Ramda: Toggle Key of a Record using Lenses

toggle-key-in-record.ts

type key = string
type Records = Record<key, boolean>
  
const records: Records = {
  foo: false,
  bar: false
}

// key -> ((A -> B) -> Records -> Records) 
const setter = R.converge(
  R.over, 
  [R.lensProp, R.always(R.not)]
)

// key -> Records -> Records
const toggleKey = R.useWith(
  R.apply, [
    setter, R.identity
  ] 
)

toggleKey('foo', records) // Expected => {foo: true, bar: false}