how do I manipulate elements inside a xml in action script?

What are the inbuilt functions available in flex,actionscript that I can use 开发者_StackOverflow社区to find a node with a specific name inside xml variable and what functions could help me manipulate it? Something like Xquery in SQL! I dont want to use for loop everytime I want to manipulate a xml variable. For example, if I want to "cut" node inside this xml and add another attribute to it named enabled pro grammatically. Or how could I find "Find Next" node and delete it?

                 <menuitem label="Edit">
                    <m label="Cut"/>
                    <m label="Copy"/>
                    <m label="Paste"/>
                    <m type="separator"/>
                    <m label="Find"/>
                    <m label="Find Next"/>
                </menuitem>

Thanks guys.

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Actionscript supports e4x. Also, read about XML class.

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1) To find the "cut" node:

There's an easy way to find the "cut" node, but it'll require you to remove the <m type="separator" /> as it will throw an error with this code. To find it simply:

var cut:XMLList = xml.m.(@label == "Cut");

If you can't remove the "seperator" node, then you'll have to loop through to find it.

Once you have it, then to add a new attribute, it's simply:

cut.@someOther = true; // adds the attribute "someOther"

2) Deleting the "Find Next" node:

Deleting XML nodes in as3 is a bit awkward. You can try numerous ways, but you'll invariably end up with one error or another. See http://bottomupflash.wordpress.com/2008/03/26/deleting-xml-nodes-harder-than-it-looks/ for a bit more info.

The only piece of code that I could come up with that would delete the "Find Next" node is:

var i:int = 0;
for each( var x:XML in xml.m )
{
    if ( x.@label == "Find Next" )
        delete xml.m[i];
    i++;
}

Basically, we're looping through the structure, to find the index of the "Find Next" node, then we're deleting it using the child selector.