View gcc default macro definition

Basic commands Execute the gcc -E -dM test.c command to view the default macro definition of gcc on the current system, where test.c is a c source file with empty content. Extension Embedded gcc can add CPU parameters to see the default macro definition of gcc under the current compilation configuration, for example, execute the […]

ORM-1 field default value

When creating a new record on the odoo page, the front-end will call the default_get function of the back-end model through rpc to obtain the corresponding field default values based on the field list passed in by the front-end. #odoo/models.py @api.model def default_get(self, fields_list): “”” default_get(fields_list) -> default_values Return default values for the fields in […]

Java data structure (red-black tree) set collection HashSet HashSet three problems LinkedHashSetTreeSet TreeSet collection default rules sorting rules

Directory Data structure (red-black tree) red and black rules Red-black tree adding node rules set set summary HashSet Three problems with HashSet LinkedHashSet summary TreeSet TreeSet collection default rules Sorting rules (first sorting method) Method 2 practise Xiaolian Summarize Summary: How to choose when using collections Data structure (red-black tree) Red and black rules The […]

The SpringBoot project keeps jumping to the default Please sign in

1 Questions and screenshots Projects that are normally logged in suddenly keep jumping to the Please sign in page 2 When the code is started, the console below outputs a line Using generated security password: ec9fdd88-21cc-42b2-8fa1-62e1b810e7b5 At this point security is integrated into the project 3 Solution Just add annotations to the startup annotations so […]

[C++] Default member function of a class—-const member function (super detailed analysis)

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 […]

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); […]

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 […]