public static void Main()
{
int[] arr = new int[] { 3, -1, 15, 4, 17, 2, 33, 0 };
Console.WriteLine("arr = [{0}]", string.Join(", ", arr));
SortUtils.SelectionSort(arr);
Console.WriteLine("sorted = [{0}]", string.Join(", ", arr));
// SortUtils.SelectionSort(new int[0]); // Test sorting empty array
SortUtils.SelectionSort(new int[1]); // Test sorting single element array
Console.WriteLine(SearchUtils.BinarySearch(arr, -1000));
Console.WriteLine(SearchUtils.BinarySearch(arr, 0));
Console.WriteLine(SearchUtils.BinarySearch(arr, 17));
Console.WriteLine(SearchUtils.BinarySearch(arr, 10));
Console.WriteLine(SearchUtils.BinarySearch(arr, 1000));
}
/// <summary>
/// Get the index of the first connection with the given source node ID.
/// </summary>
/// <param name="connList">The list of connections to search; these must be sorted by source node ID.</param>
/// <param name="srcNodeId">The source node ID to search for.</param>
/// <returns>The index of the first connection with the given source node index.</returns>
/// <remarks>
/// If srcNodeId is not found and is less than one or more elements in array, the negative number returned is
/// the bitwise complement of the index of the first connection that is larger than srcNodeId.
/// If value is not found and value is greater than all connections in array, the negative number returned is the
/// bitwise complement of the index of the last element plus 1.
/// </remarks>
public static int GetConnectionIndexBySourceNodeId(IList <DirectedConnection> connList, int srcNodeId)
{
// Search for a connection with the given source node ID.
int connIdx = SearchUtils.BinarySearch(connList, srcNodeId,
(DirectedConnection conn, int nodeId) => conn.SourceId.CompareTo(nodeId));
// Test for no match, i.e. no connections with the given source node ID.
if (connIdx < 0)
{
return(connIdx);
}
// Note. if there are multiple connections with the given source ID then BinarySearch() will
// return the index of one of them, but makes no guarantee regarding which one. As such we scan
// in reverse for the first connection.
for (; connIdx > 0 && connList[connIdx - 1].SourceId == srcNodeId; connIdx--)
{
;
}
return(connIdx);
}