stringwithformat issue in string searching

Question

I did following experiment. Can any one point out why strings initialized with stringwithformat fail in string searching?

    NSString *test1 = @"Hello";
    NSString *test2 = @"Hello";
    NSString *test3 = [NSString stringWithFormat:@"%@ ", test2];

   NSRange titleResultsRange = [test1 rangeOfString:test2 options:NSCaseInsensitiveSearch];

I get titleResultsRange.length > 0

But when I do -

NSRange titleResultsRange = [test1 rangeOfString:test3 options:NSCaseInsensitiveSearch];

I get titleResultsRange.length = 0

Why?

Yes, even then NSRange.length should be greater than 0. As there is a substring match. Do you get the same result? — user1041086, Nov 12 '11 at 02:30
There is no match since `test3` is not a substring of `test1` because, as I said earlier, `test3` has an extra white space. Maybe you’re confusing the receiver and the argument. — , Nov 12 '11 at 02:55

score 1 · Answer 1 · answered Nov 11 '11 at 05:28

1

Could it be that test3 is "Hello " not "Hello".

answered Nov 11 '11 at 05:28

Jim Rhodes

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score 0 · Answer 2 · answered Nov 11 '11 at 05:42

NSString *test1 = @"Hello";
NSString *test2 = @"Hello";
NSString *test3 = [NSString stringWithFormat:@"%@", test2];
NSRange titleResultsRange = [test1 rangeOfString:test2 options:NSCaseInsensitiveSearch];

Try now. In your code test3 string contain extra white space.

stringwithformat issue in string searching

2 Answers2