문제:
https://programmers.co.kr/learn/courses/30/lessons/42578?language=javascript
function solution(clothes) {
var answer = 1;
let dict = {};
for(let i = 0; i < clothes.length; i++){
if(dict[clothes[i][1]]){
dict[clothes[i][1]] += 1;
} else{
dict[clothes[i][1]] = 1;
}
}
for (let key of Object.keys(dict)){
answer *= (dict[key] + 1);
}
return answer - 1;
}
배운 것: