NSCountedSet (grouping array objects with their total number of counts)

This class gives the count of an object present in an array. 

For example: If we have an array named myArray with objects: (AA,HH,TT,SS,AA,KK,TT,TT,XX,HH,HH,HH,SS,SS)

 Then to get total no of count of every object only write this code:

 NSCountedSet * set = [[NSCountedSet alloc] initWithArray: myArray];

for (id obj in set) {

NSLog(@"%d - %@", [set countForObject:obj], obj);

 }

 Now you can use this [set countForObject:obj] and obj according to your requirement.

 For example it you want to display this in a table with non-repeated objects and with count you can assign above value in a dictionary like this:

 NSMutableDictionary *dirCount = [[NSMutableDictionary alloc]init];

 NSCountedSet * set = [[NSCountedSet alloc] initWithArray:arrForTypeGroup];

 for (id obj in set) {

 NSLog(@"%d - %@", [set countForObject:obj], obj);

 [dirCount setObject:[NSNumber numberWithInt:[set countForObject:obj]] forKey:obj];

 }

 NSLog(@"Output: %@", dirCount);

 Now use this dictionary to display in table.

-parag kavar .