public static Grid MakeMove(Grid grid, Move move)
{
var newGrid = new int[4, 4];
switch (move)
{
case Move.Left:
for (var y = 0; y < 4; y++)
{
var nonZeroes = merge(grid.GetRow(y).Where(n => n != 0).ToArray());
var l = nonZeroes.Length;
for (var i = 0; i < l; i++)
{
newGrid[i, y] = nonZeroes[i];
}
}
break;
case Move.Right:
for (var y = 0; y < 4; y++)
{
var nonZeroes = merge(grid.GetRow(y).Where(n => n != 0).ToArray().Reverse().ToArray()).Reverse().ToArray();
var l = nonZeroes.Length;
for (var i = 0; i < l; i++)
{
newGrid[i + (4-l), y] = nonZeroes[i];
}
}
break;
case Move.Up:
for (var x = 0; x < 4; x++)
{
var nonZeroes = merge(grid.GetColumn(x).Where(n => n != 0).ToArray());
var l = nonZeroes.Length;
for (var i = 0; i < l; i++)
{
newGrid[x, i] = nonZeroes[i];
}
}
break;
case Move.Down:
for (var x = 0; x < 4; x++)
{
var nonZeroes = merge(grid.GetColumn(x).Where(n => n != 0).ToArray().Reverse().ToArray()).Reverse().ToArray();
var l = nonZeroes.Length;
for (var i = 0; i < l; i++)
{
newGrid[x, i + (4-l)] = nonZeroes[i];
}
}
break;
default:
throw new ArgumentOutOfRangeException("move");
}
return new Grid(newGrid);
}
