One common question I get about coding in Fennel is about how to effectively use coroutines. Fennel runs on the Lua runtime, and Lua is famous for having very few features, but having carefully selected just the right features to include, and coroutines are one of those features that give a remarkable bang for their buck. But because most languages don't have them, they're often seen as an advanced or confusing feature, but they're not difficult, just different. Once you get a grasp on them, they provide a
In order to create a coroutine, you need a function to put inside it. Here's an example in Fennel 1 :
This is a written version of the talk I gave at FennelConf 2024 . If you prefer video to reading, give that a watch; it's about 20 minutes long.