I have an ArrayCollection of a list of usernames and user id's. In this list there are duplicates that I need to remove. I've searched the internet and while there are a lot of example of this using Arrays, I can't find any clear examples using ArrayCollection's.
The should be simpler then the other solution.
function removeDuplicatesInArray(val:*, index:uint, array:Array):Boolean {
return array.indexOf(val) == array.lastIndexOf(val);
}
function removeDuplicatesInCollection(collection:ArrayCollection):ArrayCollection {
collection.source = collection.source.filter(removeDuplicatesInArray);
return collection;
}
Here's what I found after quick googling.
//takes an AC and the filters out all duplicate entries
public function getUniqueValues (collection : ArrayCollection) : ArrayCollection {
var length : Number = collection.length;
var dic : Dictionary = new Dictionary();
//this should be whatever type of object you have inside your AC
var value : Object;
for(var i : int= 0; i < length; i++){
value = collection.getItemAt(i);
dic[value] = value;
}
//this bit goes through the dictionary and puts data into a new AC
var unique = new ArrayCollection();
for(var prop:String in dic){
unique.addItem(dic[prop]);
}
return unique;
}
If you find solutions for the array you can do the same with the ArrayCollection. You can change arrayCollection.source and arrayCollection will be changed too. In general, we can assume that ArrayCollection is wrapper for Array.
Array contain a filter function and we can make use of it as following.
var ar:Array = ["Joe","Bob","Curl","Curl"];
var distinctData = ar.filter(function(itm, i){
return ar.indexOf(itm)== i;
});
Alert.show(distinctData.join(","));
Or better yet
Array.prototype.distinct = function():*
{
var arr:Array = this as Array;
return arr.filter(function(itm, i){
return (this as Array).indexOf(itm)== i;
},arr);
};
var ar:Array = ["Joe","Bob","Curl","Curl"];
Alert.show(ar.distinct());
function removeDuplicateElement(_arr:Array):Array{
//set new Dictionary
var lDic:Dictionary = new Dictionary();
for each(var thisElement:* in _arr){
//All values of duplicate entries will be overwritten
lDic[thisElement] = true;
}
_arr = [];
for(var lKey:* in lDic){
_arr.push(lKey);
}
return _arr;
}
Related
I have problems joining two scripts into one.
This is main part of the script: AS3.
And this is already joined script.
And here is part of the code that I need to import (AS2) :
stop();
var banners:Array = new Array();
var imagePaths:Array = new Array();
var links:Array = new Array();
var bodyTexts:Array = new Array();
var imageTime:Number;
var numberOfBanners:Number;
var isRandom:String;
var showHeader:String;
var bannersXML:XML = new XML();
bannersXML.ignoreWhite = true;
bannersXML.load("banners.xml");
bannersXML.onLoad = function(success) {
if (success) {
trace("XML LOADED");
imageTime = parseInt(this.firstChild.firstChild.firstChild)*1000;
numberOfBanners = parseInt(this.firstChild.childNodes[1].firstChild);
isRandom = this.firstChild.attributes["isRandom"];
showHeader = this.firstChild.childNodes[2].attributes["showHeader"];
var bannerSequence:Array = new Array();
if (isRandom == "true") {
//Make a random sequence
while (bannerSequence.length<numberOfBanners) {
newRandomNumber = random(numberOfBanners);
//Make sure that the random one chosen is not already chosen
for (var i = 0; i<=bannerSequence.length; i++) {
if (newRandomNumber != bannerSequence[i]) {
alreadyThere = false;
} else {
alreadyThere = true;
break;
}
}
//Add only random values that aren't in the array
if (!alreadyThere) {
bannerSequence.push(newRandomNumber);
}
}
} else {
for (var i = 0; i<numberOfBanners; i++) {
bannerSequence.push(i);
}
}
}
//Read XML in the Random Order Chosen
for (var i = 0; i<numberOfBanners; i++) {
banners.push(this.firstChild.childNodes[2].childNodes[bannerSequence[i]].firstChild.firstChild.toString());
bodyTexts.push(this.firstChild.childNodes[2].childNodes[bannerSequence[i]].childNodes[1].firstChild.nodeValue);
imagePaths.push(this.firstChild.childNodes[2].childNodes[bannerSequence[i]].childNodes[2].firstChild.nodeValue);
links.push(this.firstChild.childNodes[2].childNodes[bannerSequence[i]].childNodes[3].firstChild.nodeValue);
}
play();
};
//Start the image counter at 0
var imageCounter = 0;
I get erorr in this part of the code
function doRandArray(a:Array):Array {//make random array
var nLen:Number = a.length;
var aRand:Array = a.slice();
var nRand:Number;
var oTemp:Object;
for (var i:Number = 0; i < nLen; i++) {
oTemp = aRand[i];
nRand = i + (random(nLen – i));
aRand[i] = aRand[nRand];
aRand[nRand] = oTemp;
}
return aRand;
}
When I run it, I get an error in this place:
nRand = i + (random(nLen – i));
Scene 1, Layer 'Layer 1', Frame 1, Line 265 1084: Syntax error: expecting rightparen before i.
