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;
 })
}