Grouping NSArray of NSDictionary based on a key in NSDictionay

Question

I am trying to filter out a NSArray of NSDictionaries. With my below example, I want dict1, dict2 & dict4 grouped in one array, dict3 & dict5 grouped in second array

Answer 1

It's a little hard to tell if what you want is three different arrays where each one only contains entries with a specific Name value (as your first paragraph suggests) or if you want a single array where the entries are sorted by Name (as your second paragraph suggests). Regardless,

To sort orig by the value of the Name field:

NSArray *sortedByName = [orig sortedArrayUsingDescriptors:@[[NSSortDescriptor sortDescriptorWithKey:@"Name" ascending:YES]]];

To get a new array by selecting only entries with a specific value for Name:

NSArray *t1Only = [orig filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"Name = %@", @"T1"]];