--- title: Learn Computing from the Experts | The Rheinwerk Computing Blog (4) description: Dive into programming, web development, and more with Rheinwerk Computing Blog! Your go-to resource for expanding your computing knowledge. (4) --- [![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 [![A Primer on Asymmetric Cryptography](https://blog.rheinwerk-computing.com/hs-fs/hubfs/A%20Primer%20on%20Asymmetric%20Cryptography.png?height=600&name=A%20Primer%20on%20Asymmetric%20Cryptography.png)](https://blog.rheinwerk-computing.com/a-primer-on-asymmetric-cryptography) [Cybersecurity](https://blog.rheinwerk-computing.com/tag/cybersecurity) ## [A Primer on Asymmetric Cryptography](https://blog.rheinwerk-computing.com/a-primer-on-asymmetric-cryptography) Cryptography is categorized based on the symmetry of the encryption key and encryption-decryption algorithms. ![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/a-primer-on-asymmetric-cryptography) [![Choosing the Right IDE: What Are the Java Development Environments?](https://blog.rheinwerk-computing.com/hs-fs/hubfs/Choosing%20the%20Right%20IDE_%20What%20Are%20the%20Java%20Development%20Environments_.jpg?height=600&name=Choosing%20the%20Right%20IDE_%20What%20Are%20the%20Java%20Development%20Environments_.jpg)](https://blog.rheinwerk-computing.com/choosing-the-right-ide-what-are-the-java-development-environments) [Programming](https://blog.rheinwerk-computing.com/tag/programming) ## [Choosing the Right IDE: What Are the Java Development Environments?](https://blog.rheinwerk-computing.com/choosing-the-right-ide-what-are-the-java-development-environments) From IntelliJ IDEA to Eclipse and beyond, discover how modern IDEs simplify Java development for beginners and experienced developers alike, offering... ![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/choosing-the-right-ide-what-are-the-java-development-environments) [![How Task Cancellation Works in Swift](https://blog.rheinwerk-computing.com/hs-fs/hubfs/How%20Task%20Cancellation%20Works%20in%20Swift.jpg?height=600&name=How%20Task%20Cancellation%20Works%20in%20Swift.jpg)](https://blog.rheinwerk-computing.com/how-task-cancellation-works-in-swift) [Featured](https://blog.rheinwerk-computing.com/tag/featured) ## [How Task Cancellation Works in Swift](https://blog.rheinwerk-computing.com/how-task-cancellation-works-in-swift) Long-running operations are common in modern Swift applications—from network requests and file processing to background data synchronization. ![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-task-cancellation-works-in-swift) [![What Special Characters Mean in Bash Shell Programming](https://blog.rheinwerk-computing.com/hs-fs/hubfs/What%20Special%20Characters%20Mean%20in%20Bash%20Shell%20Programming.jpg?height=600&name=What%20Special%20Characters%20Mean%20in%20Bash%20Shell%20Programming.jpg)](https://blog.rheinwerk-computing.com/what-special-characters-mean-in-bash-shell-programming) [Featured](https://blog.rheinwerk-computing.com/tag/featured) ## [What Special Characters Mean in Bash Shell Programming](https://blog.rheinwerk-computing.com/what-special-characters-mean-in-bash-shell-programming) When working in the Bash shell, special characters aren’t just punctuation, they’re control mechanisms. ![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-special-characters-mean-in-bash-shell-programming) [![Creating an Anaconda Account and Opening Your First Notebook](https://blog.rheinwerk-computing.com/hs-fs/hubfs/Creating%20an%20Anaconda%20Account%20and%20Opening%20Your%20First%20Notebook.jpg?height=600&name=Creating%20an%20Anaconda%20Account%20and%20Opening%20Your%20First%20Notebook.jpg)](https://blog.rheinwerk-computing.com/creating-an-anaconda-account-and-opening-your-first-notebook) [Featured](https://blog.rheinwerk-computing.com/tag/featured) ## [Creating an Anaconda Account and Opening Your First Notebook](https://blog.rheinwerk-computing.com/creating-an-anaconda-account-and-opening-your-first-notebook) Before you start building models in Python or R, you need astable environment—here’s how Anaconda helps you manage dependencies and get coding... ![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/creating-an-anaconda-account-and-opening-your-first-notebook) [![Why