두개 뽑아서 더하기

풀이 1

function solution(numbers) {
    let set = new Set()
    for(let i = 0; i< numbers.length; i++) {
        
        for(let j = 0; j< i; j++) {
            let plus = numbers[i] + numbers[j];
            set.add(plus);
        }
    }
    let newNum = Array.from(set);
    newNum.sort((a,b)=> a-b);
    return newNum
}

풀이 2 

function solution(numbers) {
    let array = []
    for(let i = 0; i< numbers.length; i++) {
        
        for(let j = 0; j< i; j++) {
            let plus = numbers[i] + numbers[j];
           if(array.includes(plus)) continue; else array.push(plus)
        }
    }
    array.sort((a,b)=> a-b);
    return console.log(array)
}

solution([5,0,2,7])