Leapfrogging types with Traversable

Brian Lonsdorf

InstructorBrian Lonsdorf

JavaScript∞

Share this video with your friends

We use the traversable instance on List to reimplement Promise.all() type functionality.

illustration for Professor Frisby Introduces Composable Functional JavaScript

Course

Professor Frisby Introduces Composable Functional JavaScript

Tre' Codez

Tre' Codez

~ 4 years ago

Hey Dr B! I'm getting an error on the first example. When we apply fn to readFile() I'm getting Callback must be a function.