객체의 동적 할당 키 값

const reducer = (acc: any, recode: IRecode) => {
  const nowCategoryName = recode.category;
  const convertMinTime = convertMinute(calNowTime(recode.startTime,
    recode.endTime ? recode.endTime : nowHourMin()));
  if (nowCategoryName in acc) {
    return {
      ...acc,
      [nowCategoryName]: acc[nowCategoryName] + convertMinTime,
    };
  }
  return {
    ...acc,
    [nowCategoryName]: convertMinTime,
  };
};