--- title: Learn Computing from the Experts | The Rheinwerk Computing Blog | Rheinwerk Computing (26) description: Rheinwerk Computing is an imprint of Rheinwerk Publishing and publishes books by leading experts in the fields of programming, administration, security, analytics, and more. (26) --- [![Rheinwerk Computing Logo](https://blog.rheinwerk-computing.com/hubfs/computing_logo-header.svg)](https://blog.rheinwerk-computing.com/) [Blog](https://blog.rheinwerk-computing.com) - Books - Get an overview of our wide selection of books on every relevant computing topic. - [General Computing](https://www.sap-press.com/rheinwerk-computing/general-computing/) - [DevOps](https://www.sap-press.com/rheinwerk-computing/devops/) - [Programming Languages](https://www.sap-press.com/rheinwerk-computing/programming-languages/) - [Security](https://www.sap-press.com/rheinwerk-computing/security/) - [Software Development](https://www.sap-press.com/rheinwerk-computing/software-development/) - Book Subscription - Get unlimited access to all Rheinwerk Computing books! - [Programming Subscription](https://sap-press.com/subscriptions/) ![](https://blog.rheinwerk-computing.com/hs-fs/hubfs/How%20to%20Write%20Your%20Own%20Python%20Functions.jpg?width=1000&name=How%20to%20Write%20Your%20Own%20Python%20Functions.jpg) [Featured](https://blog.rheinwerk-computing.com/tag/featured) | Featured article ## [How to Write Your Own Python Functions](https://blog.rheinwerk-computing.com/how-to-write-your-own-python-functions) Functions in Python provide functionality that you or someone else has already pro­grammed. In this post, we’ll teach you how to write your own Python functions. ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/how-to-write-your-own-python-functions) ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) **Rheinwerk Computing** Rheinwerk Computing is an imprint of Rheinwerk Publishing and publishes books by leading experts in the fields of programming, administration, security, analytics, and more. # Blogs by Rheinwerk Computing [![Using TaskExecutor in Spring](https://blog.rheinwerk-computing.com/hs-fs/hubfs/Using%20TaskExecutor%20in%20Spring.png?height=600&name=Using%20TaskExecutor%20in%20Spring.png)](https://blog.rheinwerk-computing.com/using-taskexecutor-in-spring) [Java](https://blog.rheinwerk-computing.com/tag/java) ## [Using TaskExecutor in Spring](https://blog.rheinwerk-computing.com/using-taskexecutor-in-spring) The asynchronous operations in the background must be executed by one entity. This is the job of an executor. ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/using-taskexecutor-in-spring) [![Learning to Program with Git Support](https://blog.rheinwerk-computing.com/hs-fs/hubfs/Learning%20to%20Program%20with%20Git%20Support.png?height=600&name=Learning%20to%20Program%20with%20Git%20Support.png)](https://blog.rheinwerk-computing.com/learning-to-program-with-git-support) [DevOps](https://blog.rheinwerk-computing.com/tag/devops) ## [Learning to Program with Git Support](https://blog.rheinwerk-computing.com/learning-to-program-with-git-support) Imagine you want to learn Python (or any other language). Over the course of a few weeks, you try out new functions and create various small sample... ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/learning-to-program-with-git-support) [![Docker Commands for Administration Purposes](https://blog.rheinwerk-computing.com/hs-fs/hubfs/Docker%20Commands%20for%20Administration%20Purposes.png?height=600&name=Docker%20Commands%20for%20Administration%20Purposes.png)](https://blog.rheinwerk-computing.com/docker-commands-for-administration-purposes) [DevOps](https://blog.rheinwerk-computing.com/tag/devops) ## [Docker Commands for Administration Purposes](https://blog.rheinwerk-computing.com/docker-commands-for-administration-purposes) This blog post provides an initial overview of docker commands you can use for the administration of your Docker system. ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/docker-commands-for-administration-purposes) [![What Is React?](https://blog.rheinwerk-computing.com/hs-fs/hubfs/What%20Is%20React.png?height=600&name=What%20Is%20React.png)](https://blog.rheinwerk-computing.com/what-is-react) [What Is?](https://blog.rheinwerk-computing.com/tag/what-is) ## [What Is React?](https://blog.rheinwerk-computing.com/what-is-react) React is a library for implementing web frontends. However, React only covers the view layer—that is, the representation of the user interface. ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/what-is-react) [![The Basic Principle of Using CSS](https://blog.rheinwerk-computing.com/hs-fs/hubfs/The%20Basic%20Principle%20of%20Using%20CSS.png?height=600&name=The%20Basic%20Principle%20of%20Using%20CSS.png)](https://blog.rheinwerk-computing.com/the-basic-principle-of-using-css) [HTML & CSS](https://blog.rheinwerk-computing.com/tag/html-css) ## [The Basic Principle of Using CSS](https://blog.rheinwerk-computing.com/the-basic-principle-of-using-css) To use the CSS principle so that it makes sense, you should first create the HTML document with logical and semantic HTML elements. ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/the-basic-principle-of-using-css) [![Auditing with Spring](https://blog.rheinwerk-computing.com/hs-fs/hubfs/Auditing%20with%20Spring.png?height=600&name=Auditing%20with%20Spring.png)](https://blog.rheinwerk-computing.com/auditing-with-spring) [Java](https://blog.rheinwerk-computing.com/tag/java) ## [Auditing with Spring](https://blog.rheinwerk-computing.com/auditing-with-spring) When accessing databases, it’s occasionally important to determine who made a change to an entity and when. The recording of this metadata is called *...* ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/auditing-with-spring) [![The Most Important Terms and Concepts of the React World](https://blog.rheinwerk-computing.com/hs-fs/hubfs/The%20Most%20Important%20Terms%20and%20Concepts%20of%20the%20React%20World-1.png?height=600&name=The%20Most%20Important%20Terms%20and%20Concepts%20of%20the%20React%20World-1.png)](https://blog.rheinwerk-computing.com/the-most-important-terms-and-concepts-of-the-react-world) [JavaScript](https://blog.rheinwerk-computing.com/tag/javascript) ## [The Most Important Terms and Concepts of the React World](https://blog.rheinwerk-computing.com/the-most-important-terms-and-concepts-of-the-react-world) Development of a React application is sometimes very different from that of traditional web applications. ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/the-most-important-terms-and-concepts-of-the-react-world) [![How to Make Web Tables Accessible for Everyone](https://blog.rheinwerk-computing.com/hs-fs/hubfs/How%20to%20Make%20Web%20Tables%20Accessible%20for%20Everyone.png?height=600&name=How%20to%20Make%20Web%20Tables%20Accessible%20for%20Everyone.png)](https://blog.rheinwerk-computing.com/how-to-make-web-tables-accessible-for-everyone) [HTML & CSS](https://blog.rheinwerk-computing.com/tag/html-css) ## [How to Make Web Tables Accessible for Everyone](https://blog.rheinwerk-computing.com/how-to-make-web-tables-accessible-for-everyone) Basically, the HTML elements available for defining tables are semantic elements. ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/how-to-make-web-tables-accessible-for-everyone) [![The Component Lifecycle in React](https://blog.rheinwerk-computing.com/hs-fs/hubfs/The%20Component%20Lifecycle%20in%20React.png?height=600&name=The%20Component%20Lifecycle%20in%20React.png)](https://blog.rheinwerk-computing.com/the-component-lifecycle-in-react) [Software Development](https://blog.rheinwerk-computing.com/tag/software-development) ## [The Component Lifecycle in React](https://blog.rheinwerk-computing.com/the-component-lifecycle-in-react) When you implement components in React, situations can occur in which you have to intervene in the component's lifecycle at different points in time. ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/the-component-lifecycle-in-react) [![What Is a Bug Bounty Program?](https://blog.rheinwerk-computing.com/hs-fs/hubfs/What%20Is%20a%20Bug%20Bounty%20Program.png?height=600&name=What%20Is%20a%20Bug%20Bounty%20Program.png)](https://blog.rheinwerk-computing.com/what-is-a-bug-bounty-program) [What Is?](https://blog.rheinwerk-computing.com/tag/what-is) ## [What Is a Bug Bounty Program?](https://blog.rheinwerk-computing.com/what-is-a-bug-bounty-program) A *bug bounty program* is an established method of reporting security vulnerabilities to companies for several years running. ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/what-is-a-bug-bounty-program) - - [1](https://blog.rheinwerk-computing.com/author/rheinwerk-computing/page/1) - [...](https://blog.rheinwerk-computing.com/author/rheinwerk-computing/page/21) - [24](https://blog.rheinwerk-computing.com/author/rheinwerk-computing/page/24) - [25](https://blog.rheinwerk-computing.com/author/rheinwerk-computing/page/25) - [26](https://blog.rheinwerk-computing.com/author/rheinwerk-computing/page/26) - [27](https://blog.rheinwerk-computing.com/author/rheinwerk-computing/page/27) - [28](https://blog.rheinwerk-computing.com/author/rheinwerk-computing/page/28) - [...](https://blog.rheinwerk-computing.com/author/rheinwerk-computing/page/29) - [29](https://blog.rheinwerk-computing.com/author/rheinwerk-computing/page/29) - ### Blog Topics - [All Topics](https://blog.rheinwerk-computing.com) - [Programming Languages](https://blog.rheinwerk-computing.com/tag/programming-languages) - [How To](https://blog.rheinwerk-computing.com/tag/how-to) - [DevOps](https://blog.rheinwerk-computing.com/tag/devops) - [Featured](https://blog.rheinwerk-computing.com/tag/featured) - [JavaScript](https://blog.rheinwerk-computing.com/tag/javascript) - [Cybersecurity](https://blog.rheinwerk-computing.com/tag/cybersecurity) - [What Is?](https://blog.rheinwerk-computing.com/tag/what-is) - [Artificial Intelligence](https://blog.rheinwerk-computing.com/tag/artificial-intelligence) - [Web Development](https://blog.rheinwerk-computing.com/tag/web-development) - [Software Development](https://blog.rheinwerk-computing.com/tag/software-development) **Subscribe to our blog!**Get notified about future blog updates. - - - ### Most Popular Blog Posts 1. [What Is?](https://blog.rheinwerk-computing.com/tag/what-is) [What Is the Basic Structure of a Python Program?](https://blog.rheinwerk-computing.com/what-is-the-basic-structure-of-a-python-program) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) 2. [HTML & CSS](https://blog.rheinwerk-computing.com/tag/html-css) [Twelve-Factor App Principles for Developers](https://blog.rheinwerk-computing.com/twelve-factor-app-principles-for-developers) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) 3. [Java](https://blog.rheinwerk-computing.com/tag/java) [Elements of the Java Programming Language](https://blog.rheinwerk-computing.com/elements-of-the-java-programming-language) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) 4. [Cybersecurity](https://blog.rheinwerk-computing.com/tag/cybersecurity) [11 Linux Shell Commands for Hacking and Security](https://blog.rheinwerk-computing.com/11-linux-shell-commands-for-hacking-and-security) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) 5. [User Experience](https://blog.rheinwerk-computing.com/tag/user-experience) [How to "Do" UX Design: A Guide to the ISO 9241-210 Standard](https://blog.rheinwerk-computing.com/how-to-do-ux-design-a-guide-to-the-iso-9241-210-standard) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) **Subscribe to our blog!**Get notified about future blog updates. - - - ### The official Rheinwerk Computing Blog Rheinwerk Computing is an imprint of Rheinwerk Publishing and publishes resources that will help you accelerate your computing journey. The Rheinwerk Computing Blog is designed to provide helpful, actionable information on a variety of topics, including programming, administration, security, and analytics! ### Blog Topics - [All Topics](https://blog.rheinwerk-computing.com) - [Programming Languages](https://blog.rheinwerk-computing.com/tag/programming-languages) - [How To](https://blog.rheinwerk-computing.com/tag/how-to) - [DevOps](https://blog.rheinwerk-computing.com/tag/devops) - [Featured](https://blog.rheinwerk-computing.com/tag/featured) - [JavaScript](https://blog.rheinwerk-computing.com/tag/javascript) - [Cybersecurity](https://blog.rheinwerk-computing.com/tag/cybersecurity) - [What Is?](https://blog.rheinwerk-computing.com/tag/what-is) - [Artificial Intelligence](https://blog.rheinwerk-computing.com/tag/artificial-intelligence) - [Web Development](https://blog.rheinwerk-computing.com/tag/web-development) - [Software Development](https://blog.rheinwerk-computing.com/tag/software-development) ### Blog curated by [![Rheinwerk Computing Logo](https://blog.rheinwerk-computing.com/hubfs/computing_logo-header.svg)](https://www.sap-press.com/rheinwerk-computing/) [Visit Rheinwerk Computing Store](https://www.sap-press.com/rheinwerk-computing/) ### About - [Home](https://sap-press.com/) - [About Us](https://sap-press.com/the-publisher/) - [Contact](mailto:info@rheinwerk-publishing.com) - [Legal Notes](https://sap-press.com/legal-notes/) - [Privacy Policy](https://sap-press.com/privacy/) - [Terms of Use](https://sap-press.com/terms/) © 2026 Rheinwerk Publishing, Inc. | Change Privacy Options