last-digits-of-a-number.js

/* Your job is to implement a function which returns the last D digits of an integer N as a list.

Special cases:
If D > (the number of digits of N), return all the digits.
If D <= 0, return an empty list.
Examples:
N = 1
D = 1
result = [1]

N = 1234
D = 2
result = [3, 4]

N = 637547
D = 6
result = [6, 3, 7, 5, 4, 7]

*/

//solution

function lastDigit(n, d) {
    return (n + '').split('').splice(-d,d).map(Number)
  }