public void Test_MutableSpan2D_Compacting(int rowId)
{
var unused = new byte[1024];
var array = new ulong[, ]
{
{ 1, 2, 3 },
{ 4, 5, 6 }
};
Span2D <ulong> span2D = array.AsSpan2D();
Span <ulong> row = SpanExtensions.GetRow(span2D, rowId);
for (var i = 0; i < row.Length; i++)
{
Assert.AreEqual(array[rowId, i], row[i]);
}
GC.Collect(GC.MaxGeneration, GCCollectionMode.Forced, true, true);
GC.Collect(GC.MaxGeneration, GCCollectionMode.Forced, true, true);
for (var i = 0; i < row.Length; i++)
{
Assert.AreEqual(array[rowId, i], row[i]);
}
row[2] = 30;
Assert.AreEqual(30, array[rowId, 2]);
}
/// <summary>
/// Swaps the rows.
/// </summary>
/// <param name="matrix">The matrix.</param>
/// <param name="rows">The number of rows.</param>
/// <param name="columns">The number of columns.</param>
/// <param name="row1">The row1.</param>
/// <param name="row2">The row2.</param>
/// <returns></returns>
/// <acknowledgment>
/// https://github.com/GeorgiSGeorgiev/ExtendedMatrixCalculator
/// </acknowledgment>
public static void SwapRows(Span2D <double> matrix, int rows, int columns, int row1, int row2)
{
var temp_row = new double[columns];
for (var j = 0; j < columns; j++)
{
temp_row[j] = matrix[row1, j];
matrix[row1, j] = matrix[row2, j];
matrix[row2, j] = temp_row[j];
}
}
public static void SwapRows(Span2D <float> matrix, int row1, int row2)
{
var columns = matrix.Width;
var temp_row = new float[columns];
for (var j = 0; j < columns; j++)
{
temp_row[j] = matrix[row1, j];
matrix[row1, j] = matrix[row2, j];
matrix[row2, j] = temp_row[j];
}
}
