[flexcoders] Dynamic evaluation of E4X expression

[xhanin]

Hi,

I find the E4X expression language very powerful, and would like to
leverage it to find elements in an xml document.

The problem is that I get the E4X expression at runtime, so I'm
looking for a way to dynamically invoke the E4X expression.

Something like:
------------------------------
var myXML:XML = 
    <order>
        <item id='1'>
            <menuName>burger</menuName>
            <price>3.95</price>
        </item>
        <item id='2'>
            <menuName>fries</menuName>
            <price>1.45</price>
        </item>
    </order>;
var expression:String = "item.(@id==2).menuName";

myXML.<something here?>(expression);
------------------------------

I first look for an eval function as in javascript, but found that AS3
does not provide such function any more.

- Xavier