프로그래머스 Java / Ruby : 행렬의 덧셈

https://school.programmers.co.kr/learn/courses/30/lessons/12950

프로그래머스

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- Java

class Solution {
    public int[][] solution(int[][] arr1, int[][] arr2) {
        int[][] answer = new int[arr1.length][arr1[0].length];
        for(int i=0;i<arr1.length;i++)
            for(int j=0;j<arr1[0].length;j++)
                answer[i][j]=arr1[i][j]+arr2[i][j];
        return answer;
    }
}

 

- Ruby

append가 있어 편리하다

def solution(arr1, arr2)
    answer = []
    for i in 0..arr1.length-1
        b=[]
        for j in 0..arr1[i].length-1
            puts 
            b.append(arr1[i][j]+arr2[i][j])
        end
        answer.append(b)
    end
    return answer
end