How can I dynamically edit XML node values in ActionScript?

Question

/* I start with this: */

<Report>
    <prop1>4</prop1> 
    <prop2>2255</prop2> 
    <prop3>true</prop3> 
    <prop4>false</prop4> 
    <prop5>true</prop5> 
</Report>

/* I want this result (change the value of node "prop5"): */

<Report>
    <prop1>4</prop1> 
    <prop2>2255</prop2> 
    <prop3>true</prop3> 
    <prop4>false</prop4> 
    <prop5>false</prop5> 
</Report>

/* I tried this: */

var reportXML:XML = 
    <Report>
        <prop1>4</prop1> 
        <prop2>2255</prop2> 
        <prop3>true</prop3> 
        <prop4>false</prop4> 
        <prop5>true</prop5> 
    </Report>;

var myArray:Array = [{xmlNodeName: "prop5", value: false}];

for each (var item:Object in myArray)
{
    report.xml[item.xmlNodeName] = item.value.toString();
}

/* But this just adds a new node, resulting in this: */

<Report>
    <prop1>4</prop1> 
    <prop2>2255</prop2> 
    <prop3>true</prop3> 
    <prop4>false</prop4> 
    <prop5>true</prop5> 
    <prop5>false</prop5> 
</Report>;

Answer 1

This seems to be doing exactly what you want. It's just your code with some typos fixed.

        var reportXML:XML = 
            <Report>
                <prop1>4</prop1> 
                <prop2>2255</prop2> 
                <prop3>true</prop3> 
                <prop4>false</prop4> 
                <prop5>true</prop5> 
            </Report>;

        var myArray:Array = [{xmlNodeName: "prop5", value: false}];

        for each (var item:Object in myArray)
        {
            reportXML[item.xmlNodeName] = item.value.toString();
        }

        trace(reportXML);