Converting an array to an array collection

When converting an array to an array collection, is it good
practice to remove the original array? If so, how does one do
that?

My 2 cents - I think it may be unnecessary. The garbage
collector should notice a lack of references to the original array
and delete it for you.

Similar Messages

How to convert an array collection instance to a complex object for interaction with webservice

Hi there,
I have a stubborn problem that I am trying to work out the best way to solve the problem. I am interacting with a WebService via HTTPService calling a method called find(String name) and this returns me a List of ComplexObjects that contain general string and int params and also lists of other Complex Objects. Now using the code:
ArrayCollection newOriginalResultsArray = new ArrayCollection(event.result as Array)
flex converts my complex objects results to an arraycollection so that I can use it in datagrids etc. Now up until this part is all good. My problem is when getting a single instance from the results list, updating it by moving data around in a new datagrid for example - I want to interact with the webservice again to do an create/update. This is where I am having problems - because these webservice methods require the complex object as a parameter - I am struggling to understand how I can convert the array collection instance back to my complex object without iterating over it and casting it back (maybe this is the only way - but I am hoping not).
I am hoping that there is a simple solution that I am missing and that there is some smart cookie out there that could provide me with an answer - or at least somewhere to start looking. I guess if I have no other alternative - maybe I need to get the people who built the service to change it to accept an array - and let them do the conversion.
Any help would be greatly appreciated.
Bert

Hi Bert,
According to my knowledge you can use describeType(Object) method which will return an XML... That XML will contain Properties and values just iterate through the XML and create a new Object..   Probably u can use this method...
public function getObject(reqObj:Object,obj:Object,instanceName:String,name:String=null,index:int=-1):Obj ect
            if(!reqObj)
                reqObj = new Object();
            var classInfo:XML = describeType(obj);
            var className:String = instanceName;
            if(name!=null)
                className=name+"."+className;
            if(index!=-1)
                className=className+"["+index+"]";
            for each (var v:XML in classInfo..accessor)
                var attributeName:String=v.@name;
                var value:* = obj[attributeName]
                var type:String = v.@type;
                if(!value)
                    reqObj[className+"."+attributeName] = value;
                else if(type == "mx.collections::ArrayCollection")
                    for(var i:int=0;i<value.length;i++)
                        var temp:Object=value.getItemAt(i);
                        getReqObject(reqObj,temp,attributeName,className,i);
                else if(type == "String" || type == "Number" || type == "int" || type == "Boolean")
                    reqObj[ className+"."+attributeName] = value;
                else if (type == "Object")
                    for (var p:String in value)
                        reqObj[ className+"."+attributeName+"."+p] = value[p];
                else
                    getReqObject(reqObj,value,attributeName,className);
            return reqObj;
Thanks,
Pradeep

Convert a string to an array/collection

Hi,
I have a string
String s = "[ab,cd,ef,gh]";How can I convert this into a string array , arraylist or vector such that ab, cd, ef, gh are the elements of the array/collection.
Please help.
Any help in this regard will be well appreciated with dukes.
Regards,
Anees

virusakos wrote:
codingMonkey, the "^\\[|\\]$" regular expression will only work for [....,...,....] inputs and not for [...,[....],]...[,...] inputs.
The OP should find the correct regular expression according to the requirements ;-)Meaning that any brackets which are part of the actual data will remain intact.

Object Array --- Collection

Is there any way to directly convert and object Array to a Collection object. Basically i need to create a ArrayList from Object Array. The ArrayList has a constructor and also provides a method addAll() that accept Collection as parameter. So the problem becomes , how to convert Object Array to collection. As per my understanding all arrays should be essentially Collection Interface subclass.
So why am i not able to cast?
What is wrong in calling Object Array a sub class of Collection?
// OrderLineItem[] is the object array that i wish to have as ArrayList
// This code generates error -
//"ErpOrder.java": Error #: 364 : cannot cast gal.ERP.OrderLineItem[] to java.util.Collection
public void setLineItems( OrderLineItem[] arrOrderLineItem ) {
m_arrLineItems = new ArrayList((Collection)arrOrderLineItem);
}Is there no way except iterating through the array and adding individual Objects to ArrayList?

By "Object array" do you mean an Array class, or do you mean an Object[]? They are different. The Array class wraps an Object[] and provides useful methods to manipulate it.
There is no such thing as a Collection object, per say. "Collection" is an interface implemented by many objects such as LinkedList, Vector, ArrayList, HashSet, and TreeSet.
The Collection interface is designed to be an interface to any object that can keep a mutable list of other Objects, check to see if an Object is in that list, and iterate through all Objects in the list.
As far as resources go, I suggest the API reference at http://java.sun.com/j2se/1.4.1/docs/api/index.html.

