RE: [flexcoders] selectedIndices are Strings???

Thu, 08 Jun 2006 10:50:04 -0700

You know, I looked at that page in the docs this morning, but I guess my eyes just skipped right past that part.

 

It seems decidedly counterintuitive, but I should be used to that by now; I’ve been developing Flash apps for 6 years!

 

Thank you for the help. Now I can go back and simplify my code!

 

Jim

 

From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Tom Bray
Sent: Thursday, June 08, 2006 1:26 PM
To: [email protected]
Subject: Re: [flexcoders] selectedIndices are Strings???

 

From the docs on Array.sort():

"All elements, whatever the data type, are sorted as if they were strings, so 100 precedes 99, because "1" is a lower string value than "9". "

But you can easily change the default sort behavior by doing this:

arr.sort(Array.NUMERIC);

-Tom

On 6/8/06, Jim Robson <[EMAIL PROTECTED]> wrote:

Thanks Tom,

 

I believe array indices are ints, not strings. However, I also believe that datagrid indices are strings, because when I used the Array.sort() function on the DataGrid.selectedIndices array, the order was all messed up. For example, "10" came before "2". For that reason, I ended up writing a custom sort function to get around the issue.

 

Thanks again!

 

Jim

 

From: [email protected] [mailto: [email protected]] On Behalf Of Tom Bray
Sent: Thursday, June 08, 2006 1:07 PM
To: [email protected]
Subject: Re: [flexcoders] selectedIndices are Strings???

 

Try either of these two options:

            for( var i:int; i < arr.length; i++ )
            {
                trace( arr[i] );
            }
           
//or

            for each( var i:int in arr )
            {
                trace( i );
            }

The for...in loop that you're using is for iterating over the properties of objects, which it expects to evaluate as strings.  So, in your for...in loop, the var i refers to the indices of the array, not the values you're looking for which are the selectedIndices of your dg.  The for...each loop above is new to AS3 and is the simplest way to do what you want.

HTH,

Tom

On 6/8/06, Jim Robson <[EMAIL PROTECTED]> wrote:

I don't understand why DataGrid.selectedIndices returns an array of Strings. I thought that indices were generally integers. (For example, Array.indexOf returns an int.)

Can anyone explain why the selected index of a DataGrid is a String?

When "dgTest" is a DataGrid instance, the following code generates a compiler error:

 

 

var arr:Array = dgTest.selectedIndices;

for(var i:int in arr){

// do something

}

 

The error that the compiler returns is as follows:

"Implicit coercion of a value of type String to an unrelated type int.  "

 

 

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