Here is the first pass at the AS3.0 Cheatsheet. I started by creating one sheet for the language to mirror the AS2.0 sheet. I got one together for the main packages and then realized that there needed to be a series of cheets to cover the massive size of the third version of ActionScript… So here is the Top Level Classes Sheet. The next sheets will be:

Top Level – Error Classes

flash. Packages

flash. Classes

mx. Packages

mx. Classes

Interfaces

That’s a lot of sheets, but the language is growing, quite nicely too I’d have to say

Stay tuned for new AS3.0 sheets to be posted.

 

I was reading a blog the other day and in it the author mentioned the fact that a lot of programmers don’t know how to reverse an array in their language of choice. Not by using a library or language method like we have in ActionScript but the acutal programmatic task of reversing an array.

I have used the handy reverse method in the past but never really thought much about how it acutally worked. Not being a CS major and coming from more of a Multimedia background I thought that this would be something to look into.

Here is the code to do the reverse operation:

function reverse(a) {
// index of leftmost element
var left = 0;
// index of rightmost element
var right = a.length-1;
while (left < right) {
// exchange the left and right elements
var temp = a[left];
a[left] = a[right];
a[right] = temp;
// move the bounds toward the center
left++; right–;
}
}
var example_array = new Array(1,2,3,4,5);
trace(example_array);
reverse(example_array);
trace(example_array);

This is Java code ported to ActionScript the original Java code can be found here:

http://www.leepoint.net/notes-java/data/arrays/34arrayreverse.html

Here is how you use the reverse method in ActionScript if you are looking or wondering: Array.reverse();