객체 value값들로 key찾기

function getKeyByValue(object, value) {
  return Object.keys(object).find(key => object[key] === value);
}

for(let i=0; i< k ;i++){
    Object.keys(map).find(key => {
      if(map[key] === array[i]){
        result.push(parseInt(key))
      }
    })

let a = Object.values(obj);
    a.sort((a, b) => b - a);

    a.map((el) => {
        Object.keys(obj).find((key) => {
            if (obj[key] === el) {
                answer.push(parseInt(key));
            }
        });
    });