Programmer Group

    ROS 2 Foxy Fitzroy (hereinafter referred to as Foxy) was officially released on June 5, 2020. It is an LTS version and is supported until May 2023. This article is mainly based on the official compilation and installation tutorial [1] Complete and document any problems encountered during compilation. ...

1. Preface In the previous version, you mistakenly bound the build push docker image to the package execution action. As a result, the OSC service parent project will report an error that it cannot find the dependency during the install operation, and unacceptable problems such as "build the pus ...

1 Introduction This article will explain the creation and writing of cordova plug-ins in detail plugin.xml Configuration, aar+jar+so package configuration, static resource configuration, four components 2 start a simple cordova plug-in 2.1 initialize Cordova Plug-in Development Directory Ensure Cordova is installed before initialization cordova ...

brief introduction Privilege management is a necessary module in almost every system. If the project development needs to realize the right management every time, it will undoubtedly waste the development time and increase the development cost. As a result, the caspin library appears. Caspin is a powerful and efficient access control library. I ...

This article learns to use a Java client (Jedis / Lettuce) to operate Redis. 1 Open remote connection Redis does not support remote connections by default and needs to be turned on and modified manuallyRedis.confThere are three major changes: vi /usr/local/redis-5.0.8/redis.conf # bind 127.0.0.1 protected-mode no requirepass 123456 Then resta ...

Main references: https://www.jianshu.com/p/c2b589170379 catalog Basic configuration download Add ecrats dependency: Add gson application more ECharts is an open-source framework developed and provided by Baidu, which is mainly provided for the use of the Web. Therefore, WebView is generally used ...

preface With the rapid development of the Internet, more and more websites and apps appear on the market. We judge whether a software is easy to use, and user experience is an important measure. For example, we often use wechat, it takes more than ten seconds to open a page, and it takes a few minutes for the other party to receive a voice. I ...

0. Preface Qt3D is initiated by Nokia, and then improved by Digia and KDAB (the new version seems to be basically made by KDAB). It is a 3D image display and processing module based on OpenGL. Unfortunately, the data of Qt3D is relatively small, and with the version change, many online old Demo can' ...

preface Since there are not so many restrictions between internal services, the most simple and clear way is the most appropriate way. I prefer the way of using Dubbo. I separate the interface layer as the contract of the service. The server provides the service with this set of contract, and the client uses this set of contract to call the se ...

1: Background 1. Story telling Good news,. NET 5.0 finally released the fifth preview version on June 10, 2020. The sharp eyed students must have seen that in this version, C ා 9.0 is finally supported. Applause here, great!!! . Net5 official link It can be seen that the current C ා 9 is still a preview version, which implements some ne ...