Accessing Query ColumnList in Array Collection

I want to get the Column names in a query object returned
from a WebService as an Array Collection.
I have a WebService that is returning the following SOAP
data:
<?xml version="1.0"
encoding="utf-8"?><soapenv:Envelope xmlns:soapenv="
http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsd="
http://www.w3.org/2001/XMLSchema"
xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance">
<soapenv:Body>
<ns1:sStockQuotesResponse soapenv:encodingStyle="
http://schemas.xmlsoap.org/soap/encoding/"
xmlns:ns1="
http://cfc.private">
<sStockQuotesReturn xsi:type="ns2:QueryBean" xmlns:ns2="
http://rpc.xml.coldfusion">
<columnList soapenc:arrayType="xsd:string[4]"
xsi:type="soapenc:Array" xmlns:soapenc="
http://schemas.xmlsoap.org/soap/encoding/">
<columnList
xsi:type="xsd:string">name</columnList>
<columnList
xsi:type="xsd:string">symbol</columnList>
<columnList
xsi:type="xsd:string">lastprice</columnList>
<columnList
xsi:type="xsd:string">lastpricedate</columnList>
</columnList>
<data soapenc:arrayType="xsd:anyType[][7]"
xsi:type="soapenc:Array" xmlns:soapenc="
http://schemas.xmlsoap.org/soap/encoding/">
<data soapenc:arrayType="xsd:anyType[4]"
xsi:type="soapenc:Array">
<data xsi:type="soapenc:string">ALCOA INC</data>
<data xsi:type="soapenc:string">AA</data>
<data xsi:type="soapenc:string">35.87</data>
<data xsi:type="soapenc:string">11/12/2007
4:00pm</data>
</data>
</data>
</sStockQuotesReturn>
</ns1:sStockQuotesResponse>
</soapenv:Body>
</soapenv:Envelope>
I have no problem converting the data to a Flex Array
Collection, and populating a DataGrid with this data.
However, I want to grab the Column Names, so that I can
create the DataGrid columns dynamically. I have searched the FB3
documentation, but cannot find an answer. Please help.
Thank you.
Eric.

I'm not sure about dealing with a Remote Object / CFC
configuration, but if your collection essentially ends up like:
var myAC:ArrayCollection = new ArrayCollection([{name:
'First', phoneNumber: '555'}]);
Then yes you should be able to access it with:
myAC.getItemAt(0).phoneNumber
I take this has not worked?

