HashMap objects in javascript

Possible Duplicate:
Loop through JavaScript object
Get array of object's keys

Is there a way to use hashmaps in javascript. I found this page which shows one way of having hashmaps in javascript. Based on that I am storing the data as below:

var map = new Object();
map[myKey1] = myObj1;
map[myKey2] = myObj2;

function get(k) {
   return map[k];
}

But I want the keySet (all the keys) of the map object just like it is done in Java ( map.keySet(); ).

Can anyone show me how can get all the keys present in this object?

---

for (var key in map) {
  if (map.hasOwnProperty(key)) {
    alert(key + " -> " + map[key]);
  }
}

https://stackoverflow.com/a/684692/106261

actually this way is much better :

var keys = Object.keys(map);

---

你可以使用for..in语句：

for (var key  in map) {
    return map[key];
}

---

for(var propertyName in map) {
    // ...
}

链接地址: http://www.djcxy.com/p/28822.html

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