public void PrefixMatchTest()
{
string s = @"
In computer science, a trie, or prefix tree,
is an ordered tree data structure that is used to
store an associative array where the keys are strings.
Unlike a binary search tree, no node in the tree
stores the key associated with that node;
instead, its position in the tree shows what key
it is associated with. All the descendants
of any one node have a common prefix of the string
associated with that node, and the root is associated
with the empty string. Values are normally not associated
with every node, only with leaves and some inner nodes
that happen to correspond to keys of interest.
" ;
Trie <char, string> wordIndex = new Trie <char, string>(new LettersDomain());
foreach (string word in s.Replace("\r", "").Replace("\n", " ").Replace("\t", "").Split(' ', ',', ';', '.'))
{
if (word.Length > 0)
{
wordIndex.Add(word, word);
}
}
ITrieEnumerator <char, string> matches = wordIndex.PrefixMatch("p");
while (matches.MoveNext())
{
Console.WriteLine(matches.Current.Value);
}
}
public void TestTrie()
{
Trie <char, string> wordIndex = new Trie <char, string>(new LettersDomain());
wordIndex.Add("a", "a");
wordIndex.Add("aa", "aa");
wordIndex.Add("ab", "ab");
wordIndex.Add("ab", "ab2");
wordIndex.Add("abc", "abc");
wordIndex.Add("b", "b");
wordIndex.Add("ba", "ba");
wordIndex.Add("ba", "ba2");
wordIndex.Add("ba", "ba3");
wordIndex.Add("ba", "ba4");
wordIndex.Add("c", "c");
wordIndex.Add("cd", "cd");
int max;
//PrintTreeRecursive(wordIndex.root, -1, "");
//Console.WriteLine(" -------------------------------- ");
//ITrieEnumerator<char, IList<string>> iterator = wordIndex.All1;
//Console.WriteLine(" MoveNext: -------------------------------- ");
//while (iterator.MoveNext())
//{
// Console.WriteLine("{0}: {1}", new string(new List<char>(iterator.Current.Key).ToArray()), iterator.Current.Value[0]);
//}
//Console.WriteLine(" MovePrevious: -------------------------------- ");
//while (iterator.MovePrevious())
//{
// Console.WriteLine("{0}: {1}", new string(new List<char>(iterator.Current.Key).ToArray()), iterator.Current.Value[0]);
//}
//Console.WriteLine(" MoveNext: -------------------------------- ");
//while (iterator.MoveNext())
//{
// Console.WriteLine("{0}: {1}", new string(new List<char>(iterator.Current.Key).ToArray()), iterator.Current.Value[0]);
//}
//Console.WriteLine(" MovePrevious: -------------------------------- ");
//int max = 6;
//while (--max > 0 && iterator.MovePrevious())
//{
// Console.WriteLine("{0}: {1}", new string(new List<char>(iterator.Current.Key).ToArray()), iterator.Current.Value[0]);
//}
//Console.WriteLine(" MoveNext: -------------------------------- ");
//max = 4;
//while (--max > 0 && iterator.MoveNext())
//{
// Console.WriteLine("{0}: {1}", new string(new List<char>(iterator.Current.Key).ToArray()), iterator.Current.Value[0]);
//}
//Console.WriteLine(" MovePrevious: -------------------------------- ");
//max = 5;
//while (--max > 0 && iterator.MovePrevious())
//{
// Console.WriteLine("{0}: {1}", new string(new List<char>(iterator.Current.Key).ToArray()), iterator.Current.Value[0]);
//}
Console.WriteLine(" -------------------------------- ");
Console.WriteLine(" -------------------------------- ");
ITrieEnumerator <char, string> iterator2 = wordIndex.All;
while (iterator2.MoveNext())
{
Console.WriteLine(iterator2.Current.Value);
}
Console.WriteLine(" -------------------------------- ");
while (iterator2.MovePrevious())
{
Console.WriteLine(iterator2.Current.Value);
}
Console.WriteLine(" -------------------------------- ");
while (iterator2.MoveNext())
{
Console.WriteLine(iterator2.Current.Value);
}
Console.WriteLine(" -------------------------------- ");
max = 6;
while (--max > 0 && iterator2.MovePrevious())
{
Console.WriteLine(iterator2.Current.Value);
}
Console.WriteLine(" MoveNext: -------------------------------- ");
max = 4;
while (--max > 0 && iterator2.MoveNext())
{
Console.WriteLine(iterator2.Current.Value);
}
Console.WriteLine(" MovePrevious: -------------------------------- ");
max = 5;
while (--max > 0 && iterator2.MovePrevious())
{
Console.WriteLine(iterator2.Current.Value);
}
}