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Description
💬 문제
[코딩테스트 연습 - 행렬의 덧셈](https://school.programmers.co.kr/learn/courses/30/lessons/12950)
💬 풀이
func solution(_ arr1:[[Int]], _ arr2:[[Int]]) -> [[Int]] {
var result = arr1
for i in 0..<arr1.count {
for j in 0..<arr1[i].count {
result[i][j] = arr1[i][j] + arr2[i][j]
}
}
return result
}
💬 더 나은 방법?
func solution(_ arr1:[[Int]], _ arr2:[[Int]]) -> [[Int]] {
return zip(arr1, arr2).map{ zip($0, $1).map{ $0 + $1 } }
}