Filter by Digit Length

Create a function that filters out an array to include numbers that only have a certain number of digits.

Examples

filterDigitLength([88, 232, 4, 9721, 555], 3) ➞ [232, 555]
// Include only numbers with 3 digits.

filterDigitLength([2, 7, 8, 9, 1012], 1) ➞ [2, 7, 8, 9]
// Include only numbers with 1 digit.

filterDigitLength([32, 88, 74, 91, 300, 4050], 1) ➞ []
// No numbers with only 1 digit exist => return empty array.

filterDigitLength([5, 6, 8, 9], 1) ➞ [5, 6, 8, 9]
// All numbers in the array have 1 digit only => return 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 sub-array returned should have the same relative order as the original array.