[64065] 튜플

https://programmers.co.kr/learn/courses/30/lessons/64065

코딩테스트 연습 - 튜플

 

function solution(s) {
  let answer = [];
  const array = eval(s.replace(/{/g, "[").replace(/}/g, "]")).flat();
  const countObj = {};
  const sortObj = [];
  array.forEach((x) => {
    countObj[x] = (countObj[x] || 0) + 1;
  });
  for (let n in countObj) {
    sortObj.push([n, countObj[n]]);
  }
  sortObj.sort(function (a, b) {
    return b[1] - a[1];
  });
  answer = sortObj.map((v) => Number(v[0]));
  return answer;
}