Question

How to use 2D array in class with Swift

Answer 1

class Test {
    var arr = [[Int]]()
    init() {
        for _ in 0..<10 {
            var row = [Int]()
            for _ in 0..<100 {
                row.append(0)
            }
            arr.append(row)
        }
    }
    subscript(row: Int, col: Int) -> Int {
        get {
            return arr[row][col]
        }
        set {
            arr[row][col] = newValue
        }
    }
}

var o = Test()

o[0, 5] = 234 
o[1, 2] = 876
o[3, 7] = o[0, 5]

print(o[0, 0]) 
print(o[0, 5])
print(o[1, 2])
print(o[3, 7])





/*
run:

0
234
876
234

*/

 

70+ SQL courses for beginners and professionals