treenode | 易学教程

how to go from TreeNode.FullPath data and get the actual treenode?

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问题 I would like to store some data from TreeNode.FullPath and then later i would like to re-expand everything up to that point. Is there a simple way of doing it? Thanks a lot! 回答1: I had a similar problem (but I just wanted to find the treenode again) and found this: http://c-sharpe.blogspot.com/2010/01/get-treenode-from-full-path.html i know it only answers part of your problem, but better than no replies at all ;) 回答2: You can write it as an extension method to the TreeNodeCollection : using

warning C4715: not all control paths return a value c++

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问题 i made two functions, one to find and return smallest key in a red - black tree and the other one returns a pointer to a particular node with that node's key as input.These functions work fine with all nodes except the nodes with the highest key and the lowest key.The program stops working and gives the C4716 warning . the keys are int array[] = { 50, 26, 45, 34, 23, 78, 84, 93, 14, 16, 100, 57, 62}; int Tree::findsmallest() { return findsmallestprivate(root); } int Tree::findsmallestprivate

Accessing object properties from a treenode that's associated with it?

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问题 Hallo, I have read Easy object binding to Treeview Node, but still have unanswered question. if an object is associated with treenode tag property, how to access that object members/properties from that treenode ? node1 = new TreeNode(); node1.tag = object1; //ex:if object1 has public property valueA //How to access valueA from node1 ?? 回答1: Maybe you can cast it back to the object1 type... var valueA = ((object1Type)node1.tag).valueA; 回答2: MyClass c = treeNode.Tag as MyClass; theValue = c

Why does “appendChild” moves a node?

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问题 I'm playing around with native javascript. I'm basically practicing basic node manipulations such -- add, remove, move, copy, and create. While testing move, I got a question. http://jsfiddle.net/sJg7E/ if you look at the jsfiddle above, I've used "appendChild". How come it moves a node to a new div? I know that I need to clone a node if I want to copy a node. It just doesn't look/sound right with "appendChild" command. Is this expected behavior? 回答1: A node can only have one parent.

Find the maximum depth of a tree

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问题 I have a tree data structure with N first-level child nodes that have childs too. For example: Root Node1 Node11 Node111 Node1111 Node12 Node2 Node21 Node211 I would like to know which of the braches has the biggest depth. As in the previous example it will be Node1 - Node11 - Node111 - Node1111 that has a depth of four levels. Any suggestion? Thanks! 回答1: You must check all nodes. Several months ago I implemented this algorithm in this way: class Node { public String Name { get; private set;

Find the maximum depth of a tree

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【LeetCode】TreeNode类实现解析（java实现）

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在LeetCode中，TreeNode是经常用到的一个结构体，表示数据结构树（Tree）中的一个节点。其官方定义如下： public class TreeNode { int val; TreeNode left; TreeNode right; TreeNode(int x) { val = x; } } 　　在Tree的题目中，常会给出一些测试用例，用一些特定的格式来表示一棵树，如[3,9,20,null,null,15,7]就表示如下的一棵树： 3 / \ 9 20 / \ 15 7 　　因此，我扩展了一下这个TreeNode的一些实现，使其可以通过官方给出的格式方便的构建出一棵树，从而使得我们在自己写玩代码后能很方便地调试。 package MakeLeetCodeClass; public class TreeNode { public int val; public TreeNode left; public TreeNode right; TreeNode(int x) { val = x; } public String toString(){ return Integer.toString(val); } // int []arr = {3, 9, 20, Integer.MAX_VALUE, Integer.MAX_VALUE, 15, 7}; private

Yii2 Show/Hide kartik treeview nodes

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问题 I am using Kartik Tree Manager. I am able to add, remove, update nodes. There is more requirement, that is to show/hide nodes on the basis of user access. i.e. when a user is given a specific node(s) then only that particular node(s) with all the child (if any) should be shown. What I have done so far? I have created a table user-node in which I am assigning a node id to a user as shown below What I want to do Now I want to show only the specified node with its child node only and hide other

What is a better way to model a treeNode?

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问题 What are the pros and cons of each of the following two ways to create a tree node? type TreeNode = | TreeNode of int * (TreeNode option) * (TreeNode option) * (TreeNode option) type Node = | Node of int * Node * Node | None 回答1: They are very close, but not entirely equivalent. You can actually reason about functional types quite nicely using mathematics (see for example my recent article), but you can see that even informally. Given any TreeNode(num, optLeft, optRight) , you can always

AVL Tree for Java

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问题 I'm not sure if I'm doing this correctly as this is my very first time coding with nodes. But here's my code so far, if someone can look over it and help me out with understanding if I'm doing anything wrong. Also my insert/remove methods are giving me a hard time. The professor gave us the pseudocode for that but I can't seem to grasp how to interpret it into Java code as I've never done this type of code before. Mostly because there's a if statement that checks the heights to see if the