ES6 WeakMap example

loiane · loiane · commit 331095647cff · 2016-02-20T09:59:14.000-02:00
diff --git a/chapter07/10-ES6WeakMap.html b/chapter07/10-ES6WeakMap.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title></title>
+</head>
+<body>
+<script src="10-ES6WeakMap.js"></script>
+</body>
+</html>
diff --git a/chapter07/10-ES6WeakMap.js b/chapter07/10-ES6WeakMap.js
@@ -0,0 +1,18 @@
+var map = new WeakMap();
+
+var ob1 = {name:'Gandalf'},
+    ob2 = {name:'John'},
+    ob3 = {name:'Tyrion'};
+
+map.set(ob1, 'gandalf@email.com');
+map.set(ob2, 'johnsnow@email.com');
+map.set(ob3, 'tyrion@email.com');
+
+console.log(map.has(ob1));   //outputs true
+console.log(map.has(ob2));   //outputs true
+console.log(map.has(ob3));   //outputs true
+
+console.log(map.get(ob3)); //outputs tyrion@email.com
+
+map.delete(ob2);
+console.log(map.has(ob2));   //outputs false
