Update 242-Valid-Anagram.js

we should we hasOwnproperty because for value zero case if condition fails

Author: chaitanyax

javascript/242-Valid-Anagram.js

@@ -4,6 +4,8 @@
  * @return {boolean}
  */
 var isAnagram = function(s, t) {
+    
+    //solution 1
     let map = {};
 
     if (s.length !== t.length) {
@@ -28,7 +30,28 @@ var isAnagram = function(s, t) {
 
     return true;
 
-    
-    
-    
+    //solution 2
+    if(s.length !== t.length) {
+        return false;
+    }
+    let sMap = {};
+    let tMap = {};
+    for(let i = 0; i < s.length; i++) {
+        if(sMap.hasOwnProperty(s[i])) {
+            sMap[s[i]]++
+        } else {
+            sMap[s[i]] = 1;
+        }
+        if(tMap.hasOwnProperty(t[i])) {
+            tMap[t[i]]++
+        } else {
+            tMap[t[i]] = 1;
+        }
+    }
+    for(let k in sMap) {
+        if(sMap[k] !== tMap[k]) {
+            return false;
+        }
+    }
+    return true;
 };