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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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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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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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This example shows you how to load and external asset (file) in AS3. The files can be a swf, jpg, gif or png.
This particular example loads a jpg called loademe.jpg and attaches to the stage
Load Asset / external files example
// loadAsset.as
package {
import flash.display.*;
import flash.net.URLRequest;
import flash.net.URLLoader;
import flash.events.*;
public class loadAsset extends Sprite{
private var _loadPath:String
private var _loader:Loader;
// Constructor
public function loadAsset(){
// Create the loader
_loader = new Loader();
// Add event listener that tells us when the
// asset can be safely accessed
_loader.contentLoaderInfo.addEventListener(Event.INIT, displayAsset);
// Create new URLRequest
var urlRequest = new URLRequest("loadme.jpg")
// Start the asset load
_loader.load(urlRequest);
}
// Display the asset once the load is complete
private function displayAsset(ev:Event){
// it to the DisplayObjectContainer
addChild(_loader.content);
}
}
}
To load the asset/file you need to open the flash file and place this AS in the timeline
import loadAsset;
addChild(new loadAsset());
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In AS3 mouse event a handled differently than in AS2. Here is the general procedure for adding a click event to a object.
Full code after the jump.
Mouse Event - click
// you will need a movieclip on the stage with an instance name of cir_mc
// or just download the file above (www.flashcs.org)
cir_mc.addEventListener(MouseEvent.CLICK, clickListner);
function clickListner(ev:MouseEvent):void{
trace("Circle Clicked");
}
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In AS3 mouse event a handled differently than in AS2. Here is the general procedure for adding a mouse over event to a object.
Mouse Event - over
// you will need a movieclip on the stage with an instance name of cir_mc
// or just download the file above (www.flashcs.org)
cir_mc.addEventListener(MouseEvent.MOUSE_OVER, clickListner);
function clickListner(ev:MouseEvent):void{
trace("Mouse Over Circle");
}
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You can place this code in an AS3 document or a custom class, your choice. Thanks to Matt for the snippet Full code after the jump.
AS3 click and drag example
function initDragger(mc:MovieClip):void
{
mc.addEventListener(MouseEvent.MOUSE_DOWN, function (e:MouseEvent):void
{
e.currentTarget.startDrag();
});
mc.addEventListener(MouseEvent.MOUSE_UP, function (e:MouseEvent):void
{
e.currentTarget.stopDrag();
});}
// Set up drag
initDragger(cir_mc);
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I Have just posted up a code snippet that validates general email addresses in AS2. [Update] - Click here for the AS3 Email Validation Code
Full code after the jump.
function validateEmail(emailStr:String) {
var errorCount:Number = 0;
//check to see if there are at least two chars be for the @ symbol
if (emailStr.indexOf("@")<2) {
errorCount++;
}
//check that the @ is not within 2 chars of .
if (emailStr.lastIndexOf(".")<=(emailStr.lastIndexOf("@")+2)) {
errorCount++;
}
//check length eg min aa@bb.cc
if (emailStr.length<8) {
errorCount++;
}
//check there is only one @
if (emailStr.indexOf("@") != emailStr.lastIndexOf("@")) {
errorCount++;
}
// return a T/F to the flash file
if (errorCount == 0) {
return true;
} else {
return false;
}
}
//to use it
if(validateEmail(email.text)){
trace("EMAIL VALID");
}else{
trace("EMAIL NOT VALID")
}
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