Quicker if-statement: if `variable` is “value” or “value”

Question

How can you compare against multiple possibilities in one argument?

Example:

if ((integer == 2) || (integer == 5))

if ((string == \"hello\") || (str         


        

Answer 1

If you wanted to do this with an object type, like say NSString, and you feel comfortable with categories, you could do add a category method:

@implementation NSObject (IsEqualMultiple)

- (BOOL)isEqualTo:(id)obj1 or:(id)obj2 
{
    return [self isEqual:obj1] || [self isEqual:obj2];
}

@end

Then you could use it like this:

if ([string isEqualTo:@"hello" or:@"dolly"])