Convert byte array to table of int

[http://www.codeproject.com/KB/database/PassingArraysIntoSPs.aspx?display=Print|http://www.codeproject.com/KB/database/PassingArraysIntoSPs.aspx?display=Print] Hello friends.
I'm pretty new with PL/SQL.
I have code that run well on MSSQL and I want to convert it to PL/SQL with no luck.
The code converts byte array to table of int.
The byte array is actually array of int that was converted to bytes in C# for sending it as parameter.
The TSQL code is:
CREATE FUNCTION dbo.GetTableVarchar(@Data image)
RETURNS @DataTable TABLE (RowID int primary key IDENTITY ,
Value Varchar(8000))
AS
BEGIN
--First Test the data is of type Varchar.
IF(dbo.ValidateExpectedType(103, @Data)<>1) RETURN
--Loop thru the list inserting each
-- item into the variable table.
DECLARE @Ptr int, @Length int,
@VarcharLength smallint, @Value Varchar(8000)
SELECT @Length = DataLength(@Data), @Ptr = 2
WHILE(@Ptr<@Length)
BEGIN
--The first 2 bytes of each item is the length of the
--varchar, a negative number designates a null value.
SET @VarcharLength = SUBSTRING(@Data, @ptr, 2)
SET @Ptr = @Ptr + 2
IF(@VarcharLength<0)
SET @Value = NULL
ELSE
BEGIN
SET @Value = SUBSTRING(@Data, @ptr, @VarcharLength)
SET @Ptr = @Ptr + @VarcharLength
END
INSERT INTO @DataTable (Value) VALUES(@Value)
END
RETURN
END
It's taken from http://www.codeproject.com/KB/database/PassingArraysIntoSPs.aspx?display=Print.
The C# code is:
public byte[] Convert2Bytes(int[] list)
if (list == null || list.Length == 0)
return new byte[0];
byte[] data = new byte[list.Length * 4];
int k = 0;
for (int i = 0; i < list.Length; i++)
byte[] intBytes = BitConverter.GetBytes(list);
for (int j = intBytes.Length - 1; j >= 0; j--)
data[k++] = intBytes[j];
return data;
I tryied to convert the TSQL code to PL/SQL and thats what I've got:
FUNCTION GetTableInt(p_Data blob)
RETURN t_array --t_array is table of int
AS
l_Ptr number;
l_Length number;
l_ID number;
l_data t_array;
BEGIN
     l_Length := dbms_lob.getlength(p_Data);
l_Ptr := 1;
     WHILE(l_Ptr<=l_Length)
     loop
          l_ID := to_number( DBMS_LOB.SUBSTR (p_Data, 4, l_ptr));
          IF(l_ID<-2147483646)THEN
               IF(l_ID=-2147483648)THEN
                    l_ID := NULL;
               ELSE
                    l_Ptr := l_Ptr + 4;
                    l_ID := to_number( DBMS_LOB.SUBSTR(p_Data, 4,l_ptr));
               END IF;
               END IF;
l_data(l_data.count) := l_ID;
          l_Ptr := l_Ptr + 4;
     END loop;
     RETURN l_data;
END GetTableInt;
This isn't work.
This is the error:
Error report:
ORA-06502: PL/SQL: numeric or value error: character to number conversion error
06502. 00000 - "PL/SQL: numeric or value error%s"
I think the problem is in this line:
l_ID := to_number( DBMS_LOB.SUBSTR (p_Data, 4, l_ptr));
but I don't know how to fix that.
Thanks,
MTs.

I'd found the solution.
I need to write:
l_ID := utl_raw.cast_to_binary_integer( DBMS_LOB.SUBSTR(p_Data, 4,l_ptr));
instead of:
l_ID := to_number( DBMS_LOB.SUBSTR (p_Data, 4, l_ptr));
The performance isn't good, it's take 2.8 sec to convert 5000 int, but it's works.

How can I convert an array off byte into an Object ?

Hi folks...
I�m developing an application that comunicates a PDA and a computer via Wi-Fi. I�m using a DataStream ( Input and Output ) to receive / send information from / to the computer. Most off the data received from him is in the byte[] type...
How can I convert an array off byte ( byte[] ) into an Object using MIDP 2.0 / CLDC 1.1 ?
I found on the web 2 functions that made this... but it uses a ObjectOutputStream and ObjectInputStream classes that is not provided by the J2ME plataform...
How can I do this ?
Waiting answers
Rodrigo Kerkhoff

There are no ObjectOutputStream and ObjectInputStream classes in CLDC. You must know what you are writing to and reading from the DataStream. You should write the primitives like int, String to the DataOutputstream at one end and read those in exactly the same sequence at the outher end using readInt(), readUTF() methods.

How do I convert an array of BYTES (where each BYTE represents a bit) into a single Hex number?

I am reading a signal from a USB-8451. This signal is stored as an array where each element represents a bit in the signal, but is stored in the array as a byte. How do I convert this array into a single Hex number. I attatched what I have so far, there are a few extra things to help me see what ia going on. One code uses Queue and the other uses arrays, let me know if you can help.
Attachments:
845x_EEPROMarrays.vi ‏27 KB
845x_EEPROM.vi ‏26 KB

mkssnwbrd wrote:
... so we can't introduce any other forms of signals or power into the circuit other than what the circuit already has. Trithfully I don't really know how I2C devices work, but my mentor here says that we can't use an I2C method becuase it will introduce voltage into the circuit and may damage out TCON chip.
That makes absolutely no sense. What do you think is happening when you write the digital lines? You're setting a pin high. That voltage is being generated by the 8451x. I think you're not understanding what your mentor is saying. If it's an I2C device then you should be able to use the I2C function to simply talk to it. You still have not indicated what the device is, so there's little more I can say about that aspect of it.
As far as the conversion is concerned, you basically need loop through your array of "bits", taking 16 at time since you said you have 16-bit values. It's not clear from your code whether your eventual goal is to get a numeric value or a string. This does not appear to be a subVI, so a simply numeric indicator formatted to display in hex format should be quite adequate. The array you are generating is an array of rings, whose datatype is I32, but they will have values of 0 or 1. You can use the example just posted, or you can use the attached variation.
Attachments:
Bits to Hex 2.vi ‏17 KB

