Anjana Vakil

Get started with functional programming in JS through this  series of explainers & interactive exercises. 

To access the full workshop, including video lessons, join FrontendMasters: frontendmasters.com/workshops/functional-first-steps

Functional JavaScript First Steps

index should be 0.

this should be postUpdate = update(0, "spelling", preUpdate)

Jacob Rus

third hardest problem in computer science lol

It looks like importing `produce` from `immer` has changed. Currently, the code `immer = require('immer')` results in an `RequireError: invalid module` error.