I'd like to ask about my program bcs it doesn't work correctly. I want to recall a set of variable in two different Sequence Array. Here is my code.
// Array of Arrays
var SequenceGo:Array =
\[
{dt:dt1, P:P1, s0:s01, s:s1},
{dt:dt2, P:P2, s0:s02, s:s2},
{dt:dt3, P:P3, s0:s03, s:s3},
{dt:dt4, P:P4, s0:s04, s:s4},
{dt:dt5, P:P5, s0:s05, s:s5},
{dt:dt6, P:P6, s0:s06, s:s6},
{dt:dt7, P:P7, s0:s07, s:s7},
{dt:dt8, P:P8, s0:s08, s:s8},
{dt:dt9, P:P9, s0:s09, s:s9},
{dt:dt10, P:P10, s0:s010, s:s10},
\];
var SequenceBack:Array =
\[
{dtback:dt10back, P:P10, s0:s010, sback:s10back},
{dtback:dt9back, P:P9, s0:s09, sback:s9back},
{dtback:dt8back, P:P8, s0:s08, sback:s8back},
{dtback:dt7back, P:P7, s0:s07, sback:s7back},
{dtback:dt6back, P:P6, s0:s06, sback:s6back},
{dtback:dt5back, P:P5, s0:s05, sback:s5back},
{dtback:dt4back, P:P4, s0:s04, sback:s4back},
{dtback:dt3back, P:P3, s0:s03, sback:s3back},
{dtback:dt2back, P:P2, s0:s02, sback:s2back},
{dtback:dt1back, P:P1, s0:s01, sback:s1back}
\];
function onNext(index:int = 0):void
{
if (index >= SequenceGo.length)
{
return;
}
var aDataGo:Object = SequenceGo[index];
var aDataBack:Object = SequenceBack[index];
//variables
F = s_teganganst.value;
m = s_masjenst.value/10000;
v = Math.sqrt(F/m);
tp = 5000/v;
f = s_frekuensist.value;
w = 2*Math.PI*f;
aDataGo.dt += t;
aDataGo.s = aDataGo.s0 - A * Math.sin(w * aDataGo.dt);
aDataGo.P.y = aDataGo.s;
if(P10.y < 607){
aDataBack.dtback += t;
aDataBack.sback = - A * Math.sin(w * aDataBack.dtBack);
aDataBack.P.y = aDataGo.s + aDataBack.sback;
}
setTimeout(onNext, tp, index + 1);
}
Actually, code
aDataBack.P.y = aDataGo.s + aDataBack.sback;
is not a fit code for the animation because aDataBack is ordered inversely from aDataGo (we have to stay this inverse order for the proper animation in my program). I want to recall the variables based on its number, so each variable will match with another variable. For example,
P1.y = s1 + s1back;
P2.y = s2 + s2back;
P3.y = s3 + s3back;
P4.y = s4 + s4back;
//and so on
I've tried the code above, but it also doesn't work. Any other expression for calling some couples of variables just like my code above? Thanks!
I want to recall the variables based on its number, so each variable will match with another variable
Ok, there are two options.
Option one, simple and straightforward: compose a method to find the correspondent back object on spot:
function findBack(P:Object):Object
{
for each (var aDataBack:Object in SequenceBack)
{
if (aDataBack.P == P)
{
return aDataBack;
}
}
}
So, that piece of code would be
var aDataGo:Object = SequenceGo[index];
var aDataBack:Object = findBack(aDataGo.P);
The possible problem here is the performance. It is fine on the scale of 10 or 100 objects, but as (I suppose) you devise a particle system, the object count easily scales to thousands, and the amount of loop-searching might become cumbersome.
So I advise to prepare a pre-indexed hash so that you won't need to search each single time.
var SequenceBack:Array =
[
// ...
];
// Dictionary is a storage of key:value data, just like Object,
// but Dictionary allows Object keys.
var HashBack:Dictionary = new Dictionary;
for each (var aDataBack:Object in SequenceBack)
{
HashBack[aDataBack.P] = aDataBack;
}
I encourage you to read more about Dictionary class.
And so that piece of code would be
var aDataGo:Object = SequenceGo[index];
var aDataBack:Object = HashBack[aDataGo.P];
i want to make end-subscription after admin enter the value/date into text_box then it will push to array,after that i want when time reach the date that been enter the application will exit.
