An Intuitive Guide to Linear Algebra.

The 0,5 MB of nothing in all Apple Music files.

After Nova, yet another code editor for Mac: Zas Editor.

Textbook examples are there to illustrate a method. The recommended approach is to first give two examples where the method works, then one where it fails. But we, the textbook writers, are busy, so we’ll often just give the one that works and stop. As I wrote once, “the book has a chapter on regression discontinuity designs. That’s fine. But all we see in the chapter are successes.” — The examples you see in the textbooks are not representative of the sorts of problems you see in the real world

Sometimes, though, I think there’s a value in doing things the old fashioned way, if only to get a little “closer to the ground” on what our tools are doing behind the scenes. — The Simple Joy of Coding by Hand

Principal Component Analysis for Data Science .

Roll your own Ngrok with Nginx, Letsencrypt, and SSH reverse tunnelling.

Using Vim/Emacs is like a refactoring process. #vim

Why we don’t use a staging environment.

Consume input from stdin, produce output to stdout. Put another way, your program should be a filter. Filters are easily integrated into shell pipelines, arguably the most important utility for Unix tools composition. — Hints for writing Unix tools