Analysis of jQuery's $.extend shallow copy and deep copy examples

What are jQuery's $.extend shallow copy and deep copy? This article mainly introduces the relevant information of jQuery's $.extend shallow copy and deep copy. Friends who need it can refer to it. I hope it can help everyone.

jQuery’s $.extend shallow copy and deep copy

$.extend( [deep ], target, object1 [, objectN ] )；
 deep 
类型: Boolean 
如果是true，合并成为递归（又叫做深拷贝）。
 target 
类型: Object 
对象扩展。这将接收新的属性。
 object1 
类型: Object 
一个对象，它包含额外的属性合并到第一个参数。
objectN 
类型: Object 
包含额外的属性合并到第一个参数。

$.extend shallow copy:

var obj1 = {name:xx,age:18,sex:man};
var obj2 = {name:cc,age:18};
$.extend(obj1,obj2);
obj1----->{name:cc,age:18} //被obj2覆盖

$.extend deep copy:

##

var obj1 = {name:xx,age:18,sex:man};
var obj2 = {name:cc,age:18};
$.extend(true,obj1,obj2);
obj1----->{name:cc,age:18，sex:man}

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