frame number generator

gen.js

const mod10CheckDigit = require('mod10-check-digit') // single digit check digit

const scheme_id = 1
const generation_id = 1
const totalbikes = 15
const cache = []

function getRandomInt() {
  return Math.floor(Math.random() * 90 + 10)
}

function generate() {
  const n = `${scheme_id}${generation_id}${getRandomInt()}`

  const check_num = mod10CheckDigit(n).toString()
  return `${n}${check_num}`
}

while (cache.length != totalbikes) {
  const frame_number = generate()
  if (!cache.includes(frame_number)) {
    console.log(frame_number)
    cache.push(frame_number)
  }
}