I wonder if Objective-C does care about whether I write & or &&? I believe one ampersand (&) would or should cause that if the LEFT side is already false, then the right side won't be evaluated.
Does this apply to Objective-C?
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Yes. The operators function identically in C and Objective-C.
Just like in C (or C++, if you're using Objective-C++) & and | are bit-wise and && and || are logical (and short-circuit). Bit-wise operators (& and |) are not short-circuit.
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1So I just got that the wrong way around. && will not evaluate the right side when the left is already false, but & will evaluate both anyways. correct? – Proud Member Nov 21 '10 at 20:58
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4And && has a boolean result, while & does not. – Wevah Nov 21 '10 at 22:09
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Objective-C uses the C bitwise and logical operators (& is bitwise and && is logical). The single & will evaluate both expressions.
Kevin Sylvestre
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