How do I sort an NSMutableArray with custom objects in it?

Question

What I want to do seems pretty simple, but I can\'t find any answers on the web. I have an NSMutableArray of objects, and let\'s say they are \'Person\' objects

Answer 1

I have created a small library of category methods, called Linq to ObjectiveC, that makes this sort of thing more easy. Using the sort method with a key selector, you can sort by birthDate as follows:

NSArray* sortedByBirthDate = [input sort:^id(id person) {
    return [person birthDate];
}]