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DOM event flow To understand the event flow, we must first understand three points: Elements are not independent, they are connected in seriesAfter a single element triggers an event, it will affect other elementsMode of event flow: event capture (proposed by Netscape) and event bubbling (proposed by IE) Let's take the above figure as ...

Hello, I'm Xiaofu~ Technology exchange pays attention to official account: something inside programmers Portal: Original address Git should be familiar to everyone. Skillfully using git has become a basic skill of programmers. Although there are cow X client tools such as Sourcetree at work, which makes it convenient to merge code. But job i ...

SpringBoot-20-Mybatis code generation What is Mybatis? Mybatis is an open source project of apache ibatis, which was officially renamed mybatis in 2010. It is a Java persistence layer framework. The persistence layer framework provided by ibatis includes SqL Maps and Data Access Objects(Daos) Mybatis features: Mybatis is easy to learn: you ...

The user can trigger the program in any place with the help of the global shortcut key. However, the WinForms framework does not provide the function of global shortcut keys. To implement global shortcuts, you need to deal with the windows API. This article tells you how to use Windows API to use global shortcuts. Understand the message loop me ...

1, Basic query Syntax: select Query list from Table name; characteristic: 1,The query list can be fields, constant values, expressions and functions in the table 2,The result of the query is a virtual table database structure Employee table Department table Location table List of types of work USE ...

summary Each variation of the following code I tried didn't work – either DoSomething(): void or being called write or DoSomething(): Task and using taskex Runex() call, some attempts involve GetAwaiter(). Call getResult() Errors seen include: "Start may not be called on a Task with a null operation", "RunSynchronously may ...

  catalogue 1, Concept of form validation Form validation is one of JavaScript's advanced options. The form data verified by JavaScript include: 2, Common functions and events of form verification Common functions Common events 3, Regular Basic regularity Basic case Password level Login authentication 4, Secondary linkage ...

Demand background There are several reasons why multiple consumer instances need to be deployed in the project: Based on the reliability improvement requirements of the system. Especially for the container deployment scheme based on micro service architecture, multi instance deployment of micro service is the basic requirement to ensure the re ...

Common methods of Object Object.getPrototypeOf() Object. The getprototypeof method returns the prototype of the parameter object. This is the standard way to get prototype objects. var F = function () {}; var f = new F(); Object.getPrototypeOf(f) === F.prototype // true Prototypes of several special objects // The prototype of an empt ...

This article mainly records the process of using machine learning to solve the problems I encounter. catalogue 1, Problem description 2, Data processing 2.1 treatment of missing values 2.2 abnormal value handling 2.3 characteristic Engineering 3, Dimensionality reduction 4, Model establishment 5, Model training 1, Problem description ...