[JavaScript] 프로그래머스 튜플 LEVEL2

문제출처

function solution(s) {
    const answer = [];
    const str = s.substring(1, s.length - 1);
    let arr = [];
    let nowArr = [];
    let now = '';
    
    for (let i=0; i<str.length; i++) {
        if (str[i] === '{') continue;
        else if (str[i] === '}') {
            nowArr.push(+now);
            arr.push(nowArr);
            nowArr = [];
            now = '';
        }
        else if (str[i] === ',') {
            if (str[i-1] === '}') continue;
            nowArr.push(+now);
            now = '';
        } else {
            now += str[i];
        }
    }
    arr = arr.sort((a,b) => a.length - b.length)
    
    for (const a of arr) {
        const tmp = a.filter(v => !answer.includes(v))[0];
        answer.push(tmp)
    }
    
    return answer;
}