strange-numbers.js

function gen_arr_from (start, length) {
  return Array(length).fill(start).map((v, i) => v + i).map(v => String.fromCodePoint(v))
}

const zeros = [0x24FF, 0x3007, 0x1F10B, 0x1F10C, 0x07C0, 0x104A0, 0x11136, 0x1C50, 0x1810, 0x0ED0, 0x1040, 0x17E0, 0x1946, 0x1BB0, 0xFF10, 0x19D0, 0x0D66, 0x0AE6, 0x1C40, 0x1A90, 0x1A80, 0x0CE6, 0x0C66, 0x09E6, 0x0A66, 0x0B66, 0x0BE6].map(v => String.fromCodePoint(v))
const zero_to_nines = [
  gen_arr_from(0x1D7CE, 10),
  gen_arr_from(0x1D7D8, 10),
  gen_arr_from(0x1D7E2, 10),
  gen_arr_from(0x1D7EC, 10),
  gen_arr_from(0x1D7F6, 10)
]
const one_to_nines = [
  gen_arr_from(0x2776, 9),
  gen_arr_from(0x2780, 9),
  gen_arr_from(0x278A, 9),
  gen_arr_from(0x2460, 9),
  gen_arr_from(0x2474, 9),
  gen_arr_from(0x24F5, 9)
]

module.exports = function transfrom (num_str) { // num_str must be the combination of 0123456789
  const input_numbers = String(num_str).trim().split('').map(v => Number(v))
  const dicts = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
  if (input_numbers.some(v => !dicts.includes(v))) throw new Error('invalid input: ' + num_str)
  const random_zero = zeros[~~(Math.random() * zeros.length)]
  const all_set = zero_to_nines.concat(one_to_nines.map(arr => [random_zero].concat(arr)))
  return input_numbers.map(v => {
    const random_set = all_set[~~(Math.random() * all_set.length)]
    return random_set[v]
  }).join('')
}