quick user db as mapped key->val collection

mappedUserGen.js

const arrayMapper = (array, uniqueID) => array.reduce((acc, obj, index) => {
  if (!obj?.[uniqueID]) {
    console.error("🚀 ~ file: doodle.js ~ line 6 ~ arrayMapper ~ ", { obj, uniqueID, index })
    throw new Error('uniqueId no found')
  }
  acc[obj[uniqueID]] = obj
  return acc;
}, {})

function uuidv4() {
  return ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, c =>
    (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16)
  );
}

async function fetchUsers() {
  try {
    const response = await fetch('https://randomuser.me/api/?results=50')
    const students = await response.json()
    return [students, null]

  } catch (error) {
    console.log("🚀 ~ file: doodle.js ~ line 25 ~ fetchUsers ~ error", error)
    return [null, error]
  }
}

async function main() {
  try {

    const [response, error] = await fetchUsers();
    if (error) throw error

    const users = response.results;

    const uuidArr = []
    function setUserId(user) {
      const uuid = uuidv4()
      if (uuidArr.includes(uuid)) {
        setUserId(user)
      }
      uuidArr.push(uuid)
      user._id = uuid;
      return user;
    }

    users.forEach(setUserId)
    console.log("🚀 ~ file: doodle.js ~ line 52 ~ main ~ users", arrayMapper(users, '_id'))

  } catch (err) {
    console.log("🚀 ~ file: doodle.js ~ line 33 ~ main ~ error", err)

  }
}

main()