Tag：tree structure
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Time：2021-1-13
When developing spring cloud Alibaba microservice application, mysql, redis and Nacos should be set up first. In this paper, docker is used; There are many ways to deploy Nacos. See the official document: Nacos docker, which uses the stand-alone mode and MySQL mode, so it will be associated with MySQL; docker- compose.yaml The definition file […]
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Time：2020-12-24
Author: little brother FuBlog:https://bugstack.cn Precipitation, sharing, growth, let yourself and others can have a harvest! 1、 Preface Reasonable 5 years of development, no use of data structure, you are just doing crud! Most of the time, most programmers suffer from slow query, low efficiency and a lot of associated SQL. The main reason is that […]
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Time：2020-11-8
##I’ve been busy these two days, but I still need to summarize the relevant holes. I hope that my brothers will carefully use the tree structure plug-in in in amazeui ##Then I will briefly talk about our company’s front-end applications: the UI framework is amazeui (commonly known as sister), and the interaction framework is JQ. […]
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Time：2020-9-28
1、 Preface Red black tree is an efficient self balanced binary search tree Rudolf Bayer invented the red black tree in 1978, which was calledSymmetric binary B-trees。 Later, in 1978, it was modified by Leo J. guibas and Robert Sedgewick to the present dayRed and black trees。 The red black tree has good efficiency, which […]
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Time：2020-9-23
1、 With as common table expression It is similar to view, but does not create an object. With as common table expression does not create an object and can only be followed by a select statement 1. Realize recursive query (tree structure) 2. The common table expression can be referenced multiple times in a statement […]
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Time：2020-9-15
As shown in the figure below, a tree structure visualization data graph is needed in recent projects. Many visual plug-ins were found, but no available ones were found. So I drew one myself. The code is as follows. The tree branch is the data rendering returned by the back-end interface, which can display multiple data; […]
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Time：2020-1-17
The essence of the tree is that many pieces of data are displayed in layers according to certain internal relations. Therefore, each piece of data includes data items and interrelations. The data item corresponds to the column in the tree, and the relationship corresponds to which item should be displayed. In pyqt5, there are two […]
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Time：2020-1-7
Tree structure assembly import { Component, Input } from ‘@angular/core’; @Component({ selector: ‘app-tree’, templateUrl: ‘./tree.component.html’, styleUrls: [‘./tree.component.scss’] }) export class TreeComponent { //Super simple, focus: receive superior value //You can establish an interface for the tree, which is simplified as any @Input() treelists: any //Click action itemClick(i) { //Set up a service to receive the […]
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Time：2019-12-14
Since vuex can be used, there must be an install method inside, so we need to implement an install method first. When we use it, there is a this. $store attribute on each component, which contains the state, transitions, actions and getters in the state warehouse. Therefore, we need to mount a $store attribute on […]
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Time：2019-12-8
The front There are not many aspects of data structure design in the front-end. The most common one is toSome operations of tree structure。 In a sense, front-end work itself is a work direction of dealing with tree structure. After all,DOM is a natural tree structure。 So how to operate the tree structure well is […]
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Time：2019-8-31
Here is a simple example of Family Tree: Copy codeThe code is as follows: DECLARE @TT TABLE (ID int,Relation varchar(25),Name varchar(25),ParentID int) INSERT @TT SELECT 1,’ Great GrandFather’ , ‘Thomas Bishop’, null UNION ALL SELECT 2,’Grand Mom’, ‘Elian Thomas Wilson’ , 1 UNION ALL SELECT 3, ‘Dad’, ‘James Wilson’,2 UNION ALL SELECT 4, ‘Uncle’, ‘Michael […]
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Time：2019-8-25
After searching for a long time, I finally found out how to display tree’s command on the terminal under mac. As a person who turns from linux, I haven’t adapted to mac’s finder yet. I prefer to view files on the command line.Order: Copy code The code is as follows: find . -print | sed […]
