Function readNextNum

index.js:161–176

(interval)

const position = { value: 0 }

function readNextNum (interval) {
  let val = 0

  while (position.value < interval.length) {
    const char = interval[position.value]

    if (char >= '0' && char <= '9') {
      val = val * 10 + +char
      position.value++
    } else {
      break
    }
  }

  return val
}

function parseMillisecond (interval) {
  const previousPosition = position.value