[프로그래머스] 키패드 누르기 (JS)

문제

https://school.programmers.co.kr/learn/courses/30/lessons/67256

프로그래머스

코드

function solution(numbers, hand) {
    let answer = '';
    
    const keypadPos = [[3,1],[0,0],[0,1],[0,2],[1,0],[1,1],[1,2],[2,0],[2,1],[2,2]];
    
    let lPos =[3,0];
    let rPos =[3,2];
    
    for(num of numbers){
        if(num===1||num===4||num===7){
            answer+='L';
            lPos=keypadPos[num];
        }else if(num===3||num===6||num===9){
            answer+='R';
            rPos=keypadPos[num];
        }else{
            let lDist = Math.abs(keypadPos[num][0]-lPos[0])+Math.abs(keypadPos[num][1]-lPos[1])
            let rDist = Math.abs(keypadPos[num][0]-rPos[0])+Math.abs(keypadPos[num][1]-rPos[1])
            if(lDist<rDist){
                answer+='L';
                lPos=keypadPos[num];
            }else if(lDist>rDist){
                answer+='R';
                rPos=keypadPos[num];
            }else{
                if(hand==='left'){
                    answer+='L';
                    lPos=keypadPos[num];
                }else{
                    answer+='R';
                    rPos=keypadPos[num];
                }
            }
        }
    }
    return answer;
}