Enumerate through props quickly

prop-enumerations.js

function seedPossibilitiesCount(seed) {
  if (Array.isArray(seed)) {
    return seed.length
  } else if (typeof seed === 'object' && !!seed && seed.constructor === Object) {
    let count = 1
    Object.keys(seed).forEach(k => {
      count *= seedPossibilitiesCount(seed[k])
    })
    return count
  }
  return 1
}

function seedToProp(seed, iteration) {
  if (Array.isArray(seed)) {
    return seed[iteration % seed.length]
  } else if (typeof seed === 'object' && !!seed && seed.constructor === Object) {
    const prop = {}
    let divisor = 1
    Object.keys(seed).map(k => {
      const possibilityCounts = seedPossibilitiesCount(seed[k])
      const localIteration = Math.floor(iteration / divisor) % possibilityCounts
      divisor *= possibilityCounts
      prop[k] = seedToProp(seed[k], localIteration)
    })
    return prop
  }
  return seed
}

function* allEnumerations(seed) {
  for (let i = 0; i < seedPossibilitiesCount(seed); i++) {
    yield seedToProp(seed, i)
  }
}

// Demo

const BoolSeed = [true, false]
const TodoSeed = {
  thing: 'Water Plant',
  done: BoolSeed,
}

for (prop of allEnumerations(TodoSeed)) {
  console.log(prop)
}