Question

I have a simple questionnaire app that uses tableview. When users answers questions they have option to step back and change the selection they made. That causes doubling answers in results (the selections are stored in NSmutableArray) How to escape storing “double” results in the array?

Answer 1

NSMutableArray *add= [[NSMutableArray alloc]init];

for (Item *item in addList){
        if ([add containsObject:item])
        { // Do not add
        }
        else
            [add addObject:item];
}

Here addList is list of objects