ChinnapongShutterstockOne of the most effective ways to store and retrieve data in a targeted manner is to use key-value pairs. In Java, you can use the HashMap class to do this. In this tutorial, we explain what a Java HashMap is and how the class works using practical examples. We’ll look at how to…
RHEL 8 is a very popular and highly recommended Linux distribution for companies. In this article, we will show you how to install this version of Red Hat Enterprise Linux step by step and configure it according to your exact needs. You will also find out which requirements…
CSS commands work together with HTML to create the look of a website. With CSS, content and design are kept separate. Some commands are used repeatedly and it’s important to incorporate such commands into the code of the CSS file following clean code principles. So which commands…
vetreShutterstockRed Hat Enterprise Linux (RHEL) is a widely recognised and trusted Linux platform favoured by businesses worldwide. Installing RHEL 9 is a straightforward process requiring only a few steps. In this article, we will walk you through the installation procedure and will explore the…
The container platform Docker and Red Hat Enterprise Linux 8 are a worthwhile combination for companies. Here we explain how to install Docker on RHEL 8 via repository or manually and how to check the success of the installation afterwards. We also shed light on the exact…
If you’re trying to improve the readability of your data, you might want to combine records from different tables into a new target table, without duplicates. Rather than copying records piece by piece into the new table, you can use SQL’s UNION operator. In this tutorial, we…
sdecoretShutterstockThe most important factor in any application written or used with the Java programming language is the Java main() method. After all, it serves as the entry point for every Java program. In this article, we’ll explain exactly what the main() method in Java is, how it works and…
UndreyShutterstockYou can use various methods to determine the length of an array in C. Each approach comes with its own set of advantages and disadvantages. It’s best to let the goals and requirements of your codebase guide you. In this tutorial, we’ll explore the most effective functions for…
Mr. KosalshutterstockIn Python, there are various ways you can remove and replace unwanted characters from strings. You can use simple loops, list comprehensions, built-in functions like str.replace() and regular expressions. In this article, we’ll take a look at these different approaches, using…
Mr. KosalshutterstockThe Docker development platform is ideally suited for Red Hat Enterprise Linux 9. We will explain step by step how to install Docker on RHEL 9. You will not only learn how to install via a repository, but also how to install the container platform manually. Keep reading to find…
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