例如,我有这个矩阵:
var source = new[]
{
new[] { "r", "b", "g", "y" },
new[] { "r", "b", "g", "y" },
new[] { "r", string.Empty, "g", "y" },
new[] { "r", "b", "g", "y" }
}
我想首先将空字符串移到顶部位置,以创建相当于
的结果var result = new[]
{
new[] { "r", "string.Empty", "g", "y" },
new[] { "r", "b", "g", "y" },
new[] { "r", "b", "g", "y" },
new[] { "r", "b", "g", "y" }
}
我想将空字符串移动到右边,如果需要,可以创建等效于
的结果var result = new[]
{
new[] { "r", "g", "y", string.Empty },
new[] { "r", "b", "g", "y" },
new[] { "r", "b", "g", "y" },
new[] { "r", "b", "g", "y" }
}
到目前为止,这是我的代码
static void Moved(List<List<string>> list)
{
Console.WriteLine("Elements:");
检查清单
foreach (var sublist in list)
{
string empty = " ";
list[2][2] = empty;
检查子列表并访问列表中的元素
for (int i = 0; i < sublist.Count; i++)
{
if (sublist[2] == empty)
{
sublist[2] = sublist[3];
}
}
子列表中的值
foreach (var value in sublist)
{
Console.Write(value);
Console.Write(' ');
}
Console.WriteLine();
}
}
答案 0 :(得分:1)
这是另一个解决方案:
class Program
{
static void Main(string[] args)
{
var source = new[,]
{
{ "r", "b", "g", "y" },
{ "r", "b", "g", "y" },
{ "r", string.Empty, "g", "y" },
{ "r", "b", "g", "y" }
};
PrintArray(source);
Move(source, new pos() { row = 2, col = 1 }, new pos() { row = 0, col = 3 });
Console.ReadKey();
}
static void Move(string[,] arr, pos from, pos to)
{
MoveV(arr, from, to);
PrintArray(arr);
MoveH(arr, from, to);
PrintArray(arr);
}
// Moves an item verticaly.
static void MoveV(string[,] arr, pos from, pos to)
{
// Gets the distance to move.
int delta = to.row - from.row;
// Gets the direction of the movement (+ or -)
int mov = Math.Sign(delta);
// Moves an item.
for (int row = from.row, i = 0; i < Math.Abs(delta); row += mov, i++)
{
Swap(arr, new pos() { row = row, col = from.col }, new pos() { row = row + mov, col = from.col });
}
}
// Moves an item horizonataly.
static void MoveH(string[,] arr, pos from, pos to)
{
int delta = to.col - from.col;
int mov = Math.Sign(delta);
for (int col = from.col, i = 0; i < Math.Abs(delta); col += mov, i++)
{
Swap(arr, new pos() { row = to.row, col = col }, new pos() { row = to.row, col = col + mov });
}
}
// Swaps two items on each move.
static void Swap(string[,] arr, pos from, pos to)
{
string val = arr[to.row, to.col];
arr[to.row, to.col] = arr[from.row, from.col];
arr[from.row, from.col] = val;
}
// Print the array to the console.
static void PrintArray(string[,] arr)
{
StringBuilder sb = new StringBuilder();
for (int i = 0; i < 4; i++)
{
sb.AppendLine(string.Format("{0} {1} {2} {3}", getval(arr, i, 0), getval(arr, i, 1), getval(arr, i, 2), getval(arr, i, 3)));
}
sb.AppendLine("");
Console.Write(sb.ToString());
}
static string getval(string[,] arr, int row, int col)
{
return string.IsNullOrWhiteSpace(arr[row, col]) ? " " : arr[row, col];
}
}
struct pos
{
public int row;
public int col;
}
编辑:
在Move
方法中记录一个错误(从/到硬编码)。