as2 random(random(nLen – i)); is generate 0,1,...nLen-i-1. not floating only int value.
correct as3 code is int(Math.random()*(nLen-i)); or Math.floor(Math.random()*(nLen-i));
as2: random()
as3: Math.random()
In ActionScript 3 the random function is a little bit different from what it was in as2 code, just change the offending line to:
nRand = i + Math.random()*(nLen-1);
This should fix all errors and work just the same.
EDIT: as #bitmapdata.com indicated, for this to run the same as in as2 the random value must be truncated (stripped of its decimal values). Besides the couple of possibilities he suggested, I would personally just change nRand's type to uint on declaration:
var nRand:uint;
You can also change the iterator type to var i:uint. Less memory usage is always good ;)
I am trying to create a vector from unknown class, but it fails, any ideas about how to do it?
This is what i tried:
var vector:Vector = new Vector(); // throw exception
function base():void{
var vector:Vector.<String> = createVector(String);// throw classCastException
}
function createVector(cls:Class):*{
var array:Array = new Array();
for(var i:int = 0; i < 10; i++){
var element:cls = new cls();
array.push(element);
}
return Vector(array);
}
Vector is expecting a parameter type so you can't do this like you want, but using getQualifiedClassName to get class info you can construct a string that will enable you to call the Vector. constructor using getDefinitionByName :
Ex.
// get class parameter name
var className:String=getQualifiedClassName(String);
// get the Vector class object for the given class
var o:Object=getDefinitionByName("__AS3__.vec::Vector<"+className+">");
// call the constructor
var v:*=o.prototype.constructor(["hello", "world"]);
So your function can be written as:
public function createVector(cls:Class):*{
var cn:String = getQualifiedClassName(cls);
var o:Object = getDefinitionByName("__AS3__.vec::Vector.<"+cn+">");
var array:Array = [];
for(var i:int = 0; i < 10; i++){
var element:* = new cls();
array.push(element);
}
return o.prototype.constructor(array);
}
live example at wonderfl:
http://wonderfl.net/c/pkjs
Based on #Patrick answer I found a working solution.
Check it out:
function createVector(cls:Class):*{
var className:String = getQualifiedClassName(cls);
var vectorClass:Class = getDefinitionByName("__AS3__.vec::Vector.<"+className+">") as Class;
var vector:* = new vectorClass(10);
for(var i:int = 0; i < 10; i++){
var element:MyClass = new cls(); // may be Object or Object extends cls
vector[i] = element;
}
return vector;
}
I need to dynamically generate a object like this
{type:"typeA",size28:0,size29:0,size30:0 etc...}
I get the sizes from a xml file as an array and I need to insert it like this
{type:"typeA",here the generated size array but as the object properties}
How can I do this?
Thanks in advance.
I assume that the length of the array is variable:
var obj : Object = {type:"typeA"}
for (var i : int = 0; i < generatedArray.length; i++) {
obj['size'+(28+i)] = generatedArray[i];
}
var xmlData:XML = <obj>
<contents>size28:5,size29:3,size30:9</contents>
</obj>;
var obj:Object = new Object();
var xmlObjArray:Array = xmlData.contents.split(",");
for (var i in xmlObjArray)
{
var objProp:Array = xmlObjArray[i].split(":");
obj[objProp[0]] = objProp[1];
}
trace (obj.size29);
Would it be possible to use Array.indexOf() to search through an Array by the properties of the Objects within the array:
var myArray:Array = new Array();
var myMovieClip = new MovieClip();
myMovieClip.name = "foo";
myArray.push(myMovieClip);
myArray.indexOf(MovieClip.name == "foo"); //0
OR
myArray.indexOf(myMovieClip.name == "foo"); //0
Both indexOf() above do not work, is there away to achieve this with the correct syntax?
