--- title: Learn Computing from the Experts | The Rheinwerk Computing Blog (11) description: Dive into programming, web development, and more with Rheinwerk Computing Blog! Your go-to resource for expanding your computing knowledge. (11) --- [![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/What%20Is%20Graph%20Theory%20for%20Neural%20Networks_.jpg?width=1000&name=What%20Is%20Graph%20Theory%20for%20Neural%20Networks_.jpg) [Featured](https://blog.rheinwerk-computing.com/tag/featured) | Featured article ## [What Is Graph Theory for Neural Networks?](https://blog.rheinwerk-computing.com/what-is-graph-theory-for-neural-networks) A *graph* is a mathematical structure that represents a set of objects and the relation­ships among those objects. A graph always consists of two basic components: ![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-graph-theory-for-neural-networks) # Latest Blog Posts [![What Is a Click Dummy in Web Design?](https://blog.rheinwerk-computing.com/hs-fs/hubfs/What%20Is%20a%20Click%20Dummy%20in%20Web%20Design.png?height=600&name=What%20Is%20a%20Click%20Dummy%20in%20Web%20Design.png)](https://blog.rheinwerk-computing.com/what-is-a-click-dummy-in-web-design) [Web Development](https://blog.rheinwerk-computing.com/tag/web-development) ## [What Is a Click Dummy in Web Design?](https://blog.rheinwerk-computing.com/what-is-a-click-dummy-in-web-design) When you present a screen flow for evaluation by a group of users, most people will have a tough time imagining how using the tool will feel to them... ![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-click-dummy-in-web-design) [![What Is a Rapid User Test in Software Development?](https://blog.rheinwerk-computing.com/hs-fs/hubfs/What%20Is%20a%20Rapid%20User%20Test%20in%20Software%20Development.jpg?height=600&name=What%20Is%20a%20Rapid%20User%20Test%20in%20Software%20Development.jpg)](https://blog.rheinwerk-computing.com/what-is-a-rapid-user-test-in-software-development) [Web Development](https://blog.rheinwerk-computing.com/tag/web-development) ## [What Is a Rapid User Test in Software Development?](https://blog.rheinwerk-computing.com/what-is-a-rapid-user-test-in-software-development) Curious how to get user feedback faster than ever? Discover the ins and outs of rapid user testing—an efficient, cost-effective way to refine your... ![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-rapid-user-test-in-software-development) [![Understanding HTML Character Encoding: Why UTF-8 Matters](https://blog.rheinwerk-computing.com/hs-fs/hubfs/Understanding%20HTML%20Character%20Encoding_%20Why%20UTF-8%20Matters.jpg?height=600&name=Understanding%20HTML%20Character%20Encoding_%20Why%20UTF-8%20Matters.jpg)](https://blog.rheinwerk-computing.com/understanding-html-character-encoding-why-utf-8-matters) [HTML & CSS](https://blog.rheinwerk-computing.com/tag/html-css) ## [Understanding HTML Character Encoding: Why UTF-8 Matters](https://blog.rheinwerk-computing.com/understanding-html-character-encoding-why-utf-8-matters) Ensure your HTML documents display special characters correctly by understanding character encoding and why UTF-8 is the preferred standard for... ![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/understanding-html-character-encoding-why-utf-8-matters) [![What Are the Most Popular Programming Languages and Which Should You Learn?](https://blog.rheinwerk-computing.com/hs-fs/hubfs/What%20Are%20the%20Most%20Popular%20Programming%20Languages%20and%20Which%20Should%20You%20Learn_.jpg?height=600&name=What%20Are%20the%20Most%20Popular%20Programming%20Languages%20and%20Which%20Should%20You%20Learn_.jpg)](https://blog.rheinwerk-computing.com/what-are-the-most-popular-programming-languages-and-which-should-you-learn) [Java](https://blog.rheinwerk-computing.com/tag/java) ## [What Are the Most Popular Programming Languages and Which Should You Learn?](https://blog.rheinwerk-computing.com/what-are-the-most-popular-programming-languages-and-which-should-you-learn) In addition to the basic differences between the individual programming languages, beginners may wonder what a programming language is at all, what... ![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-the-most-popular-programming-languages-and-which-should-you-learn) [![How to Authenticate the Nest CLI](https://blog.rheinwerk-computing.com/hs-fs/hubfs/How%20to%20Authenticate%20the%20Nest%20CLI.jpg?height=600&name=How%20to%20Authenticate%20the%20Nest%20CLI.jpg)](https://blog.rheinwerk-computing.com/how-to-authenticate-the-nest-cli) [JavaScript](https://blog.rheinwerk-computing.com/tag/javascript) ## [How