--- title: Learn Computing from the Experts | The Rheinwerk Computing Blog (9) description: Dive into programming, web development, and more with Rheinwerk Computing Blog! Your go-to resource for expanding your computing knowledge. (9) --- [![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) # Latest Blog Posts [![Temporal Functions in SQL](https://blog.rheinwerk-computing.com/hs-fs/hubfs/Temporal%20Functions%20in%20SQL.jpg?height=600&name=Temporal%20Functions%20in%20SQL.jpg)](https://blog.rheinwerk-computing.com/temporal-functions-in-sql) [Programming Languages](https://blog.rheinwerk-computing.com/tag/programming-languages) ## [Temporal Functions in SQL](https://blog.rheinwerk-computing.com/temporal-functions-in-sql) The topic of temporal functions covers date manipulations. In this blog post, we’ll inspect commonly used SQL functions in this category. ![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/temporal-functions-in-sql) [![How to Display Figures, Lines, and Arrows with Matplotlib](https://blog.rheinwerk-computing.com/hs-fs/hubfs/How%20to%20Display%20Figures%2c%20Lines%2c%20and%20Arrows%20with%20Matplotlib.jpg?height=600&name=How%20to%20Display%20Figures,%20Lines,%20and%20Arrows%20with%20Matplotlib.jpg)](https://blog.rheinwerk-computing.com/how-to-display-figures-lines-and-arrows-with-matplotlib) [Python](https://blog.rheinwerk-computing.com/tag/python) ## [How to Display Figures, Lines, and Arrows with Matplotlib](https://blog.rheinwerk-computing.com/how-to-display-figures-lines-and-arrows-with-matplotlib) The matplotlib module can plot geometric figures such as rectangles, circles, and triangles. These figures can then illustrate mathematical,... ![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-display-figures-lines-and-arrows-with-matplotlib) [![How to Create Your First Bash Script](https://blog.rheinwerk-computing.com/hs-fs/hubfs/How%20to%20Create%20Your%20First%20Bash%20Script.jpg?height=600&name=How%20to%20Create%20Your%20First%20Bash%20Script.jpg)](https://blog.rheinwerk-computing.com/how-to-create-your-first-bash-script) [Programming Languages](https://blog.rheinwerk-computing.com/tag/programming-languages) ## [How to Create Your First Bash Script](https://blog.rheinwerk-computing.com/how-to-create-your-first-bash-script) A script is a text file in which you formulate the same commands that you enter interactively in the terminal. ![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-create-your-first-bash-script) [![What Are Dockerfiles?](https://blog.rheinwerk-computing.com/hs-fs/hubfs/What%20Are%20Dockerfiles_.jpg?height=600&name=What%20Are%20Dockerfiles_.jpg)](https://blog.rheinwerk-computing.com/what-are-dockerfiles) [DevOps](https://blog.rheinwerk-computing.com/tag/devops) ## [What Are Dockerfiles?](https://blog.rheinwerk-computing.com/what-are-dockerfiles) If you've ever used Docker Hub to spin up containers, you've probably relied on ready-to-go images. ![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-are-dockerfiles) [![Getting Started with AppArmor: Linux Security Made Simple](https://blog.rheinwerk-computing.com/hs-fs/hubfs/Getting%20Started%20with%20AppArmor_%20Linux%20Security%20Made%20Simple.jpg?height=600&name=Getting%20Started%20with%20AppArmor_%20Linux%20Security%20Made%20Simple.jpg)](https://blog.rheinwerk-computing.com/getting-started-with-apparmor-linux-security-made-simple) [Cybersecurity](https://blog.rheinwerk-computing.com/tag/cybersecurity) ## [Getting Started with AppArmor: Linux Security Made Simple](https://blog.rheinwerk-computing.com/getting-started-with-apparmor-linux-security-made-simple) AppArmor is a Linux security module that helps protect your system by restricting what programs can do—without the complexity of SELinux. ![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/getting-started-with-apparmor-linux-security-made-simple) [![How to Add a Form to a Website with PHP](https://blog.rheinwerk-computing.com/hs-fs/hubfs/How%20to%20Add%20a%20Form%20to%20a%20Website%20with%20PHP.jpg?height=600&name=How%20to%20Add%20a%20Form%20to%20a%20Website%20with%20PHP.jpg)](https://blog.rheinwerk-computing.com/how-to-add-a-form-to-a-website-with-php) [Programming Languages](https://blog.rheinwerk-computing.com/tag/programming-languages) ## [How to Add a Form to a Website with