R is a widely used programming language for performing data analysis and statistical computing. It is an increasingly popular and extensible language with an active community. R offers many user-generated packages for specific areas of study, which makes it applicable to many fields.
In Redis, sorted sets are a data type similar to sets in that both are non repeating groups of strings. The difference is that each member of a sorted set is associated with a score, allowing them to be sorted or ranked from the smallest score to the greatest. This tutorial explains how to create sorted sets, retrieve and remove their members, and create new sorted sets from existing ones.
In this tutorial, you will set up and secure your own private Docker Registry. You will use Docker Compose to define configurations that run your Docker containers and Nginx to forward server traffic from the internet to the running Docker container. Once you’ve completed this tutorial, you will be able to push a custom Docker image to your private registry and pull the image securely from a remote server.
*The author selected Open Source Initiative to receive a donation as part of the Write for DOnations program.* Introduction to MicroK8s While many options are available for a Kubernetes cluster, not all follow a simple setup. MicroK8s, developed by Canonical, simplifies the Kubernetes cluster setup process through its single command binary installation and can be […]
Whether you’ve installed Redis locally or you’re working with a remote instance, you need to connect to it in order to perform certain operations. In this tutorial we will go over how to connect to Redis from the command line, how to authenticate and test your connection, as well as how to close a Redis connection.
Neo4j is a graph database that records relationships between data nodes, whereas traditional relational databases use rows and columns to store and structure data. Since each node stores references to all the other nodes that it is connected to, Neo4j can encode and query complex relationships with minimal overhead.
Apache Cassandra is an open-source, masterless, and distributed NoSQL database system. Cassandra is considered highly suited for mission-critical applications and multi-node setups because it’s scalable, elastic, and fault-tolerant. In this tutorial, you’ll install and use Cassandra to run a single-node cluster on Ubuntu 22.04.
Introduction Ruby is a dynamic programming language you can use to write anything from simple scripts to games and web applications. It was first released in Japan in 1993, but gained popularity in 2005 as a language for server-side web development. Ruby is designed to be easy to use and fun for beginners, but powerful […]
In Redis, strings are the most basic type of value you can create and manage. This tutorial provides an overview of how to create and retrieve strings, as well as how to manipulate the values held by string keys.
This guide will walk you through the process of configuring a remote MySQL database server that your website or application can connect to. It uses WordPress as a working example of something that can connect to the MySQL backend remotely, but the technique is widely applicable to any application backed by MySQL.
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