我是一名JavaScript初學者。我想用JavaScript來瀏覽DOM中的所有元素並打印它的名字,我寫了下面: function getNumber(parent){
var entiredoc = parent;
var docnodes = entiredoc.childNodes;
return docnodes.length;
我遇到了一個有趣的問題。有一個目錄樹讓呼叫T 現在在目錄結構中有3個操作是允許 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
在列表樹的落葉歸我到目前爲止這樣的代碼: 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