How to use the function of bind

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The usage of  bind  is to define a specified scope for called function. Because the key this is easy to refer another objet, experically window, instead of itself. Please pay attention to look at the following example:

 1 //Global variables
 2 window.name="Chromium";
 3 
 4 var person={
 5   name:"Pin"
 6 }
 7 
 8 function say()
 9 {
10    alert("My name is "+this.name+"!");
11 }
12 
13 say(); //the result is : My name is Chromium!
14 
15 var sayfunction=say.bind(person);
16 
17 sayfunction(); //the result is : My name is Pin!

When the function say assign to a variable sayfunction, the scope of this function has been changed. However, if you use the function of bind  to refer a specified object person, the scope will own the refer object person.

How to use the function of bind,布布扣,bubuko.com

How to use the function of bind

标签：c   style   class   blog   code   java   

原文地址：http://www.cnblogs.com/pinxiong/p/3774910.html