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Comment by naz | Hacker News Reader

   NSString *myString = @"This is a" @" string.";

Adjacent string constants are concatenated by the preprocessor. Otherwise, I don't think it's too much hassle to call stringByAppendingString:.

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True, but adjacent string constants is a totally insane use case that essentially doesn't ever happen. I think the poster was talking about the far more common case of concatenating string variables:

    NSString *foo = @"Hello, " + userName + @"! (^_^)";

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