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Regular expressions are something that were introduced in AS3 with a sigh of relief from all flash developers. Yay
Below is a code snippet posted by senocular at kriupa
function isValidEmail(email:String):Boolean { var emailExpression:RegExp = /^[a-z][\w.-]+@\w[\w.-]+\.[\w.-]*[a-z][a-z]$/i;
return emailExpression.test(email);
}
//...
trace(isValidEmail("senocular@example.com")); // true
trace(isValidEmail("@example.com")); // false
trace(isValidEmail("senocular@example")); // false
trace(isValidEmail("seno\\cular@example.com")); // false
Its a beautiful thing.
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The SimpleButton class is a sweet way to put sprites together to make a button. The SimpleButton is a light weight alternative to the heavier MovieClip object.
var myButton:SimpleButton = new SimpleButton();
myButton.upState = mySprite1;
myButton.overState = mySprite2;
myButton.downState = mySprite3;
myButton.hitAreaState = mySprite4;
You can also draw your sprites on the fly.
var myButton:SimpleButton = new SimpleButton();
//create the look of the states
var down:Sprite = new Sprite();
down.graphics.lineStyle(1, 0x000000);
down.graphics.beginFill(0xFFCC00);
down.graphics.drawRect(10, 10, 100, 30);
var up:Sprite = new Sprite();
up.graphics.lineStyle(1, 0x000000);
up.graphics.beginFill(0x0099FF);
up.graphics.drawRect(10, 10, 100, 30);
var over:Sprite = new Sprite();
over.graphics.lineStyle(1, 0x000000);
over.graphics.beginFill(0x9966FF);
over.graphics.drawRect(10, 10, 100, 30);
// assign the sprites
myButton.upState = up;
myButton.overState = over;
myButton.downState = down;
myButton.hitTestState = up;
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I previous of flash there was no way to detect when the users mouse had left the flash movie.
Actionscript 3 now allows you to detect when the users mouse has left the movie using the mouseLeave event.
Lets take a look:
package {
import flash.events.Event;
import flash.events.MouseEvent;
public class mouseLeaveTest extends Sprite {
public function mouseLeaveTest() {
stage.addEventListener(Event.MOUSE_LEAVE, mouseHasLeft);
}
public function mouseHasLeft)(e:Event):void {
trace('Mouse have left the stage');
}
}
}
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ActionScript 3.0 is a powerful object-oriented language that represents a new programming model for the Flash Player runtime. If you are already familiar with ActionScript 1.0 or 2.0, you should be aware of some language differences as you develop your first application using ActionScript 3.0.
To help the transition adobe has compiled tips and common issues you might encounter during development.
http://www.adobe.com/devnet/actionscript/articles/actionscript_tips.html
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This is a simple but effective function allows you to search a string and replace characters
function searchAndReplace(holder:String, searchfor:String, replacement:String) {
var temparray:Array = new Array();
temparray = holder.split(searchfor);
holder = temparray.join(replacement);
return (holder);
}
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One of the pimping new features of AS3 is the ability to label your loops. At first you may think this is pointless but once you start using them you will find out how wonderful they truly are.
They come into their own when you have nested loop structure and you want to exit loops when a certain condition is met.
Kudos goes to senocular for me finding out about this cool feature.
In AS2 you would do the following to break a loop.
var i:Number;
var j:Number;
var exit:Boolean = false;
for (i=0; i<10; i++) {
for (j=0; j<10; j++) {
if (i > 3 && j > 3) {
exit = true;
break;
}
}
if (exit) {
break;
}
}
But with AS3 and labels you can break from a specific loop.
E.G
var i:Number;
var j:Number;
mainLoop: for (i=0; i<10; i++) {
for (j=0; j<10; j++) {
if (i > 3 && j > 3) {
break mainLoop;
}
}
}
With labels the nested loop is able to break the mainloop. This makes the code cleaner and easier to read.
Nice.
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Returns the number of words in a string.
function wordcount(string:String):Number {
var wrdArray:Array = string.split(" ");
for (var i = wrdArray.length; i>0; i--) {
if (wrdArray[i] == "") {
wrdArray.splice(i,1);
}
}
return wrdArray.length;
}
trace(wordcount("This will count the number of words"));
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A While ago we had an interesting problem with file flash uploaders on Macs. It turns out it doesn’t work. But we have found the way. So here is how we solved the undocumented feature
1. Firstly ensure that you explicitly load the cross domain policy file.
2. Make sure you escape all the characters, Macs hate spaces.
3. And the most important you need to send empty response from upload server-side script.
In php, you would just do
echo (”");
after file-upload code. In ASP, you can do
Response.Write (”").
In Java servlet, you can do:
response.getWriter().println(”");
response.getWriter().flush();
That’s all, now onComplete event should trigger on Mac’s Adobe Flash Player 8.
But if sending “” dosent work try “ “ or “1” – we found that sending 1 was the best option.
Hope this shines some light on a frustrating problem
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Here is how you find all the movieclips inside an object in as3
var desc:XML = describeType(my_mc);
for each (var node:XML in desc.variable) {
if (node.@type == "flash.display::MovieClip") {
if (my_mc.getChildByName(node.@name.toString())) {
trace("child mc found");
}
}
}
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