OR function in Objective-C

Question

is there an OR function in Objective-C?

for example:

if(string1 == string2 || string3 == string 4)

|| doesnt seems to work.

Thanks.

Do you get an error? What is it? `||` is a perfectly valid operator in Objective C. You can't compare strings with `==` though. See: http://stackoverflow.com/questions/1302985/how-do-i-compare-strings-in-objective-c — Chinmay Kanchi, Aug 22 '10 at 17:13

score 4 · Accepted Answer · edited Aug 22 '10 at 17:21

4

|| is a valid Objectivc-C and C Operator. It should work.

Try is code:

if([string1 isEqualToString:string2] || [string3 isEqualToString:string4]) 
{
}

edited Aug 22 '10 at 17:21

Federico klez Culloca

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answered Aug 22 '10 at 17:13

Henrik P. Hessel

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sorry for editing but naming a string `string` could have been misleading :-) – Federico klez Culloca Aug 22 '10 at 17:21

score 1 · Answer 2 · answered Aug 22 '10 at 17:13

1

The or-operator || works fine, but the == operator doesn't work for C-strings nor for NSString if you want to test for string-equality. As written you only test for the pointers being equal.

Instead use:

strcmp() for C-style strings
-isEqualToString: for NSString

answered Aug 22 '10 at 17:13

Georg Fritzsche

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The only issue here is strcmp will return 0 if the strings are equal, you'd have to invert the checks. – Joshua Weinberg Aug 22 '10 at 17:29
No reason to be using strcmp anyway. – ZaBlanc Aug 23 '10 at 15:48
@ZaBlanc: Could you be more specific? – Georg Fritzsche Aug 23 '10 at 18:55

OR function in Objective-C

2 Answers2