Data commit

Task/Associative-array-Creation/JavaScript/associative-array-creation-2.js

@@ -0,0 +1,22 @@
+var map = new Map(),
+    fn = function () {},
+    obj = {};
+
+map.set(fn, 123);
+map.set(obj, 'abc');
+map.set('key', 'val');
+map.set(3, x => x + x);
+
+map.get(fn); //=> 123
+map.get(function () {}); //=> undefined because not the same function
+map.get(obj); //=> 'abc'
+map.get({}); //=> undefined because not the same object
+map.get('key'); //=> 'val'
+map.get(3); //=> (x => x + x)
+
+map.size; //=> 4
+
+//iterating using ES6 for..of syntax
+for (var key of map.keys()) {
+  console.log(key + ' => ' + map.get(key));
+}