Android drag and drop startDragAndDrop drag and drop Glide to flexibly load stacked rounded corners, Kotlin (6) Android drag and drop startDragAndDrop drag and drop Glide to load stacked rounded corners, Kotlin (5) – CSDN blog article has been read 1.3k times. Android DynamicGrid: Drag to swap positions. Android DynamicGrid is a third-party open source […]
Tag: lex
Network Programming (5) IO Multiplexing — epoll
1. Concept The full name of epoll is eventpoll, a notification mechanism based on event triggering. When the file descriptor read buffer is not empty, the read event is triggered. When the file descriptor write buffer is writable, the write event is triggered. 2. Principle The core data structure of epoll is: a red-black tree […]
Handwritten ThreadPoolExecutor thread pool
Many people don’t recommend making wheels, but I don’t. I built the wheel not to use it in a production environment, but to deepen my understanding. Why not? I personally think that making wheels is almost the best way to learn, if not even one. Because making a wheel requires doing at least the following […]
C language data structure-time complexity and space complexity
1. What are time complexity and space complexity? 1.1 Algorithm efficiency Algorithm efficiency analysis is divided into two types: the first is time efficiency, and the second is space efficiency. Time efficiency is called time complexity, while space efficiency is called space complexity. Time complexity mainly measures the running speed of an algorithm, while space […]
SpringBoot: SpEL makes complex permission control easy!
The path to growth as a programmer Internet/Programmer/Technology/Data Sharing focus on This article should take approximately 6 minutes to read. From: juejin.cn/post/7226674759626571833 1 Introduction 2 SpEL expression 3 Let’s do it Custom annotations Define aspects 4 Permission verification First, introduce SpEL: Then, get the expression we need from the annotation. Expression parsing Custom parsing method […]
Data structure-heap sort and its complexity calculation
Table of Contents 1. Heap sort 1.1 Adjust heap construction upward 1.2 Adjust heap construction downwards 2. Comparison of time complexity between two heap building methods 2.1 Adjust downward the time complexity of heap building 2.2 Adjust the time complexity of heap construction upward Topk problem In the previous section, we talked about Heap implementation, […]
[IO multiplexing] How EPOLL implements ET (edge trigger)
LT and ET edge-triggered What is edge triggering How to implement edge triggering Summary & Notes How to use recv & send for edge triggering recv return value of recv send level-trggered horizontal trigger code When we are doing epoll network programming, we can choose LT (horizontal trigger) or ET (edge trigger). By default, epoll […]
MATLAB writes a more complex checkers program
To create a complete, relatively complex checkers game program, we need to consider multiple aspects of the game, including the drawing of the board, the placement and movement of chess pieces, player interaction, the implementation of game rules, and the tracking of game states. The following MATLAB code provides a more complete implementation of the […]
SpringBoot: SpEL makes complex permission control easy!
This is a community that may be useful to you One-to-one communication/interview brochure/resume optimization/job search questions, welcome to join the “Yudao Rapid Development Platform” Knowledge Planet. The following is some information provided by Planet: “Project Practice (Video)”: Learn from books, “practice” from past events “Internet High Frequency Interview Questions”: Studying with your resume, spring blossoms […]
Three basic algorithms for sorting with time complexity n^2
Foreword: Bubble sort, selection sort, and insertion sort are all sorting algorithms with a time complexity of n^2. They are also the basis for us to learn other sorting algorithms later. Next, I will explain these three sorting algorithms to you in as much detail as possible. Time and optimization plan, if you have gained […]