Programmer Group

1. One way one to many configuration One way one to many is configured with the @ OneToMany tag. One party has a Set attribute associated with multiple parties. A Set can be a List or a Set, but the difference is that a List is ordered and a Set is not repeated. Corresponding to the configuration of @ OneToMany on one side: /** * One way one ...

MVVM concept MVVM represents Model-View-ViewModel. Model: Model layer, responsible for handling business logic and interacting with the server side View: View layer: responsible for converting data models into UI displays, which can be easily understood as HTML pages ViewModel: The View Model layer that connects Models to Views and ser ...

Generate asynchronous tree 1. Generate an empty tree, which is usually placed in the west module using easyui layout<ul id="menuTree" class="easyui-tree"> 2. To obtain node information from the server, the json data returned by the backend must contain the following attributes: pid (parent node id), id, text, state, url. be careful!!! ...

Common data structures 1, String (string) 1. Basic use Create string # Create string str1 = str("lucky is a good man") # The basic type string will automatically change to string object type when used str1 = 'lucky is a nice man' operation # String operation str3 = "lucky is a cool man" str4 = "lucky is a handsome man" # String addition (s ...

Catalog 1.logback Composition of configuration file 1.1 rootnode 1.2.property node 1.3.appender node 1.3.1 ch.qos.logback.core.ConsoleAppender 1.3.2 ch.qos.logback.core.FileAppender 1.3.3 ch.qos.logback.core.rolling.RollingFileAppender 1.3.4 ch.qos.logback.classic.AsyncAppender 1.3.5 rollingPolicy 2. Examples of configuration files 3 s ...

#jQuery animation -1. Hide -2.show() display ```js $('. demo').show(3000, 'swing');//width height opacity padding operates on these parameters simultaneously ``` -3.toggle() is hidden to show the operation -4.fadeIn() fade in, transparency from 0-1 -5.fadeOut(), transparency from 1-0 -6.fadetoggle() fade in, fade out operation -7.fadeTo() ...

spring framework integration quartz @Scheduled Spring context support has two annotations for Scheduled tasks under spring, @ enablescheduled and @ Scheduled, which are easy to use 1. Add enableschedule where spring can scan @SpringBootApplication @MapperScan("com.hsm.quartztask.mapper") @EnableScheduling public class QuartzTaskApplication { ...

Previous As we all know, inheritance is a common feature of all OO languages. In JavaScript, its inheritance mechanism is very different from other OO languages. Although ES6 provides us with the same syntax sugar as object-oriented inheritance, its bottom layer is still a constructor, so it is very important to understand the underlying princ ...

1, Improve the game procedures and test the game procedures. Change the end of the code slightly. If the code is correct, run it. Otherwise, output Error. from random import random #Printer introduction def printIntro(): print("19 Deng Ruoyan, No. 23, Xinji class 2") print("This program simulates two players A and B Table tennis comp ...

1, Double underline If you want internal properties not to be accessed externally, you can add two underscores to the name of the property. In Python, if the variable name of an instance starts with \\\\\\\\\\. Are instance variables starting with double underscores necessarily inaccessible from outside? Not really. The reason why you can't dir ...