List of Figures

Chapter 1. Kotlin: what and why

Figure 1.1. Kotlin build process

Chapter 2. Kotlin basics

Figure 2.1. Kotlin function declaration

Figure 2.2. In Java, the directory hierarchy duplicates the package hierarchy.

Figure 2.3. Your package hierarchy doesn’t need to follow the directory hierarchy.

Figure 2.4. A representation of the expression Sum(Sum-Num(1), Num(2)), Num(4))

Figure 2.5. The IDE highlights smart casts with a background color.

Chapter 3. Defining and calling functions

Figure 3.1. The receiver type is the type on which the extension is defined, and the receiver object is the instance of that type.

Figure 3.2. Extension functions are declared outside of the class.

Figure 3.3. You create a pair using the to function and unpack it with a destructuring declaration.

Figure 3.4. Splitting a path into a directory, a filename, and a file extension by using the substring-BeforeLast and substringAfterLast functions

Figure 3.5. The regular expression for splitting a path into a directory, a filename, and a file extension

Chapter 4. Classes, objects, and interfaces

Figure 4.1. Nested classes don’t reference their outer class, whereas inner classes do.

Figure 4.2. Sealed classes can’t have inheritors defined outside of the class.

Figure 4.3. Using different superclass constructors

Figure 4.4. Delegating to a constructor of the same class

Figure 4.5. Private members can’t be used in top-level functions outside of the class.

Chapter 5. Programming with lambdas