Four reliable ways to center an element, and how to pick the right one.

How dozens of simple robots can solve problems that no single robot can, using three local rules.

Two small functions that keep busy events from slowing your page down, and when to use each.

Why I replaced a paper notebook and three apps with plain Markdown files, and how the setup works.

A blameless write-up of a lab demo that went wrong, and the three changes we made afterwards.