Multiple Comboboxes with single instance of Array Collection

First off - thanks to everyone for their contributions. This forum provides a lot of good information.
I'm stuck on a particular problem and I suspect I'm not thinking about the issue correctly.
I'm developing a dynamic module that instantiates components at runtime based on an XML scheme. Many of these components are drop-downs that are chained togther (a selection in one drives the population of the next)
I loop through the initial XML document to create and layout the components. I have been using a single Array Collection to populate the drop-down. This worked fine with the chained comboboxes since I only load one combox initially. However, when I add a couple of static combo boxes, the arraycollection seemed to be binding to the orginal combobox. For example, if I create 3 combo boxes they have drop-down values that display all 3 lists appended together. I was a bit surprised because I didn't think that I could bind an Array Collection. I certainly haven't defined a Binable ArrayCollection.
I thought I could solve the issue by simply creating a unique Array Collection at runtime - one for each element. However, I don't think this is possible or I can't figure out how to create a new Array Collection with a dynamic name - something like this:
I was hoping this would work -
var newDropDown_[numOfElement]:ArrayCollection = new ArrayCollection();
I've tried to use a Dictionary object to store each ArrayCollection. I couldn't get that to work properly.
Essentially - my code loops on the number of components to add:
for (var i:int = 0; i < numFormElements; i++)
          for (var j:int = 0; j < numvalues; j++)
                                var valuefield:String = 'value_' + [j+1];
                                var obj:Object=new Object();
                                obj.label=instFields[i][valuefield].@label;
                                obj.data=instFields[i][valuefield].@data;
                                newDropDown.addItemAt(obj,j);
Then I add the components:
          var c:ComboBox = new ComboBox ();
            c.labelField='label';
            c.name=numberOfElement.toString();
            c.dataProvider=    newDropDown;
            _h1.addChild(c);
            numComboDropDwns.push(c);
I need a way of looping, getting data and populating each component independently??
Any ideas?
Thanks,
John

I went a different route and solved the issue. For someone looking at a similar problem - this what I ended up doing:
I just loaded one array collection with data for all of the drop-downs on the form. I then populated each dataprovider with individual elements from the array.
for (var i:int = 0; i < numFormElements; i++)
for (var j:int = 0; j < numvalues; j++)
                                var valuefield:String = 'value_' + [j+1];
                                var obj:Object=new Object();
                                obj.label=instFields[i][valuefield].@label;
                                obj.data=instFields[i][valuefield].@data;
                                newDropDown.addItemAt(obj,elementCounter);
                                elementCounter = elementCounter + 1;
I keep track of the element #, number of values for each element and the overall index for the array.
Each data provider is then loaded with the subset from the array:
for (var z:int = (_counter - _numvalues) ; z < _counter; z++)
                            var _label:String=    newDropDown.getItemAt(z).label.toString();
                            var _data:String = newDropDown.getItemAt(z).data.toString();
                            c.dataProvider.addItem({label:[_label],data:[_data]});
This seems to work nicely - each component is created and loaded with only their data. I spent 3 days searching for a way to create a dynamic arraycollection at runtime. I don't think it's possible - but I'm not sure it was the best method anyway.

How can I convert an array to image(8bit)

I can convert an array(acquire from usb camera)to a picture,but not images(8 bit grayscale),how can I do it.many thanks!
Attachments:
array to image.vi ‏249 KB

Sorry, this is the kind of thing that happens when you have been out for too long.
Message Edité par chilly charly le 10-22-2006 11:09 AM
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...
Attachments:
array%20to%20image[1].png ‏3 KB

How can I convert an array with varying length into a cluster

Hi,
I need to convert an array of n elements into a cluster. Usually, it only involves the "Array to Cluster" function. But since the array length is not constant and the number of elements in the function is constant and can not be changed programaticaly, I need to find another way to do that.
Any ideas?
Thanks.

Hi,
I also tried to do this but without success. I think that's not possible.
For me it's a general problem using labview. I often wanted to generate standard controls dynamically which is not possible (or I haven't found the solution yet). So I think that's the reason why you can't create a cluster during runtime (the program would have to add controls dynamically to the cluster).
Do you have an upper limit for your array-size? Although it needs a lot more memory, it would be a possibility to create the cluster with the maximum number of elements.
If you don't have a maximum, you will have to look for another way, I'm afraid.
Thomas
Using LV8.0
Don't be afraid to rate a good answer...

