코테용 snippet

[voidmatcha]

key 기준으로 object 정렬하기

const dict = {
  'b': 100,
  'a': 200,
  'b': 300,
};

const orderedAnswer = Object.keys(dictScore)
  .sort()
  .reduce((obj, key) => {
    obj[key] = dictScore[key];
    return obj;
  }, {});

배열에 같은 숫자 카운트 Map, Object 만들기

https://dongmin-jang.medium.com/javascript-15%EA%B0%80%EC%A7%80-%EC%9C%A0%EC%9A%A9%ED%95%9C-map-reduce-filter-bfbc74f0debd

배열 빼기

const minusArray = (completeArray, targetArray) => {
    return targetArray.map(eachIndex => {
        const resultOfMinusArray = [];
        completeArray.forEach((each) => {
            if (!eachIndex.includes(each)) {
                resultOfMinusArray.push(each);
            }
        })
        return resultOfMinusArray;
    })
}