Question

i have this code :

NSMutableArray *arr = [NSMutableArray array];
for (int i = 0; i <[titleNews count]; ++i) {
    TFHppleElement *someText =[titleNews objectAtIndex:i];
    NSString *result = [someText content];

    [arr addObject:result];
    if ([[arr objectAtIndex:i]isEqualToString:@"-- : --"]) {
        [arr replaceObjectAtIndex:i withObject:@"x"];
        [arr addObject:@"/"];

    }

    NSLog(@"%@",[arr objectAtIndex:i]);
}

the (replaceObjectAtIndex: withObject:) work fine but the (addObject)method not working

Answer 1

You’re presuming that the “result” that you add to the array will always be at index i. But the first time that you fall into your “if” body, you’ll add an i+1 element (“/”) and from then on everything will be off by one.