anyone know a good book on A4X ????

One thing that would be really useful for me would be an E4X equivalent of SQL’s IN command, in that I want to create a filter based on a collection I’ve generated previously.

Example:
I have a bunch of “zone” nodes that contain “userid” children, which hold a numeric value. I also have a bunch of “person” nodes with an “id” attribute.

For a given “zone” node, I get an XMLList of the values of all the “userid” child nodes. I want to use this this to return the “person” nodes whos “id” attribute matches the IDs stored in the list.

In simpler terms, the E4X equivalent of

SELECT person
FROM people
WHERE id IN (x,y,z,…)

I have no problem at all just looping through the collection and doing an E4X filter for each, I was just wondering if there’s a more elegant way of doing it.

Again, great articles – thanks!

I modified the addUniqueValue function a little so it will also deal with multiple child elements.

private function addUniqueValue(value:Object, list:XMLList):XMLList{
	for (var i:int=0;i<value.length();i++){
		if(!list.contains(value[i]))
		{
			list += value[i];
		}
	}
	return list;
}

I have some data that I separated into labels of a combobox:

—
Features3
Features1,Features2,Features3
Features2,Features3
Features1
—-
if (featuresCombo.selectedLabel != item.FEATURES)
return false;

return true;
—-

If you select ‘Features3’ for example it doesn’t return the selections that have multiple entries separated by commas.

Is there a way to filter based on the occurance of a string rather than matching the whole string?

I tried to use the (contains) function from above and was getting this error:Error #1123: Filter operator not supported on type mx.utils.ObjectProxy.

Thanks for any help.
-Auzzie

(your code and your xml file which I swear I did not change)

var filtered:XMLList = data.item;
var fields:Array = [{name: "source", value: "Amazon"}, {name: "price", value: "599.99"}];
       
var fieldCount:int = fields.length;
for(var i:int = 0; i <fieldCount; i++)
{
    var fieldName:String = fields[i].name;
    var fieldValue:String = fields[i].value;
    filtered = filtered.(child(fieldName) == fieldValue);
	trace(filtered);
}

this code is supposed to return Amazon items worth 599.99, however it returns 3 Amazon items. It's returning 2-599.99 items and 1-399.99 item which is not what's in the xml file.

output results

Amazon
399.99

Amazon
599.99

Amazon
599.99

I’m new to xml and AS3 so I wanted to make sure this wasn’t happening because I’m using Flash CS4 (since your original post is almost 3 years old)

However, you might also look at contains() on XMLList. It might be useful here. I’ve never played with that one, though.