접미사인지 확인하기

https://school.programmers.co.kr/learn/courses/30/lessons/181908

function solution(my_string, is_suffix) {
 for (let i = 0; i<my_string.length; i++) {
     if (my_string.slice(i) === is_suffix) {
       return 1
     }
 }
  return 0
}