# Ternary Search Tree Deletion

Here given code implementation process.

``````// C program for
// Ternary Search Tree Deletion
#include <stdio.h>
#include <stdlib.h>

// Ternary search tree Node
struct TreeNode
{
char data;
int terminate;
struct TreeNode *left;
struct TreeNode *eq;
struct TreeNode *right;
};
struct TernarySearchTree
{
struct TreeNode *root;
};
// Create and return new tree
struct TernarySearchTree *newTree()
{
// Create a dynamic node
struct TernarySearchTree *tree =
(struct TernarySearchTree *) malloc(sizeof(struct TernarySearchTree));
if (tree != NULL)
{
tree->root = NULL;
}
else
{
printf("Memory Overflow to Create tree Tree\n");
exit(0);
}
// Return new tree
return tree;
}
// Create new node of tree
struct TreeNode *newTreeNode(char data)
{
struct TreeNode *node =
(struct TreeNode *) malloc(sizeof(struct TreeNode));
if (node == NULL)
{
// Memory overflow
exit(0);
}
node->left = NULL;
node->eq = NULL;
node->right = NULL;
node->data = data;
node->terminate = 0;
return node;
}
// A recursive function to traverse Ternary Search Tree
void traverseTSTUtil(struct TreeNode *node, char *output, int depth)
{
if (node != NULL)
{
// First traverse the left subtree
traverseTSTUtil(node->left, output, depth);
// Store the character of this node
output[depth] = node->data;
if (node->terminate)
{
output[depth + 1] = '\0';
printf(" %s\n", output);
}
// Traverse the subtree using equal pointer (middle subtree)
traverseTSTUtil(node->eq, output, depth + 1);
// Finally Traverse the right subtree
traverseTSTUtil(node->right, output, depth);
}
}
// Calculate height of tree
int treeHeight(struct TreeNode *node)
{
if (node != NULL)
{
// Find height of subtree using recursion
int a = treeHeight(node->left);
int b = treeHeight(node->right);
// Returns the height of largest subtree
if (a > b)
{
return a + 1;
}
else
{
return b + 1;
}
}
else
{
return 0;
}
}
void traverseTST(struct TreeNode *root)
{
if (root == NULL)
{
return;
}
int h = treeHeight(root) + 1;
char output[h];
traverseTSTUtil(root, output, 0);
}
// Function to insert a new word in a Ternary Search Tree
struct TreeNode *insert(struct TreeNode *root, char *word)
{
struct TreeNode *node = root;
if (root == NULL)
{
node = newTreeNode( *word);
}
if (( *word) < node->data)
{
node->left = insert(node->left, word);
}
else if (( *word) > node->data)
{
node->right = insert(node->right, word);
}
else
{
if ( *(word + 1))
{
node->eq = insert(node->eq, word + 1);
}
else
{
node->terminate = 1;
}
}
return node;
}
// Handles the request of add new node
void addNode(struct TernarySearchTree *tree, char *word)
{
tree->root = insert(tree->root, word);
}
int countSiblings(struct TreeNode *node)
{
int count = 0;
if (node->left != NULL)
{
count++;
}
if (node->right != NULL)
{
count++;
}
if (node->eq != NULL)
{
count++;
}
return count;
}
struct TreeNode *deleteWord(struct TreeNode *node, char *word)
{
if (node == NULL)
{
// When delete node not exist
return NULL;
}
int child = countSiblings(node);
if ( *word < node->data)
{
node->left = deleteWord(node->left, word);
}
else if ( *word > node->data)
{
node->right = deleteWord(node->right, word);
}
else
{
if ( *(word + 1))
{
// When word not empty
node->eq = deleteWord(node->eq, word + 1);
}
else if (node->terminate == 1)
{
if (child > 0)
{
// In case child node exist of deleted word
node->terminate = 0;
}
else
{
free(node);
return NULL;
}
}
}
if (child != countSiblings(node) && child == 1 && node->terminate == 0)
{
// When need to remove node
free(node);
return NULL;
}
return node;
}
int main()
{
struct TernarySearchTree *tree = newTree();
printf(" Ternary search tree\n");
traverseTST(tree->root);
// Case A
char *word = "fee";
printf("\n Delete word : %s \n", word);
tree->root = deleteWord(tree->root, word);
printf(" Ternary search tree\n");
traverseTST(tree->root);
// Case B
word = "code";
printf("\n Delete word : %s \n", word);
tree->root = deleteWord(tree->root, word);
printf(" Ternary search tree\n");
traverseTST(tree->root);
// Case C
word = "milks";
printf("\n Delete word : %s \n", word);
tree->root = deleteWord(tree->root, word);
printf(" Ternary search tree\n");
traverseTST(tree->root);
// Case D
word = "feel";
printf("\n Delete word : %s \n", word);
tree->root = deleteWord(tree->root, word);
printf(" Ternary search tree\n");
traverseTST(tree->root);
return 0;
}``````

#### input

