[프로그래머스] 음양 더하기 - JavaScript

📌 문제

https://programmers.co.kr/learn/courses/30/lessons/76501

📌 풀이

// 1
function solution(absolutes, signs) {
    let answer = 0;
    let numbers = [];
    
    for(let i = 0; i < signs.length; i++) {
        if(signs[i] === true) {
            numbers.push(absolutes[i]);
        } else {
            numbers.push(-absolutes[i]);
        }
    }
    
    for(let i = 0; i < numbers.length; i++) {
        answer += numbers[i];
    }
    
    return answer;
}

// 2
function solution(absolutes, signs) {
    let answer = 0;
    
    for(let i = 0; i < signs.length; i++) {
        if(signs[i] === true) {
            answer += absolutes[i];
        } else {
            answer -= absolutes[i];
        }
    }

    return answer;
}

// 3
function solution(absolutes, signs) {
    let answer = 0;
    
    signs.map((sign, i) => {
        sign === true ? answer += absolutes[i] : answer -= absolutes[i];
    })

    return answer;
}

// 다른 분의 풀이
function solution(absolutes, signs) {
    return absolutes.reduce((acc, val, i) => acc + (val * (signs[i] ? 1 : -1)), 0);
}