public static string RepeatedWords(string words)
{
if (words == null || words == "")
{
return(null);
}
HashTable myTable = new HashTable(100);
var rx = new Regex(@"\s+l,\s+", RegexOptions.Compiled);
string lowerCaseWords = words.ToLower();
string[] allWords = rx.Split(lowerCaseWords);
foreach (string word in allWords)
{
int index = HashTable.HashCode(word);
HashTable.Node current = myTable.Buckets[index];
if (myTable.Buckets[index] != null && current.Value == word)
{
return(word);
}
myTable.AddHash(word, word);
}
return(null);
}
public static List <int> TreeIntersection(BinarySearchTree <int> firstTree, BinarySearchTree <int> secondTree)
{
HashTable myTable = new HashTable(10);
List <int> result = new List <int>();
List <int> firstTreeValue = firstTree.PreOrder(firstTree.Root).ToList();
List <int> secondTreeValue = secondTree.PreOrder(secondTree.Root).ToList();
foreach (int value in firstTreeValue)
{
string keyOne = value.ToString();
myTable.AddHash(keyOne, null);
}
foreach (int value in secondTreeValue)
{
string keyTwo = value.ToString();
int currentIndex = HashTable.HashCode(keyTwo);
HashTable.Node current = myTable.Buckets[currentIndex];
while (current != null)
{
if (current.Value == value.ToString())
{
int match = value;
result.Add(match);
break;
}
else
{
current = current.Next;
}
}
}
return(result);
}