프로그래머스 코딩테스트 JavaScript 풀이 _키패드 누르기

다른 사람 풀이

function solution(numbers, hand){
    const keypad = {
        1:[0,3], 2:[1,3], 3:[2,3],
        4:[0,2], 5:[1,2], 6:[2,2],
        7:[0,1], 8:[1,1], 9:[2,1],
        '*':[0,0], 0:[1,0], '#':[2,0],
    }
    const len = numbers.length;
    let answer = '';
    let leftFinger = '*';
    let rightFinger = '#';
   
    for (let i = 0; i < len; i++) {
      let num = numbers[i];
    
      if (num % 3 === 1) {
      
        answer += "L";
        leftFinger = num;
      }
      
      else if (num !== 0 && num % 3 === 0) {
      
        answer += "R";
        rightFinger = num;
      }
 
      else {
        answer += getDistance(keypad, num, hand, leftFinger, rightFinger);
        
        answer[answer.length - 1] === "L"
          ? (leftFinger = num)
          : (rightFinger = num);
      }
    }

    return answer;

}

function getDistance(keypad, num, hand, leftFinger, rightFinger) {
  const handed = hand === "left" ? "L" : "R";
  const left =
    Math.abs(keypad[num][0] - keypad[leftFinger][0]) +
    Math.abs(keypad[num][1] - keypad[leftFinger][1]);
  const right =
    Math.abs(keypad[num][0] - keypad[rightFinger][0]) +
    Math.abs(keypad[num][1] - keypad[rightFinger][1]);

  if (left === right) return handed;

  return left < right ? "L" : "R";
}

- 몇 가지는 아이디어를 떠올렸는데, 결국 스스로 풀지는 못했다. ㅜㅜ 분발해야겠다!