Table of Contents I. Introduction 2. const member function const modified member function of the class Question 1 Question 2 Frequently asked interview questions for const member functions (key points!!) Address-taking and const address-taking operator overloading 3. Encouragement 1. Foreword In the class we studied earlier, we will define member variables and member functions. These […]
Tag: fault
Multivariate classification\Optimizing BP neural network based on Sparrow algorithm to realize fault diagnosis with matla implementation
?About the author: A Matlab simulation developer who loves scientific research. He cultivates his mind and improves his technology simultaneously. For code acquisition, paper reproduction and scientific research simulation cooperation, please send a private message. Personal homepage: Matlab Research Studio Personal credo: Investigate things to gain knowledge. For more complete Matlab code and simulation customization […]
Spring’s @FieldDefaults and @Data: Lombok annotations for cleaner code
Introduction As Java developers, we often find ourselves stuck in boilerplate code. Accessor methods, modifier methods, constructors, equals(), hashCode(), and toString() are essential, but take up a lot of space and distract from the core logic of the application. The Spring framework is widely used for building enterprise applications and is a fan of reducing […]
Modify the default MySQL library of cloud package iPortal to POSTGRESQL
Author: John Modify the default MySQL library of cloud package iPortal to POSTGRESQL 1. View iPortal’s configuration persistence directory (iportalOPTs) 2. Modify iportal monitor monitoring 3. Modify iPortal database configuration information 3.1 Modify iPortal database configuration information 3.2 Modify iPortal security database configuration information 3.3 Modify the command executed when the container is started in […]
Asynchronously process CompletableFuture data operations and use DefaultTransactionDefinition to ensure transaction consistency
package *.utils; import lombok.extern.slf4j.Slf4j; import org.springframework.transaction.PlatformTransactionManager; import org.springframework.transaction.TransactionStatus; import java.util.concurrent.CountDownLatch; import java.util.concurrent.atomic.AtomicBoolean; @Slf4j public class ThreadTransationUtil { private final PlatformTransactionManager transactionManager; public ThreadTransationUtil(PlatformTransactionManager transactionManager) { this.transactionManager = transactionManager; } public void threadBlocking(CountDownLatch latch, TransactionStatus status, AtomicBoolean isException) throws InterruptedException { latch.countDown(); log.info(“Start hovering, remaining count: {}”, latch.getCount()); latch.await(); if(isException.get()){ log.info(“Start rollback”); transactionManager.rollback(status); }else{ log.info(“Start submission:{}”,status); […]
Several default member functions of classes in C++
Several default member functions of classes in C++ 1. Constructor The constructor is a special member function. The name is the same as the class name. It is automatically called by the compiler when creating a class type object to ensure that each data member has an appropriate initial value and is stored in the […]
c++ default member function
Table of Contents default member function 1. Constructor 1.1 Concept of constructor 1.2 The constructor you wrote and how to call it 1.2.1 Date implementation 1.2.2 Implementation of stack 1.3 Default constructor generated by the compiler 1.3.1 Date implementation 1.3.1 Implementation of stack 1.3.3 Implementation of queue (two stacks implement one queue) 2. Destructor 2.1 […]
Equipped with Android5.1 based on RK3229 to modify the default desktop Launcher at startup
1. Find ActivityManagerService.java Find the ActivityManagerService.java file in the ..\rk3229_5.1_box\frameworks\base\services\core\java\com\android\server\am directory. Find setDefaultLauncher in the startHomeActivityLocked function in the file. boolean startHomeActivityLocked(int userId, String reason) { setDefaultLauncher(userId); if (mFactoryTest == FactoryTest.FACTORY_TEST_LOW_LEVEL & amp; & amp; mTopAction == null) { // We are running in factory test mode, but unable to find // the factory test […]
C++6 default member functions (in classes and objects)
Table of Contents default member function 1. Constructor 1.1 Concept of constructor 1.2 The constructor you wrote and how to call it 1.2.1 Date implementation 1.2.2 Implementation of stack 1.3 Default constructor generated by the compiler 1.3.1 Date implementation 1.3.1 Implementation of stack 1.3.3 Implementation of queue (two stacks implement one queue) 2. Destructor 2.1 […]
Preliminary C++ (2) Default parameters, references and inline functions
Introduction C++ is a powerful programming language with rich features to suit various programming needs. This article will introduce three important features in C++: default parameters, references, and inline functions. I will discuss their concepts, features, and usage scenarios in detail, illustrating them with code and comments. 1. Default parameters 1.1 Default parameter concept Default […]