December 2013
Intermediate to advanced
132 pages
1h 58m
English
Content preview from Objective-C Quick Syntax ReferenceBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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CHAPTER 8
Arrays
NSArray
NSArray is a class used to organize objects in lists. NSArray can maintain an index of objects, search for objects, and enumerate through the list. Enumeration is the process of moving through a list one item at a time and performing an action on each item in the list.
To create an array, you include a comma-separate list of objects enclosed in square brackets and started with the @ symbol.
NSArray *numbers = @[@-2, @-1, @0, @1, @2];NSArray *letters = @[@"A", @"B", @"C", @"D", @"E", @"F"];
The NSArray object numbers has a list of NSNumber objects, while letters has a list of strings. Any object can be put into an NSArray ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.