How to encode key / value object in javascript

Question

var user = {};

Now I want to create a setUsers method that takes an object of a key / value pair and initializes the user variable.

 setUsers = function(data) { // loop and init user } 

where data:

 234: "john", 23421: "smith", .... 

Answer 1

Beware of properties inherited from the prototype of the object (this can happen if you include any libraries on your page, for example, older versions of Prototype). You can verify this using the hasOwnProperty() object method. This is usually a good idea when using for...in loops:

 var user = {}; function setUsers(data) { for (var k in data) { if (data.hasOwnProperty(k)) { user[k] = data[k]; } } } 

Answer 2

 for (var key in data) { alert("User " + data[key] + " is #" + key); // "User john is #234" } 

Answer 3

Something like that:

 setUsers = function (data) { for (k in data) { user[k] = data[k]; } }