Getting a single value from an array collection

I have an array collection that was created from an XML file
through the HTTP Service. One of the nodes in the XML file was
product_number and I can display all of the items in this node in a
datagrid so I know the array has the name of the node in it.
I would like to be able to retrieve a single item from the
array collection (e.g. a product_number = to xxx) and assign it to
a variable.
I would also like to be able to assign all the items in a
particlur column (e.g. all product_numbers) to separate variables
at the same time.
Any help would be greatly appreciated.

You can apply a filterFunction.
Or you can do it the brute force way: loop over the elements,
and test for the value you want.
As far as putting values into variables, I am not sure what
you want.
And this is not a Flex Builder question and should go in the
General Discussion forum.
Tracy

Referencing values in Array Collection?

I'm using a Remote Object to pass an argument to a CFC. I
then query a table according to the value of the argument passed in
('where' clause). I return a single record result as a query in
Flex (event.result) and set it as an Array Collection, example:
myAC = new ArrayCollection;
myAC.source = event.result as Array;
I can take this AC and set it as a dataprovider for a data
grid or list without problem. What I'd like to do is pull specific
data from the AC and use it in my Flex app. For example, the
results of my query will return 1 record only, but contains many
columns from my table. It might contain an ID, a username, a first
and last name, maybe a phone number, etc. All this info for that
single record will be stored in the array collection. What I want
to do is be able to reference this data in Flex.
For instance, if I need to display the phone number (stored
as phoneNumber from my query) in the array collection, how can I do
this? myAC.phoneNumber? myAC.getItemAt(0).phoneNumber?
Any guidance is appreciated

I'm not sure about dealing with a Remote Object / CFC
configuration, but if your collection essentially ends up like:
var myAC:ArrayCollection = new ArrayCollection([{name:
'First', phoneNumber: '555'}]);
Then yes you should be able to access it with:
myAC.getItemAt(0).phoneNumber
I take this has not worked?

How to find and modify item in a nested array collection?

Hi,
would anybody know how to find and modify item in a nested
array collection:
private var ac:ArrayCollection = new ArrayCollection([
{id:1,name:"A",children:[{id:4,name:"AA",children:[{id:8,name:"AAA"}]},{id:5,name:"AB"}]} ,
{id:2,name:"B",children:[{id:6,name:"BA"},{id:7,name:"BB"}]},
{id:3,name:"C"}
Let's say I've got object {id:8, name:"X"} , how could I find
item in a collection with the correspoding id property, get handle
on it and update the name property of that object?
I'm trying to use this as a dataprovider for a tree populated
via CF and remoting....
Thanks a lot for help!

Thanks a lot for your help!
In the meantime I've come up with a recursive version of the
code.
This works and replaces the item on any level deep:
private function findInAC(ac:ArrayCollection):void{
var iMatchValue:uint=8;
for(var i:uint=0; i<ac.length; i++){
if(ac
.id == iMatchValue){
ac.name = "NEW NAME";
break;
if(ac
.children !=undefined){
findInAC( new ArrayCollection(ac.children));
However, if I use the array collection as a dataprovider for
a tree and change it, the tree doesn't update, unless I collapse
and reopen it.
Any ideas how to fix it ?

Adding property/field to an item inside array collection

Hi
I'm newbie. But I'm spending a huge amout of time trying to figure out something that should be simple.
in short:
I wanted to add a new field/property to an item inside an arraycollection(ac).
I thought something like:
ac.souce[i].push(object:value)
would do (its inside a loop, since I have ac.length) but it didnt.
ITS IMPORTANT TO SAY THAT:
i think addItem, or addItemAt IS NOT THE CASE.
I want to add an new item INSIDE the array that is wrapped in ac.
in long:
I have a ORDERS table that comes with a client_id (int).
I need to retrieve the client's name from a CLIENTS table.
Ok i have to put everything on the same datagrid. So, first i've tried to ivoke a function like this that would use the getClientsByID and return a string with its name.
It didn't worked, maybe due to the syntax.
SO, i thought i had to put all those 2 tables into 1 array collection to use this as a 'formated' data provider for the datagrid.
What should I do? this is a simples example.
Thanks a lot
Btp~

Just borrow code from ListBase.as, don't actually use an instance of ListBase. That pattern should work for non-display classes as well.
Alex Harui
Flex SDK Developer
Adobe Systems Inc.
Blog: http://blogs.adobe.com/aharui

Converting an array to an array collection

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