ios - Group and count NSArray Objects -


i have nsarray of objects. each object has following properties/attributes name,id,type. name , id dependent . i.e. if id 12345 , id aaaa object id 12345 name aaaa.

what have particular type bedtype. want consider objects of bedtype , group them id , count how many objects belong each group. want output name , count each group.

you fx create dictionary keys names , values counts of objects. can iterate on array , 

nsmutabledictionary *countsbyname = [@{} mutablecopy];  for(object *object in myobjectarray){      nsnumber *count = countsbyname[object.name]     if(count)         countsbyname[object.name] = @([count intvalue] + 1);     else countsbyname[object.name] = @1; }

you need make sure consider object type bedtype.


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