the Single Responsibility Principle Matters in Practice](https://blog.rheinwerk-computing.com/hs-fs/hubfs/Why%20the%20Single%20Responsibility%20Principle%20Matters%20in%20Practice.jpg?height=600&name=Why%20the%20Single%20Responsibility%20Principle%20Matters%20in%20Practice.jpg)](https://blog.rheinwerk-computing.com/why-the-single-responsibility-principle-matters-in-practice) [Featured](https://blog.rheinwerk-computing.com/tag/featured) ## [Why the Single Responsibility Principle Matters in Practice](https://blog.rheinwerk-computing.com/why-the-single-responsibility-principle-matters-in-practice) Software systems rarely fail because of a single large mistake. More often, they fail because small, seemingly reasonable changes interact in... ![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/why-the-single-responsibility-principle-matters-in-practice) [![What the Conv2D Layer Does in Convolutional Neural Networks](https://blog.rheinwerk-computing.com/hs-fs/hubfs/What%20the%20Conv2D%20Layer%20Does%20in%20Convolutional%20Neural%20Networks.jpg?height=600&name=What%20the%20Conv2D%20Layer%20Does%20in%20Convolutional%20Neural%20Networks.jpg)](https://blog.rheinwerk-computing.com/what-the-conv2d-layer-does-in-convolutional-neural-networks) [Featured](https://blog.rheinwerk-computing.com/tag/featured) ## [What the Conv2D Layer Does in Convolutional Neural Networks](https://blog.rheinwerk-computing.com/what-the-conv2d-layer-does-in-convolutional-neural-networks) Convolutional neural networks process images very differently from the fully connected networks. ![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-the-conv2d-layer-does-in-convolutional-neural-networks) [![Security Awareness Training Scenarios, Part 1: Contaminated Workplace](https://blog.rheinwerk-computing.com/hs-fs/hubfs/Security%20Awareness%20Training%20Scenarios%2c%20Part%201_%20Contaminated%20Workplace.jpg?height=600&name=Security%20Awareness%20Training%20Scenarios,%20Part%201_%20Contaminated%20Workplace.jpg)](https://blog.rheinwerk-computing.com/security-awareness-training-scenarios-contaminated-workplace) [Administration](https://blog.rheinwerk-computing.com/tag/administration) ## [Security Awareness Training Scenarios, Part 1: Contaminated Workplace](https://blog.rheinwerk-computing.com/security-awareness-training-scenarios-contaminated-workplace) Security awareness training is most effective when participants can experience threats in a realistic, hands-on environment. ![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/security-awareness-training-scenarios-contaminated-workplace) [![How to Customize Excel: Options, Defaults, and Interface Settings Explained](https://blog.rheinwerk-computing.com/hs-fs/hubfs/How%20to%20Customize%20Excel_%20Options%2c%20Defaults%2c%20and%20Interface%20Settings%20Explained.jpg?height=600&name=How%20to%20Customize%20Excel_%20Options,%20Defaults,%20and%20Interface%20Settings%20Explained.jpg)](https://blog.rheinwerk-computing.com/how-to-customize-excel-options-defaults-and-interface-settings-explained) [Featured](https://blog.rheinwerk-computing.com/tag/featured) ## [How to Customize Excel: Options, Defaults, and Interface Settings Explained](https://blog.rheinwerk-computing.com/how-to-customize-excel-options-defaults-and-interface-settings-explained) Excel lets you customize its interface, defaults, and behavior so it works the way you do**.** ![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-customize-excel-options-defaults-and-interface-settings-explained) [![How Throwing Errors Works in Swift](https://blog.rheinwerk-computing.com/hs-fs/hubfs/How%20Throwing%20Errors%20Works%20in%20Swift.jpg?height=600&name=How%20Throwing%20Errors%20Works%20in%20Swift.jpg)](https://blog.rheinwerk-computing.com/how-throwing-errors-works-in-swift) [Featured](https://blog.rheinwerk-computing.com/tag/featured) ## [How Throwing Errors Works in Swift](https://blog.rheinwerk-computing.com/how-throwing-errors-works-in-swift) In Swift, error handling is built around the idea of throwing errors when something goes wrong and letting calling code decide how to respond. ![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-throwing-errors-works-in-swift) - 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