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Preface Mybatis is a data persistence framework commonly used in web Engineering development. Through this framework, it is very easy for us to add, delete and check the database. When database connection commits transactions, it consumes a lot of resources. If more updated data are inserted and only one data is submitted per transaction, it w ...

The method originated from optimizing the code structure, but its significance is not limited to this. Because of the method definition, the programming language is more like a tool to solve practical problems, rather than just a calculator that can only be used for addition, subtraction, multiplication and division. In the development of mathe ...

API prop() and attr() prop() Method used to change impact DOM Dynamic state of elements, not change HTML Attribute. For example: disabled,checked val() Set or return the values of form elements (input, select, textarea) width() and height() Setting or getting the width and height of the matching element returns number (without units), while $(s ...

Template: Template is used to adapt to generic programming. Generic programming is to write type-independent code, and it is a means of code reuse. Template is the basis of generic programming. template function 1. concept Template functions represent a family of functions, which are not related to the class's idea, and are ...

1. Definition of function What is a function? Functions are a small piece of independent code defined in a class with specific functions, also known as methods. Function format: The name of the modifier return value type function (parameter type parameter 1, parameter type parameter 2,...){ Function execution code; Retur ...

Many programming languages have two ways to pass parameters to methods -- by value and by reference.   Unlike other languages, Java does not allow programmers to choose whether to pass parameters by value or by reference. Variables of the basic type (byte--short--int--long--float--double--boolean--char) are always passed by value. As far as o ...

When using JavaScript, we often need to deal with many conditional statements. Here are five tips to help you write better / clearer conditional statements. 1. Use Array.includes to handle multiple conditions Let's look at the following examples: // condition function test(fruit) { if (fruit == 'apple' || fruit == 'strawberr ...

Re-entrant locks in a broad sense refer to locks that can be called repeatedly and recursively. After using locks outside, they can still be used inside, and deadlocks do not occur (provided they are the same object or class). Such locks are called re-entrant locks. Re-lockable: ReentrantLock and synchronized are re-entrant locks. Here is an ...

Catalog Threads in Java How to Create Threads in Java Thread synchronization in Java (lock, wait,notify,notifyall) Synchronization and atomic operation of guaranteeing access to member variables in Java How to Terminate Threads in Java Threads in Android Communication between threads Handler,Looper,MessageQueue ThreadLo ...

This article needs to use Java's reflection knowledge. If you have a partner who is not clear about reflection, you can step here first. Java Advancement-Reflection. Programming ideas come from life, and "agent" is very common in life. For example, when we buy something, we usually don't buy it directly from the factory, ...