public static List <UnweightedNode <T> > UnweightedDepthFirstSearch <T>(UnweightedNode <T> start)
{
List <UnweightedNode <T> > nodes = new List <UnweightedNode <T> >();
HashSet <UnweightedNode <T> > visited = new HashSet <UnweightedNode <T> >();
DepthFirstSearch.TraverseUnweightedDepthFirstSearch(start, nodes, visited);
return(nodes);
}
private static void TraverseUnweightedDepthFirstSearch <T>(UnweightedNode <T> start, List <UnweightedNode <T> > nodes, HashSet <UnweightedNode <T> > visited)
{
nodes.Add(start);
visited.Add(start);
foreach (UnweightedNode <T> neighbor in start.GetNeighborsInOrder())
{
if (!visited.Contains(neighbor))
{
DepthFirstSearch.TraverseUnweightedDepthFirstSearch(neighbor, nodes, visited);
}
}
}
public static void TestUnweighted()
{
string[] order = new string[] { "root", "apple", "banana", "red", "yellow" };
Dictionary <string, UnweightedNode <string> > nodes = new Dictionary <string, UnweightedNode <string> >();
foreach (string key in order)
{
UnweightedNode <string> node = new UnweightedNode <string>(key);
nodes[key] = node;
}
Dictionary <string, string[]> adjacencies = new Dictionary <string, string[]>
{
{ "root", new string[] { "apple", "banana" } },
{ "apple", new string[] { "red", "yellow" } },
{ "banana", new string[] { "yellow" } },
{ "red", new string[0] },
{ "yellow", new string[0] }
};
foreach (string key in order)
{
UnweightedNode <string> node = nodes[key];
string[] neighborKeys = adjacencies[key];
foreach (string neighborKey in neighborKeys)
{
node.AddNeighbor(nodes[neighborKey]);
Console.WriteLine(string.Format("{0} borders {1}", key, neighborKey));
}
}
foreach (UnweightedNode <string> node in DepthFirstSearch.UnweightedDepthFirstSearch(nodes["root"]))
{
Console.WriteLine(node.Data);
}
}