[프로그래머스/자바] 배열 두 배 만들기

class Solution {
    public int[] solution(int[] numbers) {
        for(int i=0; i<numbers.length; i++){
            numbers[i] *= 2;
        }
        return numbers;
    }
}

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import java.util.Arrays;

class Solution {
    public int[] solution(int[] numbers) {
        return Arrays.stream(numbers).map(i -> i * 2).toArray();
    }
}