Remove Duplicate Values from NSMutableArray iPhone

Remove Duplicate Values from NSMutableArray iPhone

NSArray *copy = [mutableArray copy];

NSInteger index = [copy count] - 1;

for (id object in [copy reverseObjectEnumerator]) {

    if ([mutableArray indexOfObject:object inRange:NSMakeRange(0, index)] != NSNotFound) {

        [mutableArray removeObjectAtIndex:index];

    }

    index--;

}

[copy release];