If you write JavaScript, you have probably used higher-order functions and not even noticed. If you have ever replaced a for loop with an array method, you’ve used higher-order functions.

This tutorial explains what is different and special about a functional programmer's approach, and demonstrates how to implement JavaScript functions from a functional programming point of view. It ...

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.