But I don't know the method.
below is my code
var my_date:Date;
var my_timer:Timer=new Timer(1000);
my_timer.addEventListener(TimerEvent.TIMER, onTimer);
my_timer.start();
var tarikh:Array = new Array();
tarikh.hari = [0];
tarikh.bulan = [1];
tarikh.tahun = [2];
my_date = new Date();
function onTimer(e:TimerEvent):void
{
my_date = new Date();
//trace(my_date.date + ":" + my_date.month + " : " + my_date.fullYear );
}
btnCuba.addEventListener(MouseEvent.CLICK,MMM);
function MMM (event:MouseEvent):void
{
tarikh.hari = String(hari.text);
tarikh.bulan = String(bulan.text);
tarikh.tahun = String(tahun.text) ;
tarikh.push(hari,bulan,tahun);
setHours();
trace(tarikh.hari + "" + tarikh.bulan + "" + tarikh.tahun);
}
function setHours():void
{
if (my_date.date == tarikh.hari && my_date.month == tarikh.hari && my_date.fullYear == tarikh.hari && && my_date.minutes == 01)
{
NativeApplication.nativeApplication.exit();
}
else
{
my_timer.start();
}
}
tarikh is an array. Arrays are assigned to using the array index access operator. When you want to store data in an array, you do it like this:
array_name[index] = value
or in this case,
tarikh[0] = hari;
Looking at the code, tarikh seems to mean date, hari, bulan and tahun seem to mean day, month and year. The Date class doesn't have these properties (you'll have to translate them to English); alternatively, an easier method of comparing dates is just to compare the getTime() function returns by the two date objects:
if(my_date.getTime() == tarikh.getTime()) { NativeApplication.nativeApplication.exit(); }
The problem is that tarikh is not a Date object now, but is an Array. Arrays don't have any properties by themselves (apart from length), so maybe you're looking for a tarikh being a Date object? You could try making tarikh as a Date object with the values like so:
tarikh = new Date(hari.text + " " + bulan.text + " " + tahun.text); if the text values are letters (like Tue Feb 3 2005), otherwise if they are numbers or integers then try casting it and using it in the appropriate parameter.
I have a date like:
19/août/2016 (août = august)
And I have the following function which changes the month into a number:
function swapMonthForNumber(str:String):String {
//do the same line of code for every item in the array
for(var i:int=0;i<months.length;i++){
//i is the item, which is 0 based, so we have to add 1 to make the right month number
str = str.replace(months[i],String(+i+1));
}
//return the updated string
return str;
}
str = swapMonthForNumber(mySharedObject.data.theDate);
trace("Php will use this date :"+str);
So str will be 19/8/2016, but I want str to be 19/08/2016 (adding a 0 before the 8).
How can I do this?
Check out the reference of the Date class!
If forgot to mention this link : flash.globalization.DateTimeFormatter
DateTimeFormatter(requestedLocaleIDName:String, dateStyle:String = "long", timeStyle:String = "long")
Here is an example.
import flash.globalization.DateTimeFormatter;
var df:DateTimeFormatter = new DateTimeFormatter(LocaleID.DEFAULT, DateTimeStyle.SHORT, DateTimeStyle.NONE);
var currentDate:Date = new Date(2016,7,19);
var shortDate:String = df.format(currentDate);
trace (shortDate);
// output : 19/08/2016
DateTimeStyle
LocaleID
Adding leading zeros to a number is commonly called zero padding.
Below is a function to do this, from the answer here.
public function zeroPad(number:int, width:int):String {
var ret:String = ""+number;
while( ret.length < width )
ret="0" + ret;
return ret;
}
In your swapMonthForNumber function, in the for loop, swap the code for this:
var month = zeroPad(i + 1, 2);
str = str.replace(months[i], month);
I am using a forEach loop that adds movieclips to the stage for each node in my XML. How does one give these movieclips unique instance names as their being added in the loop?
Here is my parseList function which contains the forEach loop mentioned and the syntax I'm using which isn't working for me.
private function parseList():void {
//use Number variables to keep track of current x and y properties as list display is generated
var titleField:TextField = TextField(listItem);
var itemY:Number = 503;
var itemX:Number = 0;
var artistTracker:String = Playmaster_Jukebox.currArtist;
var artID = 0;
var albID = 0;
var itemID:Number=0;
for each (var listItemData:XML in mainXML.artist[artID].album[albID].track) {
var listItem:MovieClip = new ListItem(itemTitle);
listContainer.addChild(listItem);
listItem.name = "itemID" + " " + albID + " " + itemID;
itemID++;
listItem.y = itemY;
listItem.x = itemX;
TextField(listItem.listItemTitleField);
itemY += listItem.height + 10;
}
}
I am a beginner with the forEach loop and don't understand it yet so comments are appreciated!
If I understand your question correctly; then you're asking how to store the "listItem" MovieClips as you read them from the XML document.
To do this you're probably going to want to use either an Array or a Map:
Using an Array ie:
var listItemArray:Array = new Array();
for each (var listItemData:XML in mainXML.artist[artID].album[albID].track) {
var listItem:MovieClip = new ListItem(itemTitle);
listContainer.addChild(listItem);
listItemArray.push(listItem);// adds the item to the array
}
Using a Map ie:
var listItemMap:Object = {};
for each (var listItemData:XML in mainXML.artist[artID].album[albID].track) {
var listItem:MovieClip = new ListItem(itemTitle);
listContainer.addChild(listItem);
listItem.name = "itemID" + " " + albID + " " + itemID;
listItemMap[listItem.name];// adds an item by the .name you created for it.
