Javascript reference type

In JS, values, Boolean values, null, and undefined belong to the basic type, while objects, arrays, and functions belong to the reference type.

Two problems to be solved in this blog post are:

• After a references B, the relationship between A and B is: =, =, or other.

• After a references B and B is redirected, A retains the original reference or follows B's new direction.

 
/*** Filename: appointtest. js * Description: This file is used to find out how a appiont work. * Author: Empty hunting deCode* Date: 2012/3/8 */Ext. onready (function () {/*** function for print */var print = console. log; var printall = function (ARR, OBJ) {print ("arr [0] =" + Ext. encode (ARR [0]); print ("OBJ =" + Ext. encode (OBJ); print (ARR [0] = OBJ); print (ARR [0] = OBJ );} /*** Test Data */var OBJ = {Name: 'EMPTY hunting de Code'} var arr = [OBJ]; obj. age = 23; // will this new property be added to Arr? Printall (ARR, OBJ); // redirect OBJ to another object. OBJ = {holobby: 'thinking'} printall (ARR, OBJ); // After redirecting OBJ, does arr [0] Change ?});
 

Running result diagram:

As you can see,The newly added age attribute also affects arr;

HoweverAfter OBJ redirection, arr does not change with OBJ, but points to the original reference.