inout便利貼

CatEatSwift

//inout類似C++傳遞引用
var image = [
    [3, 7, 10],
    [6, 4, 2],
    [8, 5, 4]
]

func raiseLowerValueOfImage(_ image:inout [[Int]]) {
    for row in 0..<image.count {
        for color in 0..<image[row].count {
            image[row][color]
            if (image[row][color] < 5) {
                image[row][color] = 5
            }
        }
    }
    image
}

raiseLowerValueOfImage(&image)

image