javascript数组克隆简单实现方法

时间：2021-05-26

本文实例讲述了javascript数组克隆简单实现方法。分享给大家供大家参考，具体如下：

<html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>新建网页 1</title></head><body><script language=javascript>var a = ['a','b','c','d','e','f'];var b = a.concat();b.push('test is ok!');alert(b.join(','));alert(a.join(','));</script></body></html>

小编补充

The JavaScript
To clone the contents of a given array, all you need to do is call slice, providing 0 as the first argument:

var clone = myArray.slice(0);

The code above creates clone of the original array; keep in mind that if objects exist in your array, the references are kept; i.e. the code above does not do a "deep" clone of the array contents. To add clone as a native method to arrays, you'd do something like this:

Array.prototype.clone = function() {
return this.slice(0);
};

And there you have it! Don't iterate over arrays to clone them if all you need is a naive clone!

希望本文所述对大家JavaScript程序设计有所帮助。

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