public static IEnumerable <BSTNode <string, string> > GetAllStartWith(this DuplicableSimpleBSTree <string, string> tree, char letter)
{
if (tree == null)
{
throw new ArgumentNullException("Tree is null");
}
return(tree.BFS().Distinct().Where(node => node.Key[0] == letter));
}
public static void WriteText(this DuplicableSimpleBSTree <string, string> tree, Stream stream)
{
using (var writer = new StreamWriter(stream))
{
foreach (var item in tree.BFS())
{
writer.WriteLine(item.Value);
}
}
}