Tutorials

Sequence diagram

Sequence diagrams: depicting UML message exchanges

Sequence diagrams help you depict the message flow within a system in clear detail. A UML sequence diagram is a good choice for anyone who wants to understand a specific application case well. In object-oriented programming, sequence diagrams are suitable for checking the logic of a system. We’ll present these diagram types in detail and explain how to create a sequence diagram.

How to enable cookies in your browser

How do I enable cookies in my web browser?

Cookies save user information during website access to improve the page’s user-friendliness or record customer behavior. They’re responsible for noting down login data, browser settings, and other useful information so that you don’t have to set everything up again each time you visit the same site. Cookies can be completely or partially enabled, or just enabled for particular websites. How to...

How to Disable Cookies

Disabling cookies: how to turn off cookies in your browser

Cookies serve various purposes on the internet: primarily, they store user data in order to facilitate easy operation of web pages and to make certain web applications available. But they can also be used to track user activity and intrude on user privacy. There are therefore good reasons to either partially disable, i.e. allow them only on certain pages, or completely disable cookies. You can do...

Blockchain

Blockchain

Blockchains are a rather hot topic right now. Though the term is far less common than Bitcoin itself, its significance in today’s world far exceeds that of the latter. After all, cryptocurrencies are run entirely on blockchain technology, which combines peer-to-peer networks with cryptographic methods and various assumptions of game theory. The result: reliable infrastructures tailored for...

Sitemap

Sitemaps – Here’s what you need to know

Sitemaps belong to the standard features of a website, but they seem to be gradually disappearing from the World Wide Web. Some online presences hide the navigation file or even forgo it completely. We explain why search engines like Google still give sitemaps a lot of attention, how important sitemaps are for SEO as a result, and how you can create sitemaps yourself – manually or with a sitemap...

SQL JOIN

SQL JOIN – queries across multiple data tables

A major strength of the relational database model is that information is stored in separate database tables structured according to semantic relationships. This concept, known as normalisation, is the basis for data storage that is as redundancy-free as possible, but requires a mechanism with which data from different tables can be merged for queries. The different JOIN types provide users with...

UML: Unified Modeling Language

UML - a graphical-type modeling language

If you need to run object-oriented programming, to represent a system clearly, and also make it accessible to external specialists, you may find the Universal Modeling Language to be ideal. UML is a modeling language, but has many other possible uses. Since the introduction of UML 2.0, UML diagrams are also suited to the graphical representation of non-computer-based concepts, such as use case...

Raspberry Pi Zero projects

10 Impressive Raspberry Pi Zero Projects

Thanks to its minimalist dimensions, the Raspberry Pi Zero is the ideal component for all craft projects looking to utilise every last inch of space. Having arrived on the market in 2015, the minicomputer has been used in numerous constructions across a range of functions. A brief introduction to the minicomputer and of the most interesting Raspberry Pi Zero applications and ideas can be found in...

Arduino projects: the best Uno and Nano projects

Arduino projects: the best microcontroller ideas

The compact Arduino microcontroller is an essential component for electronic hobbyists and has shaped the global maker movement. Here we introduce the best Arduino project ideas for beginners, instructive tutorials for advanced makers, incredible professional Arduino Nano projects, as well as Arduino Uno projects. For over a decade, technology enthusiasts around the world have been inspired by...

Raspberry-Pi-NAS

Using Raspberry Pi as NAS (network-attached storage)

If you are looking for a central storage system for your own files, you will find the right solution in an NAS system (network attached storage). Since these pre-fabricated boxes are not cheap, using Raspberry Pi as an NAS server host is becoming more and more popular. Combined with USB hard disks or sticks that can be bought anywhere, the minicomputer becomes the perfect storage device for music,...


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