Question

I have a NSSet method checking for duplicates and the count of duplicates of each name. I want to place the names in the table view with the number of duplicates with it. I have taken 100 names and return 27 cells after I find duplicates but I can not seem to get the number of duplicates to be placed in the table view with the corresponding names. Here is a screen shot and method I have been trying to work with to get this working.

- (NSSet *)checkForDuplicateIDs {

//CHECK FOR DUPLICATES IN ARRAY
NSArray *allIDs = [tweetArray valueForKeyPath:@"sender_screen_name"];
NSArray *sortedIDs = [allIDs sortedArrayUsingSelector:@selector(compare:)];

NSString *previousID = nil;
duplicateIDs = [NSMutableSet set];
for (NSString *anID in sortedIDs) {
    if ([previousID isEqualToString:anID]) {
        [duplicateIDs addObject:anID];

    }
    previousID = anID;
}


//THEN REMOVE ANY DUPLICATES IN NEW ARRAY
NSCountedSet *countedSet = [NSCountedSet setWithArray:sortedIDs];
NSMutableArray *oneMess = [NSMutableArray arrayWithCapacity:[sortedIDs count]];
NSMutableArray *multipleMess = [NSMutableArray arrayWithCapacity:[sortedIDs count]];


for(id obj in countedSet) {
    if([countedSet countForObject:obj] == 1) {
        [oneMess addObject:obj];
    }
    for(id duplicatenames in countedSet) {
        if ([countedSet countForObject:duplicatenames]>1) {
            [multipleMess addObject:duplicatenames];
            [countedSet  countForObject:duplicatenames];

        }


    }


}


//other method.... much easier and cleaner but how do I put them into an array?
NSCountedSet *set = [[NSCountedSet alloc] initWithArray:allIDs];

for (id item in set)
{
  //  NSLog(@"Name=%@, Count=%lu", item, (unsigned long)[set countForObject:item]);
}    





//  NSLog(@"NSCountedSet ALL Objects = %@",[countedSet allObjects]);
//  NSLog(@"NSCountedSet = %@",countedSet);

[tweetArray removeAllObjects];
[tweetArray addObjectsFromArray:[countedSet allObjects]];
tweetArrayCount = [[NSMutableArray alloc] initWithObjects:countedSet, nil];


//NSLog(@"One Message = %@",oneMess);
// NSLog(@"Multiple Messages = %@",multipleMess);


//HERE I HAVE ORIGINAL ARRAY IN ALBETICAL ORDER
// NSLog(@"Messages Containing more then 1 = %@",sortedIDs);    

//HERE I HAVE DUPLICATES IN ALBETICAL ORDER
// NSLog(@"Messages Containing more then 1 = %@",duplicateIDs);

//HERE I HAVE THE MESSAGES ONLY CONTAING 1
//NSLog(@"Messages Containing only 1 = %@",oneMess);


//NSLog(@"Duplicates count = %i",[duplicateIDs count]);
// NSLog(@"Messages Containing only count = %i",[oneMess count]);



[mainTableView reloadData];


return [[duplicateIDs copy] autorelease];

}

Answer 1

I modified a simple UITableView example that lists country names to do what I think you want to do. The count is put in the detailTextLabel.text.

countedList = [[NSCountedSet alloc] initWithArray:listOfItems];//listOfItems is an array of country name strings with duplicates
    listOfItems2 = [NSMutableArray array]; // array without duplicates that's the data source for the UITableView

    for (NSString *aCountry in countedList) {
        NSMutableDictionary *dict = [NSMutableDictionary dictionary];
        [dict setValue:aCountry forKey:@"name"];
        [dict setValue:[NSString stringWithFormat:@"%lu",[countedList countForObject:aCountry]] forKey:@"count"];
        [listOfItems2 addObject:dict];
    }

And then I used the following method to supply the data for the table:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle: UITableViewCellStyleValue1 reuseIdentifier:CellIdentifier]; //
    }

    // Set up the cell...
    cell.textLabel.text = [[listOfItems2 objectAtIndex:indexPath.row]valueForKey:@"name"];
    cell.detailTextLabel.text = [[listOfItems2 objectAtIndex:indexPath.row]valueForKey:@"count"];
    return cell;
}