<입문 100문제> Day 10 - 조건문, 배열, 수학, 시뮬레이션

문제

풀이

function solution(numbers, direction) {
    let answer = []
    if (direction === 'right') {
        numbers.unshift(numbers.pop())    
    } else if (direction === 'left') {
        numbers.push(numbers.shift())
    }
    
    answer = numbers
    
    return answer
}

해답

function solution(numbers, direction) {
  return direction === 'right'
    ? [numbers[numbers.length - 1], ...numbers.slice(0, numbers.length - 1)]
    : [...numbers.slice(1), numbers[0]];
}

function solution(numbers, direction) {
    let answer = [];

    if ("right" == direction) {
        numbers.unshift(numbers.pop());
    } else {
        numbers.push(numbers.shift());
    }

    answer = numbers;

    return answer;
}

참고자료

• JS Array method http://blog.302chanwoo.com/2017/08/javascript-array-method/