HasValue is true if the node has a text value or false otherwise.
如果节点有文本值,hasvalue值为true;否则,值为false。
For example if the node-set is used in a Boolean context, the only processing needed is to test whether it is empty.
例如,如果该节点集在布尔型上下文中使用,唯一需要的处理就是测试它是否是空的。
This function returns an anonymous visitor function that will jump to the next node if the node is not of the correct type.
此函数返回一个匿名访问者函数,如果节点的类型不正确,则该函数将跳转到下一个节点。
You can go ahead and use that equation, or you could figure it out every time, because if you know the total number of nodes, and you know the angular node number, then you know how many nodes you're going to have left.
你们可以直接用这个方程,或者每次都自己算出来,因为如果你们知道了总的节点数,又知道角向节点数,就知道剩下的节点数是多少。
And also that we know that the zero does not count as a node, if per se I actually had managed to hit zero in drawing that, so the correct answer would be the bottom one there.
另外你们要知道零点不是节点,假设说我确实把零点画成0了,那正确的结果就是底下这个。
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