Chapter 12: Managing Data and Memory in Cocoa
In This Chapter
Introducing data collection objects
Using NSCoder and NSData
Archiving and de-archiving object properties
Cocoa includes unique data collection objects, which are used almost as regularly as floats, ints, and character strings are in C and Java. You can use these objects as custom object stores, but you'll also spend time packing data into a collection and passing it to a Cocoa class, and unpacking data from a collection returned by a Cocoa class.
Cocoa doesn't always use data collections efficiently. Certain classes force you to pack data into an array or dictionary when you want to pass a single string or a number. This adds overhead and complicates the code, but it is sometimes obligatory.
Basic data collection skills include:
Understanding the difference between mutable and standard classes.
Understanding the difference between arrays, sets, dictionaries, and byte data.
Finding objects ...