Autorelease object returned from NSArray?

I'm writing an NSArray category to include the -objectAtRandom message that returns an object from a random index (something similar to Python's choice).

Should I autorelease this object befo开发者_如何学Gore returning it? I believe I shouldn't, but I'm not sure...

According to the normal memory management rules, no, you should not. Since you're presumably using objectAtIndex: to return the object, you don't need to do any memory mangement of your own.

I'd write return [[object retain] autorelease] - this will guarantee, that even if array will be released, user will be able to work with object until current runloop cycle finish.