This post shows how to add tests to JavaScript code that uses Date or moment functions. I will explain how to mock dates and how to make tests independent from the timezone.

As part of my personal onboarding for Siemens MindSphere my first goal was to simulate a simple thing which delivers data to MindSphere. In this blog post I would like to demonstrate how you can create a simple NodeJS application for sending data to MindSphere platform. The code is available on GitHub.

When committing to Cloud Foundry some companies make the strategic decision to take full ownership of platform deployment and operations and deploy the open source Cloud Foundry distribution to fully understand all moving parts. While open source Cloud Foundry has gotten rather easy to deploy with the cf-deployment project, there is still a lot of more to do in order to make an open source deployment production ready. This blog post highlights the challenges we faced unique to deploying the open source Cloud Foundry, and gives advice on how to grow through these challenges.

This article is about my experience with the YubiKey 4 for full disk encryption (FDE) with Linux. I will introduce the YubiKey and its capabilities of the entire disk encryption with Multi-Factor Authentication.

Since Elasticsearch 5, the default similarity algorithm for Elasticsearch is Okapi BM25. A similarity (scoring/ranking model) defines how matching documents are scored. Performing a search against a set of documents gives you results sorted by relevance. In one of our previous blog posts by Rocco Schulz, BM25 was already mentioned. In this blog article, we are going to look into the inner workings of the Okapi BM25 algorithm.