Archive for July, 2009

Pointless Code

We’ve all seen it, perhaps even in our own code. It’s something I think we do because we’re not really sure what would happen if we didn’t do it. Here are some little tidbits of pointless code I’ve been seeing recently:

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Nested Functions and Function Variables

Turns out that AS3 supports ! I have been making Function variables for a long time. Read on for the greatness that is nested functions.

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Flexible Loop Syntax

First things first: this might be a bug in MXMLC. It sure did cause a bug in my program though! Read on for the stupid mistake that had me scratching my head.

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Dictionary Conversion

Dictionaries are very useful. Unlike Objects, your keys don’t need to be Strings. But there are remnants of this String requirement that are not obvious. Fortunately, it’s a simple rule to remember…

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Converting Vectors to Arrays

Vectors– typed arrays in AS3– are much quicker than arrays and therefore very useful. There are many times where you end up with arrays though and need to convert them into vectors for the bulk of your using that data. This article is about that process.

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Variable Clashes

Scoping is pretty weird in AS3 for those coming from C/C++ and Java. There are two cases in particular you should know about.

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Fun With Dynamic Functions

Dynamic functions are a very useful feature of AS3 and JavaScript. Closures constantly come in handy for cleaner, more powerful code. Here’s a feature you might not know about them though.

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Abstract Classes

Abstract classes are an explicit language feature of Java via the abstract keyword. In C++ they are less explicit via pure virtual functions. In AS3 they are only enforceable at runtime. There are many ways to go about creating abstract classes. This article shows you some of the ways.

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Super Is (Really) Optional!

Like Java, AS3 has a super() function you can call from your constructor to call your parent class’ constructor. As it turns out, this is more optional than you might think.

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Loop Safety

This is a curiosity I’ve had for far too long. Why didn’t I make these simple tests years ago when I was first learning AS3? I’m not sure, but judging by a lot of other people’s AS3 that I’ve read, many people don’t seem to understand it.

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