Programmer Group

This article contains a lot of code, which may be a bit rough. You can read it selectively. The purpose of this article is to simply analyze the principle of dynamic agent, to imitate JDK Proxy to write a dynamic agent and to summarize several agents. For the introduction and explanation of the agency model, there are many high-quality articles ...

Before introducing the use of HttpClient library, first introduce HttpURLConnection in jdk, because HttpClient is an open-source third-party library, which is convenient to use, but it is quite basic in jdk. Sometimes, when there is no HttpClient, HttpURLConnection in jdk can also be used. HttpURLConnection is the jdk java.net libr ...

The pit of PHP in_array ps: Should be the pit of weakly typed languages php document As the name implies, in_array is to find out whether a value is in an array. problem Assuming the scene of the accident The test code for an sql injection is as follows: $type = $_GET['type']; $types = [2,3,4,5,6]; if(!in_array($type, $types)) { throw new Para ...

[TOC] 1. Template introduction First, put the template link: https://github.com/ygqygq2/charts/tree/master/mod-chart This chart can be used as a general template for POD single image. All you need to do is replace the chart name with sed and modify README.md and NOTES.txt. Below, I will illustrate by copying this chart into an example-chart. [ ...

Our goal is to design a simple example of using splitters, following the interface of the Qt editor. Each window can change its size by mouse. The effect is shown in the figure above.   Using Designer to Realize 1. Open the Qt creator editor, create a new Qt Widgets Application project, select ...

Turn from https://javadoop.com/post/design-pattern Behavioral patterns Strategy mode Observer model Chain of Responsibility Model Template Method Patterns State mode Summary of Behavioral Model This series of articles will be sorted out into my Java Interview Guide warehouse on GitHub. For more interesting information, please visit my wareh ...

Use Node's hands to teach you how to write a tutorial website (follow the response style), including the front-end content and background management system, integration of Express framework and Monodb database server development; teach you how to use Vue.JS, ElementUI and iViewUI to write super beautiful pages. This project is originally create ...

brief introduction pinpoint is an open source APM monitoring tool on github. It is written in Java for large-scale distributed system monitoring. It has the smallest impact on performance (only about 3% increase in resource utilization), and the installation agent is non-intrusive. Major APM tools are almost based on this classic apper paper by ...

List Preview Website: Github | Githack | UNPKG | Gitee Github ranks Chinese users, the most ranked global warehouse Star, and generates page data through Github API v3. Preview of Ranking List More recently Is SegmentFault Hot in the Near Future,Developer's Headlines Lately Hot Sharing,36Kr Express Pre ...

Preface Charts are often used for data analysis in projects. There are many excellent open source galleries for charts on gitHub. Today, we share the bar charts in MPAndroid Chart. A brief introduction to MPAndroid Chart: It can realize the drag of charts, 3D, partial view, dynamic display of data and other functions. Official source address: ...