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jq jq is a command line tool for processing JSON data. It is useful when executing small ad-hoc tasks. In this sense, it is similar to sed, awk and grep. It is very good for the first step in exploratory data analysis: Getting an idea what you actually have. Installation # Ubuntu … Read More »

Ansible Ansible is a configuration management tool maintained by Red Hat. It has to be installed on a controll machine. On the target machine, no configuration is needed. The control machine connects to the target machines via SSH. Which problem does it solve? In short: Ansible makes configurations repeatable. Why this … Read More »

Fitness Trackers Fitness trackers are devices which measure things like walked distance and heartbeats. They are usually writstbands. I recently got excited by them and gave them a try. I tried the Mi Band 4. It is one of the cheapest fitness bands which still had very good reviews. I was not … Read More »

Password Managers I recently thought about good solutions for passwords in general. I have found one with which I was ok for a while, but more and more services get compromised. Try haveibeenpwned.com or Firefox Monitor to see if you are affected. One easy way to keep the damage small is … Read More »

Key-Value Stores This is a first draft - many more things are about to be added 🙂 Key-value stores are specialized NoSQL databases. Essentially, they are dictionaries1. Database Properties ACID is a set of properties of database transactions intended to guarantee validity even in the event of errors, power failures, etc: Atomicity … Read More »

Sandwich I eat sandwiches a lot. I make them myself. Ingredients For two sandwiches (about 4 sandwiches are enough for dinner for one person): Toast 2 sliced sausage - there are vegetarian options at Aldi which taste similar as well Some table mustard Some Balsamic Cream Vinegar 1 Tomato 4 Small pickled … Read More »

pyproject.toml The pyproject.toml file is a solution for defining the build system as a dependency. Also, other kinds of meta-data and the install requirements can be defined in it. If you are interested in a sample project, try pypa/sampleproject or try the packaging tutorial. Example [project] name = "infer_pyproject" version … Read More »

Working Remotely Working remotely means working without a central office space. It means you decide where you work and you interact with your co-workers online. Manifesto There are many different ways to work remotely and to coordinate. The core part for sure is the location, but a connected part are office hours … Read More »

Homöopathie This post is about Homeopathy. If you want to read it, try deepl.com Homöopathie ist eine Gruppe von Behandlungsmethoden die auf Vorstellungen von Samuel Hahnemann (ca 1796) basieren. Die Idee Ähnlichkeitsprinzip "Ähnliches möge durch Ähnliches geheilt werden". Ein homöopathisches Arzneimittel soll so ausgewählt werden, dass die Inhaltsstoffe der Grundsubstanz … Read More »

Movielens Data Set I'm recently thinking a lot about recommendations and about building the book recommendation portal I had in mind since 2013. However, for recommendation systems it is as hard as with any branch of machine learning to find a good overview over techniques, their respective strengths and drawbacks as well as … Read More »