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Re: Differences between -isEqual: and -isEqualTo:?

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Re: Differences between -isEqual: and -isEqualTo:?

Subject: Re: Differences between -isEqual: and -isEqualTo:?
From: Dave DeLong <email@hidden>
Date: Thu, 18 Sep 2008 15:59:31 -0600

IIRC, isEqual: compares memory addresses, whereas isEqualTo: compares hashes of the objects being compared. I also believe that isEqual: is the preferred method.

Cheers,

Dave

On Sep 18, 2008, at 3:57 PM, Rick Mann wrote:

I see that NSObject (and its protocol) define -isEqual: and - isEqualTo:. What's the difference? Why does something like NSArray's -indexOfObject: use -isEqual: and not -isEqualTo:? So that someone can redefine these for an existing class? Why does -isEqualTo: even exist?
--
Rick

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