Palindrome String problem

Question

Matteo Gobbi · Accepted Answer

Assumed in a NSString category:
-------------

- (BOOL)isPalindrome
{
    NSUInteger i = 0, o = self.length;
    while (i < o) {
        if ([self characterAtIndex:i] != [self characterAtIndex:o]) {
            return NO;
        }
        
        ++i;
        --o;
    }

    return YES;
}

Anonymous · Answer

Swift 
func isPalindrone(testString: String) -> Bool {
    
    var testString = testString
    
    while testString.characters.count > 1 {
        if testString.characters.popFirst() != testString.characters.popLast() {
            return false
        }
    }

    return true
}

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