Get a string represnetation of an integer in any base

toBase.js

/**
 * Transform a number to any base based on a provided range.
 * TODO: doesn't support floats.
 * @param {number} baseTen A regular, primitive integer number
 * @param {Array<string>} range And array of characters to represent the positional system.
 * @returns {string} A representation of the provided number in the positional system provided.
 */
const toBase = (baseTen, range = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.split('')) => {
  if (baseTen % 1 > 0) throw new TypeError('Only integers are supported')
  if (baseTen === 0) return range[0]

  let reminder = baseTen
  let result = ''

  while (reminder > 0) {
    result = range[reminder % range.length] + result
    reminder = (reminder - (reminder % range.length)) / range.length
  }

  return result
}

export default toBase