This detailed tutorial shows how to implement pure functions in JavaScript that are deterministic and referentially transparent, and create no side effects.

The examples provided are more than enough to put the code to use, though. I spent a few hours shoehorning the provided samples into a relatively simple React class we can use to leverage the code.

If you’ve gone through Thau’s basic JavaScript tutorial (or you already know a bunch about the subject), Thau’s advanced JavaScript course is just for you. In the previous tutorial, Thau ...

IDG For starters, let’s create a function that draws a watercolor spot with a given position, radius, and hue. P5.js gives us a function to draw an ellipse that we already used last week. By ...