M e n u

              
const pluckDeep = key => obj =>
  key.split('.').reduce((accum,
key) => accum[key], obj)

const compose = (...fns) => res =>
  fns.reduce((accum,
next) => next(accum), res)

const unfold = (f, seed) =>
{
  const go = (f, seed, acc) 
=> {
    const res = f(seed)
    return res ? go(f, 
res[1], acc.concat([res[0]]))
: acc
 }
  return go(f, seed, [])
}