Function BoundedDigits

postalcodes.go:233–246

BoundedDigits generates a string of N random digits, padded with zeros if necessary. The output is restricted to the given range.

(digits, low, high int)

// BoundedDigits generates a string of N random digits, padded with zeros if necessary.
// The output is restricted to the given range.
func BoundedDigits(digits, low, high int) string {
	if low > high {
		low, high = high, low
	}

	max := int(math.Pow10(digits)) - 1
	if high > max {
		high = max
	}

	num := privateRand.Intn(high-low+1) + low
	format := fmt.Sprintf("%%0%dd", digits)
	return fmt.Sprintf(format, num)
}