3 Actionscript You Need to Know

In Chapter 1, “Building Flex Applications,” I say that ActionScript provides the brains or logic in a Flex program. ActionScript is an object-oriented programming language used by Flash applications (whether developed using Flex, Flash Professional, or Flash Catalyst). Like JavaScript, ActionScript is derived from something called ECMAScript, although ActionScript does a few things differently.

In this chapter, I’ll walk you through the ActionScript you need to know in order to develop real-world Flex applications today. Entire books are written on Action-Script, so I obviously can’t go into all of the details of the language. But the chapter does cover the fundamentals and should be approachable even if you’ve ...

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