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Doom-the-wolf — AS Tutorial - Ch.3 Operators
Published: 2011-06-11 10:14:40 +0000 UTC; Views: 2860; Favourites: 26; Downloads: 202
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Description
Here's the fourth ActionScript tutorial from a long series. This series explains programming to people who have never programmed before. The tutorial will not focus on how to use Flash.Chapter 3: Operators
38 pages.
This chapter will teach you about the operators: Elements that are used to transform data.
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Comments: 9
what do people use bitwise operators for?
It seems overly complicated to me.
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There are reasons, but they aren't particularly important for beginners. You can multiply or divide an integer by 2 using the << and >> operators. It's faster than using the * operator.
Sometimes a programmer uses the 32 bits of an integer as boolean values to save space. So you can use VALUE = A&(1<
You can use bitwise operators to separate color values from a hexadecimal number. Colors in Flash are stored in a hexadecimal number 0xAARRGGBB, where A,R,G and B represent alpha, red, green and blue digits. You can retrieve the alpha by using ALPHA = (COLOR>>24)&0xFF or green by using GREEN = (COLOR>>8)&0xFF.
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It's a way to shorten a commonly used operation. A&=B is the same as writing A=A&B
I believe the & (bitwise and) operator is already explained in this tutorial.
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Begging your pardon, but I think subtract and assign should be [-=] not [+=]. Sorry to nit-pick.
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That's right. I made a mistake when copying the text. I'll fix it now.
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On the 3rd exercise I forgot about 0 being the first number that should be used. Beside that I did pretty well knowledge wise. I just need to remember what operators does what...I guess I should make flash cards or something and just study the hell out of them until I know them by heart. For now I think I will skip the Bitwise stuff until I remember everything else.
Once again thanks for making this.
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The most useful ones are: +,-,* and / for math operations. Then <, ==, != and > for comparing values. Most of these should be familiar from Math class.
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Of course. I kinda want to learn everything though. Don't want to end up writing something complex where there may be a operation that do all of the work for me.
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