ios - How i know the index of Array object in NSCountedSet -

this code getting duplicate device contacts , want know how index of duplicate contacts

nscountedset *set = [[nscountedset alloc] initwitharray:[contact valueforkey:@"emailaddress"]];  for(id name in set){     if([name isequal:[nsnull null]] || [name isequaltostring:@""]){      } else {         array=[[nsmutablearray alloc]init];         duplicateemaildictionary =[nsmutabledictionary new];         if ([set countforobject:name]>1) {             (int i=0; i<[set countforobject:name]; i++) {                 [array addobject:name];             }             [duplicateemaildictionary setobject:array forkey:@"emailaddress"];             [finalduplicateemail addobject:duplicateemaildictionary];         }     } } 

a set unordered pool of unique objects. since it's unordered, there no integer index can use access specific elements of set.

if need index use nsarray.