}
The map will allow you too look up the items by the names you've given the different items. ie: listItemMap["name"] would find the element with named "name".
The array will allow you to loop through them in order. ie: listItemArray[0] would find the first element.
It's up to you to decide which would be better for your purposes.
Hopefully this is easy but that sometimes means its impossible in flex and I have searched quite a bit to no avail.
Say I have a list (LIST#1) of artists:
2Pac
Adele
Amerie
Beyonce
Jason Aldean
Shakira
The Trews
I also have a list (LIST#2) that has the values #,A-Z - how would I create an alphabet jump?
So If a user clicked on "A" in LIST#2 that would automatically scroll to "Adele" at the top of LIST#1 - not filter so he/she could scroll up to view 2Pac or down to view The Tews if they were not in the view yet.
Its a standard Flex Spark List with an ArrayCollection as the dataProvider - the artist field is called: "title" along with a unique id field that is not visible to the user.
Thanks!
Please see comments on marker answer for discussion on Dictionary that may be faster in some cases. See below for code (HAVE NOT CONFIRMED ITS FASTER! PLEASE TEST):
private function alphabet_listChange(evt:IndexChangeEvent) : void {
var letter:String;
letter = evt.currentTarget.selectedItems[0].toString();
trace(currentDictionary[letter]);
ui_lstLibraryList.ensureIndexIsVisible(currentDictionary[letter]);
}
public function createAlphabetJumpDictionary() : Dictionary {
//alphabetArray is a class level array containing, A-Z;
//alphabetDictionary is a class level dictionary that indexes A-z so alphabetDictionary["A"] = 0 and ["X"] = 25
var currentIndexDict:Dictionary = new Dictionary; //Dictionary is like an array - just indexed for quick searches - limited to key & element
var searchArray:Array = new Array;
searchArray = currentArrayCollection.source; //currentArrayCollection is the main array of objects that contains the titles.
var currentIndex:Number; //Current index of interation
var currentAlphabetIndex:Number = 0; //Current index of alphabet
for (currentIndex = 0; currentIndex < searchArray.length; currentIndex++) {
var titleFirstLetter:String = searchArray[currentIndex].title.toString().toUpperCase().charAt(0);
if (titleFirstLetter == alphabetArray[currentAlphabetIndex]) {
currentIndexDict[titleFirstLetter] = currentIndex;
trace(titleFirstLetter + " - " + currentIndex);
currentAlphabetIndex++;
} else if (alphabetDictionary[titleFirstLetter] > alphabetDictionary[alphabetArray[currentAlphabetIndex]]) {
trace(titleFirstLetter + " - " + currentIndex);
currentIndexDict[titleFirstLetter] = currentIndex;
currentAlphabetIndex = Number(alphabetDictionary[titleFirstLetter] + 1);
}
}
return currentIndexDict;
}
private function build_alphabeticalArray() : Array {
var alphabetList:String;
alphabetList = "A.B.C.D.E.F.G.H.I.J.K.L.M.N.O.P.Q.R.S.T.U.V.W.X.Y.Z";
alphabetArray = new Array;
alphabetArray = alphabetList.split(".");
return alphabetArray;
}
private function build_alphabetDictionary() : Dictionary {
var tmpAlphabetDictionary:Dictionary = new Dictionary;
for (var i:int=0; i < alphabetArray.length; i++) {
tmpAlphabetDictionary[alphabetArray[i]] = i;
trace(alphabetArray[i] + " - " + i);
}
return tmpAlphabetDictionary;
}
private function buildCurrentDictionary() : void {
trace("Collection Changed");
currentDictionary = new Dictionary;
currentDictionary = createAlphabetJumpDictionary();
}
The Flex Spark list has a very convenient method called ensureIndexIsVisible(index). Check the Flex reference documentation. All you have to do is to find the index of the first artist for the corresponding selected alphabet letter:
public function findAlphabetJumpIndex():Number
{
var jumpToIndex:Number;
var selectedLetter:String = alphabethList.selectedItem;
for (var i:int=0; i < artists.length; i++)
{
var artistName:String = artists.getItemAt(i);
var artistFirstLetter:String = artistName.toUpperCase().charAt(0);
if (artistFirstLetter == selectedLetter)
{
jumpToIndex = i;
break;
}
}
return jumpToIndex;
}
You can iterate your artist list data provider and check if artist name starts with selected alphabet from list two. When corresponding artist is found, set artist list selected index a value what you get from iterating data.