JavaScript 数组对象深拷贝与浅拷贝

JavaScript   数组对象深拷贝与浅拷贝

1.浅拷贝

var data = ["11","22","33","44"];

var tempData = data;

举例：对tempData删除元素  tempData.splice(0,1),之后data和tempData都是 ["22","33","44"]

1.深拷贝

var data = ["11","22","33","44"];

var tempData = [].concat(data);

举例：对tempData删除元素  tempData.splice(0,1),
 之后data是["11","22","33","44"]
 tempData是["22","33","44"]

 

说明：JavaScript存储对象都是存地址的，所以浅拷贝会导致data和tempData指向同一块内存地址