to Authenticate the Nest CLI](https://blog.rheinwerk-computing.com/how-to-authenticate-the-nest-cli) For authentication, Nest uses an established library—Passport—and integrates it into the framework via an abstraction layer. ![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-authenticate-the-nest-cli) [![Design Patterns in Java](https://blog.rheinwerk-computing.com/hs-fs/hubfs/Design%20Patterns%20in%20Java.jpg?height=600&name=Design%20Patterns%20in%20Java.jpg)](https://blog.rheinwerk-computing.com/design-patterns-in-java) [Java](https://blog.rheinwerk-computing.com/tag/java) ## [Design Patterns in Java](https://blog.rheinwerk-computing.com/design-patterns-in-java) Master the art of clean, scalable object-oriented programming in Java with design patterns like Singleton, Factory, and Observer—your ultimate guide... ![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/design-patterns-in-java) [![Logging Implementation in Spring](https://blog.rheinwerk-computing.com/hs-fs/hubfs/Logging%20Implementation%20in%20Spring.png?height=600&name=Logging%20Implementation%20in%20Spring.png)](https://blog.rheinwerk-computing.com/logging-implementation-in-spring) [Java](https://blog.rheinwerk-computing.com/tag/java) ## [Logging Implementation in Spring](https://blog.rheinwerk-computing.com/logging-implementation-in-spring) We work in Spring Boot with SLF4J, but not with the application programming interface (API) of the actual logging provider. ![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/logging-implementation-in-spring) [![How to Manage Dotfiles with Git](https://blog.rheinwerk-computing.com/hs-fs/hubfs/How%20to%20Manage%20Dotfiles%20with%20Git.jpg?height=600&name=How%20to%20Manage%20Dotfiles%20with%20Git.jpg)](https://blog.rheinwerk-computing.com/how-to-manage-dotfiles-with-git) [DevOps](https://blog.rheinwerk-computing.com/tag/devops) ## [How to Manage Dotfiles with Git](https://blog.rheinwerk-computing.com/how-to-manage-dotfiles-with-git) *Dotfiles*, that is, files whose names begin with a period, are used to store settings on all Unix-like operating systems. ![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-manage-dotfiles-with-git) [![How to Manage User Sessions in PHP Securely](https://blog.rheinwerk-computing.com/hs-fs/hubfs/How%20to%20Manage%20User%20Sessions%20in%20PHP%20Securely.jpg?height=600&name=How%20to%20Manage%20User%20Sessions%20in%20PHP%20Securely.jpg)](https://blog.rheinwerk-computing.com/how-to-manage-user-sessions-in-php-securely) [Programming Languages](https://blog.rheinwerk-computing.com/tag/programming-languages) ## [How to Manage User Sessions in PHP Securely](https://blog.rheinwerk-computing.com/how-to-manage-user-sessions-in-php-securely) Despite all the advantages that sessions offer, the disadvantages should not be completely ignored. ![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-manage-user-sessions-in-php-securely) [![Understanding SQL Indexes: How They Speed Up Queries](https://blog.rheinwerk-computing.com/hs-fs/hubfs/Understanding%20SQL%20Indexes_%20How%20They%20Speed%20Up%20Queries.jpg?height=600&name=Understanding%20SQL%20Indexes_%20How%20They%20Speed%20Up%20Queries.jpg)](https://blog.rheinwerk-computing.com/understanding-sql-indexes-how-they-speed-up-queries) [Programming Languages](https://blog.rheinwerk-computing.com/tag/programming-languages) ## [Understanding SQL Indexes: How They Speed Up Queries](https://blog.rheinwerk-computing.com/understanding-sql-indexes-how-they-speed-up-queries) An *index* in SQLis actually not a database key type, but keys and indexes are loosely related concepts, so we’ll cover them in this post. ![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/understanding-sql-indexes-how-they-speed-up-queries) - - [1](https://blog.rheinwerk-computing.com/page/1) - [...](https://blog.rheinwerk-computing.com/page/6) - [9](https://blog.rheinwerk-computing.com/page/9) - [10](https://blog.rheinwerk-computing.com/page/10) - [11](https://blog.rheinwerk-computing.com/page/11) - [12](https://blog.rheinwerk-computing.com/page/12) - [13](https://blog.rheinwerk-computing.com/page/13) - [...](https://blog.rheinwerk-computing.com/page/16) - [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) - [Artificial Intelligence](https://blog.rheinwerk-computing.com/tag/artificial-intelligence) - [What Is?](https://blog.rheinwerk-computing.com/tag/what-is) - [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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