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Re: -[NSSet containsObject:] returns NO when it should return YES
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Re: -[NSSet containsObject:] returns NO when it should return YES


  • Subject: Re: -[NSSet containsObject:] returns NO when it should return YES
  • From: Ken Thomases <email@hidden>
  • Date: Sat, 19 Feb 2011 20:31:36 -0600

On Feb 19, 2011, at 4:17 PM, Michael Crawford wrote:

> I also assumed that whether or not the value is signed or unsigned; negative or positive makes no difference as long as calling the same accessor method on both NSNumber instances returns the same result.

I think this is wrong.  I can't imagine why you assumed that some future method call would affect whether two NSNumbers are equal.  They are equal if they contain the same value.  You must realize that, for example, -boolValue would map a great many different NSNumbers to the same return value, but that doesn't imply that the NSNumbers are equal.

Regards,
Ken

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