我这样做很多次了,但现在我想的东西.... 我通过寻找一个属性的值寻找一个节点。
I've done this lot of times, but now I'm missing something.... I'm searching for a node by looking for a value in an attribute.
如果我尝试跟踪:
xmlQuestStructure.page[activePageIndex].label.@priority
跟踪它的确定,我可以读高,中,低(该值我很期待)。
The trace it's ok, and I can read High, Medium, Low (the values I'm expecting).
但是,如果我尝试跟踪该(其中calculatedPriority是价值高,中,低字符串)
But if I try to trace this (where calculatedPriority is a String with value High, Medium or Low)
xmlQuestStructure.page[activePageIndex].label.(@priority == calculatedPriority)
我得到的ReferenceError:错误#1065:变量的优先级没有定义
I get ReferenceError: Error #1065: Variable priority is not defined
我是什么做错了吗? THX您的帮助!
What am I doing wrong? Thx for your help!
最有可能的,你的问题是,你的标签节点之一的不有一个优先级属性定义。当您使用 @ 在E4X,它会如果涉及到不具有的属性指定的XML节点抛出一个错误。
Most likely, your problem is that one of your label nodes DOESN'T have a priority attribute defined. When you use @ in e4x, it will throw an error if it comes to a XML node that doesn't have the attribute specified.
如果有可能,你的XmlNode的本来属性被忽略,那么而是采用'@',用属性()
。
If there is a possibility that your XMLnode could have the attribute omitted, then instead of using '@', use attribute()
.
所以,你的情况,你可以这样做:
So in your case, you could do this:
xmlQuestStructure.page[activePageIndex].label.(attribute("priority") == calculatedPriority);
使用属性()
则较为被动,并会忽略节点,如果它不具备的,而不是抛出一个错误指定的属性。
using attribute()
is more passive, and will ignore the node if it doesn't have the specified attribute, instead of throwing an error.