Programmer Think

1, IntroductionHashMap's source code, which we have interpreted before, is an array plus a linked list. If the linked list is too long, it will split into a red black tree. The automatic capacity expansion mechanism is not detailed. Let's take a look at it in detail today2, Capacity expansion mechanismLet's start with the conclusion:The capacit ...

A 4-node rac of a provincial power system and a 2-node crash in the morning.Wed Nov 03 07:59:05 2021 SMON: Restarting fast_start parallel rollback Exception [type: SIGSEGV, Address not mapped to object] [ADDR:0x505E9323] [PC:0x98214CA, kgegpa()+40] [flags: 0x0, count: 1] Exception [type: SIGSEGV, Add ...

What is bubble sorting Bubble Sort is the most basic exchange sort. Everyone must have drunk soda. There are often many small bubbles floating on it. This is because the carbon dioxide that makes up small bubbles is lighter than water, so small bubbles can float upward bit by bit. The basic idea of Bubble Sorting is to compare the values of ...

We will use a series to explain the complete practice of microservices from requirements to online, from code to k8s deployment, from logging to monitoring. The whole project uses the micro services developed by go zero, which basically includes go zero and some middleware developed by relevant go zero authors. The technology stack used is bas ...

1, IntroductionFacial analysis in photos has attracted extensive attention because it can help us solve various problems, including better customer advertising positioning, better content recommendation system, security monitoring and other fields.Age and gender are important aspects of facial features and their identification is a prerequisite ...

In this issue, we will learn how to use computer vision technology to recognize chess pieces and their positions on the chessboardWe use computer vision technology and convolutional neural network (CNN) to create a classification algorithm for this project and determine the position of chess pieces on the chessboard. The final application will ...

prefaceHello, I'm Lin Sanxin. The most difficult knowledge point in the most easy to understand words is my motto. The foundation is advanced, and the premise is my original intentionPromise encapsulation requestIf you usually use Promise to encapsulate the request, when you use this request function:// Encapsulation request function const requ ...

Previously on: I also need PCL_ ROS and PCL, in which PCL is installed_ ROS is to supplement two packages after installing ROS: PCL conversions PCL_ ROS, and then install PCL separately. If you use the classical method Ubuntu18.04 installing PCL (detailed tutorial) If PCL is installed, it will lead to the conflict of VTK package, that is, PCL ...

1. Introduction to spring IOC IoC: inversion of control. In the traditional development mode, developers create and manage objects by themselves. When the Spring framework is used, these things are handed over to the framework. It can be understood that "the management right of developers over objects to the framework". Therefore, th ...

B/S and C/S architecture B/S: Browser / server, which interacts with the server based on the browser program C/S: client / server, which interacts with the server based on the client program Java write server program 1. Meet business needs 2. Handle high concurrency 3. Big data processing Network protocol Syntax: structure of ...