checking an empty XML, XMLList or XMLListCollection in flex4

Question

如何检查Flex4中的XML，XMLListCollection或XMLList是否没有元素或包含至少一个或多个元素？

Answer 1

How about using the contains() method ?

sample from docs:

var xml:XML = 
        <order>
            <item>Rice</item>
            <item>Kung Pao Shrimp</item>
        </order>;
trace(xml.item[0].contains(<item>Rice</item>)); // true
trace(xml.item[1].contains(<item>Kung Pao Shrimp</item>)); // true
trace(xml.item[1].contains(<item>MSG</item>)); // false