Part IV. Migration
Part IV distills everything covered in Part I through Part III and applies those skills to the issue of migration—updating legacy projects written in ActionScript 2.0 to shiny new ActionScript 3.0 code.
You’ll start by walking through a sample migration of a particle system. The chapter highlights as many migration issues as possible in a simple example, and you’ll acquire some practical experience with the various steps required to modernize your code. You’ll start to address the important question: should I migrate or rewrite? The answer’s not always simple.
The final chapter concludes the book with a dual-purpose cross-reference and code-comparison chapter. Specific migration issues are demonstrated in quick syntax examples, comparing ActionScript 2.0 and 3.0 uses. Where applicable, references to more complete discussions elsewhere in the book are included. Select new material in the same comparative format rounds out the book.
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