Recent Posts
about technology, development, gaming and whatever comes to my mind.
Introducing new Services Section
I’m excited to announce the launch of a new section on my website, dedicated to showcasing the professional services I offer as a freelance software developer. Whether you’re a startup looking to build your first product, an established business aiming to streamline operations, or a company seeking specialized expertise, this section highlights how I can help you achieve your goals. In today’s fast-paced world, businesses rely on technology to stay competitive, and having the right software solutions is crucial. With years of experience in software development, I offer tailored
Introducing Calcit: A Fun and Easy Way for Kids to Practice Mental Arithmetic
As parents, we’re always looking for ways to make learning fun and engaging for our kids. Recently, when my daughter’s teacher asked parents to create index cards with arithmetic problems for our first graders, I thought: "Why not make this process more interactive and accessible?" That’s how Calcit was born. Calcit is a simple yet effective web app designed to help young learners practice mental arithmetic. It’s built for kids around 7 years old (first graders), and it covers calculations with numbers from 0 to 20. The best part?
Unveiling Dielmann Consulting’s Logo
I am thrilled to introduce my brand-new logo, a powerful symbol that embodies the spirit of my recently established business, Dielmann Consulting. This emblem is more than just a visual representation; it encapsulates my unwavering dedication to expertise and innovation. A Contemporary Design My logo has been crafted to be modern and sleek, mirroring my commitment to staying ahead of the curve in the ever-changing IT landscape. It's a fresh and stylish design that reflects my passion for being on the cutting edge of technology. The Fusion of 'D'
Goodbye and thank you, MHP!
After 8.5 years, I quit my job at MHP to become a self-employed software developer and consultant.
Be careful with the spread syntax of ES6
The spread syntax is a JavaScript feature that really comes in handy for several use cases. Yet there are some caveats that you should be aware of when using it. What is the spread syntax? The spread syntax ... can be used together with JavaScript objects and iterables (such as arrays) in JavaScript ES6 or TypeScript. When using the spread syntax with an array, the array can be expanded in a place where zero or more arguments (e.g. in function calls) or elements (e.g. within array literals) are
First lecture at Hochschule Düsseldorf
I have just finished my first lecture as a guest lecturer at my former University in Düsseldorf, Germany. I can tell the Hochschule Düsseldorf has aged quite well. The new building complex close to the Autobahn A52 is really impressive and fits well to the modern skills students can learn here. My lecture was a great experience as a former HSD student. More than 7 years ago, I learned a lot about user experience, usability and programming in general here. I always admired the small courses combined with hands-on
Custom npm registry with authentication
If you are working on an enterprise project for a large customer, you are possibly working with scoped and private npm packages. This can be libraries or utility code that is shared across multiple applications. You will not find these packages on the public npm registry at https://registry.npmjs.org/. This kind of private packages are usually published into a custom npm registry like Sonatype Nexus or JFrog's Artifactory. While this is a cool feature in general, a slow enterprise registry will not only impact your local npm commands, but also slow
Microfrontend with Angular and Webpack Module Federation
Large software monolithes have been a common problem in business applications for years. Backend architects already came up with microservices to tackle this problem a while ago. But frontend developers were still lacking a clean technical solution until now. Most of today's microfrontend solutions (such as webcomponents) feel cumbersome and overcomplicated. Especially if you want to use a framework like Angular, React or vue.js. Furtunately, Angular 11 (or rather Webpack 5) finally comes up with a solution for this: The Webpack ModuleFederationPlugin. This awesome chunk of code allows applications to
Unit Testing Angular Pipes
While unit tests in general can get complex really fast (especially when it is required to mock a lot of dependencies), unit testing Angular Pipes is fortunately one of the easier exercises. Likewise, they usually have zero to few dependencies and implement a single interface function that can be treated as a blackbox. The transform interface of Angular Pipes has clearly defined inputs and outputs and usually no side effects, which makes it a perfect entry in unit testing in general. I have prepared an example repository on my
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