tree | 易学教程

Nesting array based on level

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问题 0: {content: "Heading 1 2 3 4 5", level: 2, anchor: "heading-1-2-3-4-5", className: "testtest", fontWeight: "", …} 1: {content: "Heading 2", level: 2, anchor: "heading-2", fontWeight: "", textTransform: "", …} 2: {content: "Inner Heading", level: 2, anchor: "inner-heading", fontWeight: "", textTransform: "", …} 3: {content: "Heading Level 3", level: 3, anchor: "heading-level-3", fontWeight: "", textTransform: "", …} 4: {content: "Heading Level 3-2", level: 3, fontWeight: "", textTransform: ""

What is the difference between tree depth and diameter?

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问题 Hi Im little confused with the difference between the depth and the diameter of a tree.Sorry if Its already asked but I couldn't find it. 回答1: The depth of a node is the number of edges from the node to the tree's root node. A root node will have a depth of 0. The height of a node is the number of edges on the longest path from the node to a leaf. A leaf node will have a height of 0. The diameter (or width ) of a tree is the number of nodes on the longest path between any two leaf nodes. The

Cannot Resolve Method when using generics

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问题 I am trying to implment a tree for my project. This tree will contain nodes which are different board states after some move. Right now my project is structured like so: src Agent Support Test Threes Tree.java Some class.java some class Board.java I want my tree to store these Board objects kept in package src.Threes. However in my Tree class it is not letting me access my public board methods. I am confident that I am just missing some really basic thing but I cannot figure this out after

Python, not able to graph trees using graphviz with the anytree package

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问题 So I have installed the anytree package (after great effort; I had to add some environment variables on my system). Having done this I can use almost all functionalities of the anytree package - just not the one I want. I wish to use graphviz in conjunction with the anytree package in order to graph trees using the 'DotExporter' command. I have installed graphviz; its path is C:\Users\joel\Anaconda3_2\Lib\site-packages\graphviz, and I have also added the line of code 'from anytree.exporter

Create a tree structure from a graph

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问题 I'm trying to find the right approach to graphing a dataset that contains information on amount of time users typically spend in various locations. Importantly, there are categories and subcategories with increasing levels of granularity to my data (for example, 60% of people are at "home", and of those 40% are in the "living room"). I am aware of TreeMaps which would display the information and relationships I need, but I have been asked to make a "network" visualization of the data. What I

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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学习数据结构 AVL树

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前一篇学习了二叉搜索树，本篇试图学习 AVL 树。可惜的是，Mehta 教授的《数据结构基础》一书中没有给出删除算法，我还没研究清楚，只好先不写（学）删除部分了。修改后的 TestTree.java 文件在这里： http://vdisk.weibo.com/s/3fAzF 以下是 insert 部分的代码，注释我已经写得挺清楚的了： public void insert(K key, V value) { this.checkValid(); // 检查现在树的有效性。 internal_insert(key, value); // 实际执行插入。 this.checkValid(); // 插入之后再检查一次。 } /** 内部实现 insert, 返回插入或更新的节点对象。 */ private boolean internal_insert(K key, V value) { if (this.root == null) { // 特定情况，简单处理。 this.root = new TreeNode<K,V>(key, value); return true; } // 第一步：查找 key 的插入位置。 boolean found = false; TreeNode<K, V> a = root, // 离插入点最近的 bf=+-1 的节点，也可能为 root(其

Does every matrix correspond to a graph conceptually?

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问题 I understand there are 3 common ways to represent graphs: Adjacency Matrix Adjacency List Edge list That said, problems I’ve solved on LeetCode often use matrices and the solution requires DFS or BFS. For example, given the matrix below, find if a target string exists when you go left, right, up, and down (but not diagonal). [ [‘a’,‘p’,’p’], [‘e’,’a’,’l’], [‘r’,’t’,’e’] ] This required a DFS approach. Is this because this matrix represents a graph or does DFS and BFS apply to matrices too and

tree from array of dot-separated strings

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问题 I have an array of dot delimited strings which looks like the following data = [ 'Europe.UK.London.TrafalgarSq', 'Europe.UK.London.HydePark', 'Europe.UK.London.OxfordStreet', 'Europe.UK.London.City.Bank', 'Europe.France.Paris', 'Europe.France.Bordeaux'}, ] and I want to build the following tree of of nested objects. In case it matters, this is for a leaflet map where the Tree Layers Control is going to be used var tree = { label: 'Places', selectAllCheckbox: 'Un/select all', children: [ {