Download Adobe Flex 2 - Programming ActionScript 3.0 PDF

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71 Operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 Conditionals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 Looping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 language—they are its fundamental building blocks.

Function localScope() { var strLocal:String = "local"; } localScope(); trace (strLocal); // error because strLocal is not defined globally If the variable name you use for your local variable is already declared as a global variable, the local definition hides (or shadows) the global definition while the local variable is in scope. The global variable will still exist outside of the function. For example, the following code creates a global string variable named str1, and then creates a local variable of the same name inside the scopeTest() function.

Once you open a namespace with use namespace, it remains open throughout the block of code in which it was opened. There is no way to explicitly close a namespace. Having more than one open namespace, however, increases the likelihood of name conflicts. If you prefer not to open a namespace, you can avoid the use namespace directive by qualifying the method or property name with the namespace and the name qualifier punctuator. Proxy class that is part of the Flash Player API. 0, allows you to intercept references to undefined properties or methods before an error occurs.

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