xor)
+};
+
+// another
+
 /**
  * @param {string} s
  * @param {string} t