/// <summary>
/// Array subscripting with extending boundary conditions.
/// </summary>
public static void ExtPut <T>(Narray <T> a, int i, int j, T value)
{
i = Math.Max(0, Math.Min(i, a.Dim(0) - 1));
j = Math.Max(0, Math.Min(j, a.Dim(1) - 1));
a.UnsafePut(i, j, value);
}
