Implicit Cast to Bool

gistfile1.m

        // Just a string
        NSString *string = @"Trololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololololol";
       
        // Not so clever implicit BOOL cast
        BOOL hasText = [string length]; // Just add "> 0" to fix it btw.
        
        // Sure it has some text! ... eh wait what
        NSLog(@"String has some text: %@", hasText ? @"YES" : @"NO");

        // And to have some reference to the blog post ... (http://blog.bignerdranch.com/564-bools-sharp-corners/)
        if ([string length] == YES) {
            NSLog(@"String has some text!");
        } else {
            NSLog(@"String is empty!");
        }