$.extend erratic behavior with objects that have a length property

[dmethvin]

From the jQuery Google Group: ​http://groups.google.com/group/jquery-en/browse_frm/thread/31e97b11082d2633#

Hello,

It seems that it's not safe to use "length" as a nested object property if I want to use jquery.extend. Is this a know issue?

$.extend(true, {},{"prop":{"length":"-1"}});

thanks,

-Morgan

[JDay]

Fix and testcase. Use jQuery.isArray() istead of checking for a length property.

[dmethvin]

That would only handle true Array objects. I think the goal may have been to have $.extend be able to take array-like objects and treat them like Array, e.g., Function.arguments and DOM nodeList. It's worth thinking about so I'll leave the ticket open for further discussion.

[JDay]

"Array-like" objects can still be handled and should work as before. Where is the value in making a "true" Array out of an object that wasn't an array to begin with?

[Rick Waldron]

Additional testing:

​http://jsfiddle.net/rwaldron/nqnBr/2/

I don't think there is any misbehaviour here. I'm closing, if the author wants to reopen, then we can do so with valid reason.