PHP](https://blog.rheinwerk-computing.com/how-to-add-a-form-to-a-website-with-php) Dynamic websites never work without a form. In this post, we’ll teach you how to add one with PHP. ![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-add-a-form-to-a-website-with-php) [![How to Scale and Load Balance in Kubernetes](https://blog.rheinwerk-computing.com/hs-fs/hubfs/How%20to%20Scale%20and%20Load%20Balance%20in%20Kubernetes.png?height=600&name=How%20to%20Scale%20and%20Load%20Balance%20in%20Kubernetes.png)](https://blog.rheinwerk-computing.com/how-to-scale-and-load-balance-in-kubernetes) [DevOps](https://blog.rheinwerk-computing.com/tag/devops) ## [How to Scale and Load Balance in Kubernetes](https://blog.rheinwerk-computing.com/how-to-scale-and-load-balance-in-kubernetes) Along with self-healing, horizontal scaling is one of the best features of Kubernetes that significantly simplifies IT operations. ![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-scale-and-load-balance-in-kubernetes) [![How to Find and Avoid Errors in JavaScript Programs](https://blog.rheinwerk-computing.com/hs-fs/hubfs/How%20to%20Find%20and%20Avoid%20Errors%20in%20JavaScript%20Programs.jpg?height=600&name=How%20to%20Find%20and%20Avoid%20Errors%20in%20JavaScript%20Programs.jpg)](https://blog.rheinwerk-computing.com/how-to-find-and-avoid-errors-in-javascript-programs) [Programming Languages](https://blog.rheinwerk-computing.com/tag/programming-languages) ## [How to Find and Avoid Errors in JavaScript Programs](https://blog.rheinwerk-computing.com/how-to-find-and-avoid-errors-in-javascript-programs) During the development of any program (including JavaScript programs), you’ll make the odd mistake. This is normal and part of everyday life when you... ![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-find-and-avoid-errors-in-javascript-programs) [![How to Set Up Single-Page Web Applications with React](https://blog.rheinwerk-computing.com/hs-fs/hubfs/How%20to%20Set%20Up%20Single-Page%20Web%20Applications%20with%20React.png?height=600&name=How%20to%20Set%20Up%20Single-Page%20Web%20Applications%20with%20React.png)](https://blog.rheinwerk-computing.com/how-to-set-up-single-page-web-applications-with-react) [Web Development](https://blog.rheinwerk-computing.com/tag/web-development) ## [How to Set Up Single-Page Web Applications with React](https://blog.rheinwerk-computing.com/how-to-set-up-single-page-web-applications-with-react) A React application usually consists of a large number of small files that have interdependencies that you can resolve via the JavaScript module... ![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-set-up-single-page-web-applications-with-react) [![Getting Started with Amazon ECS: Simplifying Docker Container Management in the Cloud](https://blog.rheinwerk-computing.com/hs-fs/hubfs/Getting%20Started%20with%20Amazon%20ECS_%20Simplifying%20Docker%20Container%20Management%20in%20the%20Cloud.jpg?height=600&name=Getting%20Started%20with%20Amazon%20ECS_%20Simplifying%20Docker%20Container%20Management%20in%20the%20Cloud.jpg)](https://blog.rheinwerk-computing.com/getting-started-with-amazon-ecs-simplifying-docker-container-management-in-the-cloud) [DevOps](https://blog.rheinwerk-computing.com/tag/devops) ## [Getting Started with Amazon ECS: Simplifying Docker Container Management in the Cloud](https://blog.rheinwerk-computing.com/getting-started-with-amazon-ecs-simplifying-docker-container-management-in-the-cloud) Discover how Amazon Elastic Container Service (ECS) streamlines the deployment and management of Docker containers in the cloud, offering scalability... ![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/getting-started-with-amazon-ecs-simplifying-docker-container-management-in-the-cloud) - - [1](https://blog.rheinwerk-computing.com/page/1) - [...](https://blog.rheinwerk-computing.com/page/4) - [7](https://blog.rheinwerk-computing.com/page/7) - [8](https://blog.rheinwerk-computing.com/page/8) - [9](https://blog.rheinwerk-computing.com/page/9) - [10](https://blog.rheinwerk-computing.com/page/10) - [11](https://blog.rheinwerk-computing.com/page/11) - [...](https://blog.rheinwerk-computing.com/page/14) - [30](https://blog.rheinwerk-computing.com/page/30) - ### 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. 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