Look into Array's filter method (newly available for AS3). You can write a filter method that returns all objects that will meet your criteria (in your case, a movieclip with a certain name)
index of will search for an entry ... MovieClip.name == "foo" should throw a compiler error, since MovieClip does not have a property "name" ... myMovieClip.name == "foo" will be true, and then you will get the index of true, if it is in the array at all ...
if you really need the index, you will need to iterate over the array ... by key ... or in an incremental loop, if the array is numeric and dense ...
if the array is associative (string keys used) you imperatively need to use for-in loops, since filter and related functions will only cover numeric indices ...
in a numeric array, i'd suggest one of the following two approaches:
//this will return an array of all indices
myArray.map(function (val:*,index:int,...rest):int { return (val.name == "foo") ? index : -1 }).filter(function (val:int,...rest):Boolean { return val != -1 });
//here a more reusable utility function ... you may want to put it to some better place ... just as an example ...
package {
public class ArrayUtils {
public static function indexOf(source:Array, filter:Function, startPos:int = 0):int {
var len:int = source.length;
for (var i:int = startPos; i < len; i++)
if (filter(source[i],i,source)) return i;
return -1;
}
}
}
//and now in your code:
var i:int = ArrayUtils.indexOf(myArray, function (val:*,...rest):Boolean { return val.name == "foo" });
hope that helped ... ;)
greetz
back2dos
Though back2dos' method is cool, I think beginners might find it overly-complicated, so for the sake of them here is a simpler method, that may be easier to use, though won't be as versatile for any situation as back2dos' method.
var myArray:Array = new Array();
var myMovieClip1 = new MovieClip();
var myMovieClip2 = new MovieClip();
myMovieClip1.name = "foo";
myMovieClip2.name = "bar";
myArray.push(myMovieClip1);
myArray.push(myMovieClip2);
function getIndexByName(array:Array, search:String):int {
// returns the index of an array where it finds an object with the given search value for it's name property (movieclips, sprites, or custom objects)
for (var i:int = 0; i < array.length; i++) {
if (array[i].name == search) {
return i;
}
}
return -1;
}
trace("bar index = "+getIndexByName(myArray, "bar"));
trace("foo index = "+getIndexByName(myArray, "foo"));
myMovieClip.name == "foo";
^== if you want to assign a variable, use
myMovieClip.name = "foo";
Here is what I did. Change the function name if you want... this is all just for the sake of explanation.
getObjectFromArrayByProperty(arrayToSearch, 'oBjectProperty', 'value');
function getObjectFromArrayByPoperty(array:Array, _property, search:String):Object{
for (var i:int = 0; i < array.length; i++) {
if (array[i][_property] == search) {
return array[i];
}
}
return null;
}
This returns the object instead of just an index. If a match is not found, the function returns null.
I'm trying to pass the current value of a variable when an a dynamically generated navigation 'node' is clicked. This needs to just be an integer, but it always results in the last node's value.. have tried some different methods to pass the value, a custom event listener, a setter, but I suspect it's a closure problem.. help would be appreciated ;-)
function callGrid():void {
for (var i:Number = 0; i < my_total; i++) {
var gridnode_url = my_grid[i].#gridnode;
var news_category= my_grid[i].#category;
var newstitle = my_grid[i].#newstitle;
var news_content = my_grid[i]..news_content;
var news_image = my_grid[i]..news_image;
var gridnode_loader = new Loader();
container_mc.addChild(gridnode_loader);
container_mc.mouseChildren = false;
gridnode_loader.load(new URLRequest(gridnode_url));
gridnode_loader.contentLoaderInfo.addEventListener(Event.COMPLETE, gridLoaded);
gridnode_loader.name = i;
text_container_mc = new MovieClip();
text_container_mc.x = 0;
text_container_mc.mouseEnabled = false;
var textY = text_container_mc.y = (my_gridnode_height+18)*y_counter;
addChild(text_container_mc);
var tf:TextSplash=new TextSplash(newstitle,10,0,4 );
container_mc.addChild(tf);
tf.mouseEnabled = false;
tf.height = my_gridnode_height;
text_container_mc.addChild(tf);
var text_container_mc_tween = new Tween(text_container_mc, "alpha", Strong.easeIn, 0,1,0.1, true);
gridnode_loader.x = (my_gridnode_width+5) * x_counter;
gridnode_loader.y = (my_gridnode_height+15) * y_counter;
if (x_counter+1 < columns) {
x_counter++;
} else {
x_counter = 0;
y_counter++;
}
}
}
function gridLoaded(e:Event):void {
var i:uint;
var my_gridnode:Loader = Loader(e.target.loader);
container_mc.addChild(my_gridnode);
_xmlnewstarget = my_gridnode.name;
//||||||||||||||||||||||||||||||||||||||||
//when a particular grid node is clicked I need to send the current _xmlnewstarget value to the LoadNewsContent function...
