This chapter builds on the lessons you have been learning about value types, like structs, and references types, like classes. You will explore the differences between the two by comparing their differing behaviors in a variety of scenarios. At the end of this chapter, you should have a good understanding of when to use a value type or a reference type.
Create a new playground called ValueVsRefs. Your playground has the usual template code:
import Cocoa var str = "Hello, playground"
You have seen this code many times before: You have a mutable instance of type String set to the value of
Make a new string by giving the value of str to another instance. ...