Write a function that filters an array of numbers based on the criteria set for the number of digits.

Examples

filterByLength([12, 2000, 13, 1979, 12, 17], 2)  ➞ [12, 13, 12, 17]
// An array of only the numbers with 2 digits.

filterByLength([88, 232, 4, 9721, 555], 3) ➞ [232, 555]
// An array of only the numbers with 3 digits.

filterByLength([2, 7, 8, 9, 1012], 1) ➞ [2, 7, 8, 9]
// An array of only the numbers with a single digit.

filterByLength([32, 88, 74, 91, 300, 4050], 1) ➞ []
// No numbers with only 1 digit exist, thus, an empty array.

filterByLength([5, 6, 8, 9], 1) ➞ [5, 6, 8, 9]
// All numbers in the array have 1 digit only, thus, the original array.

Notes

• If no numbers of the specified digit length exist, return an empty array.
• If all numbers in the array have the specified digit length, return the original array.
• The returned sub-array should have the same relative order as the original array.