//||||||||||||| ||||||||||||||||||||||||
my_tweens[Number(my_gridnode.name)]=new Tween(my_gridnode, "alpha", Strong.easeIn, 0,1,0.1, true);
my_gridnode.contentLoaderInfo.removeEventListener(Event.COMPLETE, gridLoaded);
my_gridnode.addEventListener(MouseEvent.CLICK, loadNewsContent);
}
function loadNewsContent(e:MouseEvent):void {
createNewsContainer();
getXMLNewsTarget();
news_category = my_grid[_xmlnewstarget].#category;
var tfnews_category:TextSplash=new TextSplash(news_category,20,16,32,false,false,0xffffff );
tfnews_category.mouseEnabled = false;
newstitle = my_grid[_xmlnewstarget].#newstitle;
var tftitle:TextSplash=new TextSplash(newstitle,20,70,24,false,false,0x333333 );
news_container_mc.addChild(tftitle);
tftitle.mouseEnabled = false;
news_content = my_grid[_xmlnewstarget]..news_content;
var tfnews_content:TextSplash=new TextSplash(news_content,20,110,20,true,true,0x333333,330);
news_container_mc.addChild(tfnews_content);
tfnews_content.mouseEnabled = false;
news_image = my_grid[_xmlnewstarget].#news_image;
loadNewsImage();
addChild(tfnews_category);
addChild(tftitle);
addChild(tfnews_content);
var news_container_mc_tween = new Tween(news_container_mc, "alpha", Strong.easeIn, 0,1,0.3, true);
news_container_mc_tween.addEventListener(Event.INIT, newsContentLoaded);
}
I'm not going to try to read your code (try to work on your formatting, even if it's just indenting), but I'll provide a simplified example:
for (var i = 0; i < my_total; i++) {
var closure = function() {
// use i here
}
}
As you say, when closure is called it will contain the last value of i (which in this case would be my_total). Do this instead:
for (var i = 0; i < my_total; i++) {
(function(i) {
var closure = function() {
// use i here
}
})(i);
}
This creates another function inside the loop which "captures" the current value of i so that your closure can refer to that value.
See also How does the (function() {})() construct work and why do people use it? for further similar examples.
Umm, as mentioned above, the code is a bit dense, but I think you might have a bit of type conversion problem between string and integers, is the "last value" always 0? try making these changes and let me know how you get on.
// replace this gridnode_loader.name = i;
gridnode_loader.name = i.toString();
// explictly type this as an int
_xmlnewstarget = parseInt(my_gridnode.name);
// replace this: my_tweens[Number(my_gridnode.name)] = new Tween(......
my_tweens[parseInt(my_gridnode.name)] = new Tween();
Oh and I think it goes without saying that you should massively refactor this code block once you've got it working.
Edit: after further study I think you need this
//replace this: my_gridnode.addEventListener(MouseEvent.CLICK, loadNewsContent);
var anonHandler:Function = function(e:MouseEvent):void
{
loadNewsContent(_xmlnewstarget);
};
my_gridnode.addEventListener(MouseEvent.CLICK, anonHandler);
Where your loadNewsContent has changed arguements from (e:MouseEvent) to (id:String)
Firstly, you do not need to call addChild for the same loader twice (once in callGrid) and then in (gridLoaded). Then you can try putting inside loadNewsContent: news_category = my_grid[int(e.target.name)].#category;instead of news_category = my_grid[_xmlnewstarget].#category; As _xmlnewstarget seems to be bigger scope, which is why it is getting updated every time a load operation completes.