Андрей Пастухов

const groupedByType = array.reduce((acc, item) => {
  const arr = acc[item.type] || []
  arr.push(item)
  acc[item.type] = arr
  return acc
}, {})

for (let i = 0; i <= 9999; i++) {
  const value = i.toString().padStart(4, '0')
  console.log(value)
}