Welcome to the digital age: every day the average American spends hours looking at smartphone screens and PC monitors. But most still lack even a basic understanding on how the programs affecting their everyday life work. If you think you may fit into this demographic, don’t worry: thanks to online courses, videos tutorials, and supportive internet communities, it’s never been easier to learn...
If large amounts of data have to be indexed and structured, the license-free engine, Elasticsearch, is a popular solution. The Kibana web interface is often used to present the processed data in an appealing form. Together with Elasticsearch and Logstash, this forms the so-called ELK stack. In our Kibana tutorial, we explain step by step how to get the server application Kibana up and running and...
Continuous integration can improve the work of software development: fewer errors and more efficient, continuous integration. But this requires a simple yet comprehensive tool. That's why we're introducing Jenkins. This software makes it easier for you to work with automatic builds and individual pipelines. Our Jenkins tutorial will help you along the way!
Applications on the web need interfaces in order to exchange data. If you run a web project yourself and want to grant other programs access to certain data sets, an API (application programming interface) like this is essential. Established concepts such as REST or SOAP are often used in development – but there are alternatives, as GraphQL proves.
Are you looking to publish an e-book and are searching for the right file format to suit your needs? In the third part of our series on e-books, we’ll be taking a closer look at the most popular e-book formats on the market today, comparing their advantages and disadvantages and helping you to decide which format is the right one for you.
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.
You do not have to provide any reasons to delete your PayPal account: If you find that you do not need or want to use your account anymore, then that’s enough to delete it. To do this, you don't even need to contact the service team directly, because in your profile settings you’ll find the option to delete your PayPal account quickly and easily.
Class diagrams are structural diagrams in the UML modeling language. The UML class diagram is suitable for visualizing system elements and their dependencies for object-oriented programming languages. If you are a modeler creating a class diagram, it is advantageous to adhere to the official notation and semantics. This is the only way to avoid misunderstandings. We will explain notation for the...
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...
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 normalization, 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...
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