[프로그래머스 문제풀이5]키패드 누르기 자바스크립트

function solution(numbers, hand) {
    let answer =''
    let leftNum=10;
    let rightNum=12;
    const xy={}
      for(var i=0;i<4;i++)
        {
            for(var j=0;j<3;j++){
                xy[j+i*3+1]=[i,j]
                console.log(i,j)
            }
        }

    for(let number of numbers){
        if(number==="*")
            number=10;
        if(number==="#")
            number=12
        if(number===0)
            number=11
        if(number === 3 || number === 6 || number === 9){
            answer+="R";
            rightNum=number;
            continue;
        }
        if(number === 1 || number === 4 || number === 7){
            answer+="L";
            leftNum=number;
            continue;
        }
        
            const leftGap=getDistance(xy,leftNum,number);
            const rightGap=getDistance(xy,rightNum,number);
            
            if(leftGap===rightGap){
                if(hand==="right"){
                    answer+="R"
                    rightNum=number;
                    continue;
                }
                if(hand==="left"){
                    answer+="L"
                    leftNum=number;
                    continue;
                }       
            }
            if(leftGap>rightGap){
                 answer+="R"
                    rightNum=number;
                    continue;
            }
            if(leftGap<rightGap){
                  answer+="L"
                    leftNum=number;   
                    continue;
            }
            
        
        
    }
    return answer;
}
const getDistance = (xy,locatedNumber, target) => {
  

  const nowPosition = xy[locatedNumber];
  const targetPosition = xy[target];

  return Math.abs(targetPosition[0] - nowPosition[0]) + Math.abs(targetPosition[1] - nowPosition[1]);
};

사실 모범답안을 보고 조금 고쳤다.
일일히 따져가면서 하기보다는 좌표로 보는게 더 쉽다 .