<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>
脚本之家小编补充
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!