Tutorials

Introduction to Node.js

Node.js: the JavaScript runtime environment at a glance

With the software platform, Node.js, you can use JavaScript server-side and benefit from the asynchronous, event-based programming and the range of options for developing server applications. In this Node.js tutorial, we give you an overview of the program’s modular structure, explain how you can install program modules at any time using the integrated package manager, NPM, and use them to set up...

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...

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...

Archiving and Compression Using Linux

Archive and compress data using Linux

Archiving and compressing files contributes positively to the security and stability of a system. For Linux and other unix-like systems, there are countless free programmes with which you can create unaltered or compressed archive files over the command line and extract them as well. One of the classic packing programmes for Linux is tar. Today, the tool still counts as one of the leading...

Dereferrer | anonymiszing links made easy

Anonymising links – advantages and disadvantages of dereferrer

Privacy is one of the most important aspects of the Internet. Whoever wants to protect themselves will hopefully begin with one of the most basic elements of the World Wide Web: the hyperlink. References from one webpage to the other usually lead in one direction only – information exchange via HTTP, however, takes place in both directions. To prevent this from occurring, Internet users used to...

Integrating MailChimp into Wordpress: easily explained

Using MailChimp in WordPress: how it works

MailChimp and WordPress can be combined effectively. With the help of a plugin, you can integrate the registration form for newsletter campaigns directly on your WordPress website – no programming needed. We explain, step-by-step, how to connect MailChimp and WordPress and how to create a registration form.


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