我是一名JavaScript初学者。我想用JavaScript来浏览DOM中的所有元素并打印它的名字,我写了下面: function getNumber(parent){
var entiredoc = parent;
var docnodes = entiredoc.childNodes;
return docnodes.length;
我遇到了一个有趣的问题。有一个目录树让呼叫T 现在在目录结构中有3个操作是允许 1. Add a file or another directory under some parent directory
2. Remove a file or another directory
3. Modify that is move a file/directory from one parent d
在列表树的落叶归我到目前为止这样的代码: data BinaryTree a = Null | Node a (BinaryTree a) (BinaryTree a)
treeLeaves :: BinaryTree a -> [a]
treeLeaves tree = case tree of
Null -> []
Node v t1 t2 -> [] ++ tr