开发者

Is there a way to customize/override assignment operations in JavasScript?

Every time I assign a string, I'd actually like to assign a string object, without the extra code.

This var foo = "bar";

becomes var foo = new String("bar");

Basically hi-jacking the assignment.


Follow-up:

If the above is not possible is there a way to prototype the string variable type, rather than the String object?

As pointed out by armando, the foo would be a string type, but is essentially a customized array. It would be nice to be able to protot开发者_如何转开发ype functions to that class.


  1. No this is not possible
  2. If it was possible, you really would not want to do this, at least not globally.

  • The string variable type does not have all the extra overhead that an object does.
    Note: the string array that is created (in your case, foo) would have other properties (eg foo.length)
  • Objects come at a performance hit


It's not quite what you're looking for, but you may want to look at Overriding assignment operator in JS

0

上一篇:

下一篇:

精彩评论

暂无评论...
验证码 换一张
取 消

最新问答

问答排行榜