Often, you'll write code like:

NSMutableArray* names = [NSMutableArray array];
for (SomeObject* each in someArray) {
    [names addObject:each.someNameProperty];
}

You can shorten it to:

NSArray* names = [someArray valueForKey:@"someNameProperty"];

Your feedback is valuable: Do you want more nuggets like this?   Yes   or   No