NSArray Equivalent of Map

Question

Given an NSArray of NSDictionary objects (containing similar objects and keys) is it possible to write perform a map to an array of specified key?

Answer 1

For Objective-C, I would add the ObjectiveSugar library to this list of answers: https://github.com/supermarin/ObjectiveSugar

Plus, its tagline is "ObjectiveC additions for humans. Ruby style." which should suit OP well ;-)

My most common use-case is mapping an dictionary returned by a server call to an array of simpler objects e.g. getting an NSArray of NSString IDs from your NSDictionary posts:

NSArray *postIds = [results map:^NSString*(NSDictionary* post) {
                       return [post objectForKey:@"post_id"];
                   }];