测试

import Foundation



let NumColumns = 9

let NumRows    = 9



class Level {

    private var cookies = Array2D<Cookie>(columns: NumRows, rows: NumRows)

    

    func cookieAtColumn(column: Int, row: Int) -> Cookie?{

        // here assert is a c function? not sure, check on that later

        // here the

        assert(column >= 0 && column < NumColumns)

        assert(row    >= 0 && row    < NumRows)

        

        return cookies[column, row]

    }

}