[optymizer]

<sarcasm>Well, if you've never heard of it then it cannot exist and that invalidates his example, right? </sarcasm>

I'm not saying the example is correct, I'm pointing out that "I've never heard of it" / "Works on my computer" are dangerous attitudes to have.

[efnx]

I'm sorry, I should have been more clear. I meant "I've never heard of that method, so I looked it up in Xcode and it turns out it is not a method on NSString (and why should it be if !isEqualToString: achieves the same purpose?) which leads me to believe that this comment is sarcasm, if it isn't can you please clarify?"