fixed code

Author: loiane

chapter06/01-Set.js

@@ -50,7 +50,8 @@ function Set() {
     this.sizeLegacy = function(){
         var count = 0;
         for(var prop in items) {
-            ++count;
+            if(items.hasOwnProperty(prop))
+                ++count;
         }
         return count;
     };

chapter07/01-Dictionaries.js

@@ -15,7 +15,8 @@ function Dictionary(){
     };
 
     this.has = function(key){
-        return key in items;
+        return items.hasOwnProperty(value);
+        //return value in items;
     };
 
     this.get = function(key) {