Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text as are shown as follows: "AbstractExpression: It defines an interpret() method that is common to all node in the abstract syntax tree."

A block of code is set as follows:

class WalkMoveStrategy:IMoveStrategy{
  func performMove() {
    print("I am walking")
  }
}

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

class WalkMoveStrategy:IMoveStrategy{
  func performMove() {
 print("I am walking")
  }
}

Any console output is written as follows:

Printing checkPoint....
Level: 0 Weapon: gun Points: 1200 
Level: 1 Weapon: tommy gun Points: 2250 
Level: 2 Weapon: bazooka Points: 2400 
Level: 4 Weapon: knife Points: 3000 
Total Points: 8850

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "Click on the Show the Test navigator button on the left-hand side."