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  • Book Overview & Buying haXe 2 Beginner's Guide
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haXe 2 Beginner's Guide

haXe 2 Beginner's Guide

By : Benjamin Dasnois
3.5 (2)
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haXe 2 Beginner's Guide

haXe 2 Beginner's Guide

3.5 (2)
By: Benjamin Dasnois
Buy this Book

Overview of this book

This book is part of the Packt Beginner's Guide series. Written in an engaging style, it offers step-by-step examples with screenshots at key steps and clear explanation of what is happening in each task. This book is written for both Beginners and Developers who want to learn this multi-platform programming language to build web applications from scratch.
Table of Contents (21 chapters)
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haxe 2
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haxe 2
Credits
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Credits
Foreword
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Foreword
About the Author
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About the Author
About the Reviewers
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About the Reviewers
www.PacktPub.com
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www.PacktPub.com
Preface
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Preface
Lock Free Chapter
1
Getting to know haXe
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Getting to know haXe
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Installing haXe
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Choosing an editor
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Writing your first program
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Time for action – Writing a Hello World
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A program with some interaction
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Time for action – Interacting with the user
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Summary
2
Basic Syntax and Branching
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Basic Syntax and Branching
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Modules, packages, and classes
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Constants and its types
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Binary and unary operators
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Blocks
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Variable declaration and scope
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Time for action – Declaring some fields
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Field access and function calls
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Constructing class instance
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Conditional branching
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Loops
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Break and continue
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Time for action – Using the break keyword
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Time for action – Using the continue keyword
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Return
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Exception handling
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Anonymous objects
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Local functions
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Managing a fridge
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Time for action – Managing a fridge
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Summary
3
Being Cross-platform with haXe
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Being Cross-platform with haXe
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What is cross-platform in the library
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Platform-specific packages
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Conditional compilation
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The remap switch
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Coding cross-platform using imports
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Time for action – Welcoming the user on Neko & PHP
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Time for action – Reading from the XML file
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Time for action – Writing to an XML file
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Testing our sample
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Making it cross-platform
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Summary
4
Understanding Types
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Understanding Types
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Explicitly typed variables
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Static typing
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Values with several types
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Representing a blog article
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Time for action – Representing different types of articles
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Function's type
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Anonymous objects
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Creating a function to apply another one
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Time for action – Applying a function on every item
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Type inference
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Casting
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Type parameters
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Extending the fridge
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Time for action – A fridge with constraints
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Summary
5
The Dynamic Type and Properties
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The Dynamic Type and Properties
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Freeing yourself from the typing system
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Time for action – Assigning to Dynamic variables
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Time for action – Assigning from Dynamic variables
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Parameterized Dynamic class
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Classes implementing Dynamic
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Time for action – Implementing a non-parameterized Dynamic
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Time for action – Implementing a parameterized Dynamic
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Using a resolve function when implementing Dynamic
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Time for action – Writing our Component class
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Time for action – Parsing the configuration file
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Time for action – Testing our parser
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Time for action – Writing the configuration file
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Time for action – Testing the writer
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The dot-notation
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Thoughts on writing our parser
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The dynamic keyword
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Warning
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Properties in classes
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Summary
6
Using and Writing Interfaces, Typedefs, and Enums
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Using and Writing Interfaces, Typedefs, and Enums
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Interfaces
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Typedefs
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Time for action – Naming Anonymous Types
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Enums
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Time for action – Switching over enums with parameters
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Time for action – Writing our Fridge class
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Time for action – Making it possible to iterate over a fridge
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Time for action – Creating the iterator
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Our main function
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Summary
7
Communication Between haXe Programs
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Communication Between haXe Programs
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The haXe serializer
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haXe remoting
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Time for action – Writing a zoo management tool
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The Animal class
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Representing the zoo
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Time for action – Saving the list
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Time for action – Loading the list
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The remoting service
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The client
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Time for action – Initializing the client connection
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Summary
8
Accessing Databases
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Accessing Databases
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Connecting to databases
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The SPOD
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A concrete example of SPOD use
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The Manager
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Handling relations
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Creating a blogging system
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Time for action – Creating the Users table
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Time for action – Creating the User class
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Time for action – Creating the Posts table
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Time for action – Creating the Post class
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Time for action – Creating the connection to the database
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Time for action – Listing posts
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Time for action – Listing users
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Time for action – Adding a user
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Time for action – Adding a post
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Time for action – Branching it with the main function
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Summary
9
Templating
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Templating
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Introduction to the haxe.Template class
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Time for action – Executing code from a template
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Integrating subtemplates
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Creating a blog's front page
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Time for action – Creating our SPOD class
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Time for action – Connecting to the database
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Time for action – Creating our template
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Time for action – Reading the template from resources
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Time for action – Executing the template
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Time for action – Testing the result
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Summary
10
Interfacing with the Target Platform
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Interfacing with the Target Platform
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Extern classes
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Time for action – Writing an extern
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Native types and haXe types
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Magic functions
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Summary
11
A Dynamic Website Using JavaScript
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A Dynamic Website Using JavaScript
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Manipulating the DOM
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Time for action – Using events from the DOM level 0
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Time for action – Using DOM level 2 events
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Time for action – Working around by storing reference to functions
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Time for action – Setting up the model
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Time for action – Setting up our view
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Time for action – Setting up the controller
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Time for action – Creating a computer view
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The main class
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Summary
12
Creating a Game with haXe and Flash
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Creating a Game with haXe and Flash
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Embedding assets
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Time for action – Installing SWFMILL
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Time for action – Creating a library
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Time for action – Using assets
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Event handling
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Time for action – Drawing the character
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Time for action – Handling moves
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Time for action – Moving the character
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Time for action – Adding balls
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Time for action – Updating the position
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Time for action – Detecting collisions
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Summary
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Pop Quiz Answers
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Pop Quiz Answers
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Chapter 1: Getting to know haXe
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Chapter 3: Being Cross-platform with haXe
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Chapter 4: Understanding Types
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Chapter 5: The Dynamic Type and Properties
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Chapter 6: Using and Writing Interfaces, Typedefs, and Enums
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Chapter 7: Communication Between haXe Programs
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Chapter 8: Accessing Databases
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Chapter 9: Templating
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Chapter 10: Interfacing with the Target Platform
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Chapter 12: Creating a Game with haXe and Flash
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Index
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Index

Type inference

Type inference is the opposite of explicitly declaring the type of a variable. When using type inference, you simply omit the part telling the type of your variable and let the compiler guess it.

There are several ways for the compiler to guess the type of your variables. Let's see some of them!

Assigning a value

When you assign a value to a variable that still has an unknown type, its type will be inferred as being the one of the assigned value, so for example, if you write:

var s;s = "Hello World";

The type of s will be inferred to String.

Assigning the value of the variable to another one

In addition, if you assign the value of a variable that still has an unknown type to a variable that is of a known type, the type will also be inferred:

      var s;
      var t : String;
      t = s;

Here, the type of s is inferred to String.

Passing the variable as a parameter

When you pass a variable to a function, its type is inferred as being the one expected by the function. For example, consider...

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