`````` Ternary search tree
co
code
fee
feel
milk
run

Delete word : fee
Ternary search tree
co
code
feel
milk
run

Delete word : code
Ternary search tree
co
feel
milk
run

Delete word : milks
Ternary search tree
co
feel
milk
run

Delete word : feel
Ternary search tree
co
milk
run``````
``````/*
Java Program
Ternary Search Tree Deletion
*/
// Ternary search tree
class TreeNode
{
public char data;
public boolean terminate;
public TreeNode left;
public TreeNode equal;
public TreeNode right;
public TreeNode(char data)
{
this.data = data;
this.left = null;
this.right = null;
this.equal = null;
this.terminate = false;
}
}
public class TernarySearchTree
{
public TreeNode root;
public TernarySearchTree()
{
this.root = null;
}
// Print the all words using recursion
public void printWords(TreeNode node, String output, int depth)
{
if (node != null)
{
// Visit left subtree
printWords(node.left, output, depth);
if (node.terminate == true)
{
// Display word
System.out.print(" " + (output + node.data) + "\n");
}
// Visit equal (middle) subtree
printWords(node.equal, output + node.data, depth + 1);
// Visit left subtree
printWords(node.right, output, depth);
}
}
// Function to insert a new word in a Ternary Search Tree
public TreeNode insert(TreeNode rootNode, String word, int position)
{
TreeNode node = rootNode;
if (rootNode == null)
{
node = new TreeNode(word.charAt(position));
}
if (word.charAt(position) < node.data)
{
node.left = insert(node.left, word, position);
}
else if (word.charAt(position) > node.data)
{
node.right = insert(node.right, word, position);
}
else
{
if ((position + 1) < word.length())
{
node.equal = insert(node.equal, word, position + 1);
}
else
{
node.terminate = true;
}
}
return node;
}
// Handles the request of add new node
public void addNode(String word)
{
if (word.length() == 0)
{
return;
}
this.root = insert(this.root, word, 0);
}
public boolean searchElement(TreeNode node, String word, int position)
{
if (node == null)
{
return false;
}
else if (word.charAt(position) < node.data)
{
return searchElement(node.left, word, position);
}
else if (word.charAt(position) > node.data)
{
return searchElement(node.right, word, position);
}
else
{
if (position + 1 < word.length())
{
// When word not empty
return searchElement(node.equal, word, position + 1);
}
else
{
// returns status to terminate word
return node.terminate;
}
}
}
// Handles the request of search word
public void searchTreeNode(String word)
{
System.out.print("\n Given : [" + word + "] \n");
if (word.length() > 0
&& this.searchElement(root, word, 0) == true)
{
System.out.print(" Found\n");
}
else
{
}
}
public int countSiblings(TreeNode node)
{
int count = 0;
if (node.left != null)
{
count++;
}
if (node.right != null)
{
count++;
}
if (node.equal != null)
{
count++;
}
return count;
}
public TreeNode deleteWord(TreeNode node, String word, int position)
{
if (node == null)
{
// When delete node not exist
return null;
}
int child = countSiblings(node);
if (word.charAt(position) < node.data)
{
node.left = deleteWord(node.left, word, position);
}
else if (word.charAt(position) > node.data)
{
node.right = deleteWord(node.right, word, position);
}
else
{
if ((position + 1) < word.length())
{
// When word not empty
node.equal = deleteWord(node.equal, word, position + 1);
}
else if (node.terminate == true)
{
if (child > 0)
{
// In case child node exist of deleted word
node.terminate = false;
}
else
{
return null;
}
}
}
if (child != countSiblings(node)
&& child == 1 && node.terminate == false)
{
// When need to remove node
return null;
}
return node;
}
public static void main(String[] args)
{
TernarySearchTree tree = new TernarySearchTree();
System.out.print(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
// Case A
String word = "fee";
System.out.print("\n Delete word : " + word + " \n");
tree.root = tree.deleteWord(tree.root, word, 0);
System.out.print(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
// Case B
word = "code";
System.out.print("\n Delete word : " + word + " \n");
tree.root = tree.deleteWord(tree.root, word, 0);
System.out.print(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
// Case C
word = "milks";
System.out.print("\n Delete word : " + word + " \n");
tree.root = tree.deleteWord(tree.root, word, 0);
System.out.print(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
// Case D
word = "feel";
System.out.print("\n Delete word : " + word + " \n");
tree.root = tree.deleteWord(tree.root, word, 0);
System.out.print(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
}
}``````

#### input

`````` Ternary search tree
co
code
fee
feel
milk
run

Delete word : fee
Ternary search tree
co
code
feel
milk
run

Delete word : code
Ternary search tree
co
feel
milk
run

Delete word : milks
Ternary search tree
co
feel
milk
run

Delete word : feel
Ternary search tree
co
milk
run``````
``````// Include namespace system
using System;
/*
Csharp Program
Ternary Search Tree Deletion
*/
// Ternary search tree
public class TreeNode
{
public char data;
public Boolean terminate;
public TreeNode left;
public TreeNode equal;
public TreeNode right;
public TreeNode(char data)
{
this.data = data;
this.left = null;
this.right = null;
this.equal = null;
this.terminate = false;
}
}
public class TernarySearchTree
{
public TreeNode root;
public TernarySearchTree()
{
this.root = null;
}
// Print the all words using recursion
public void printWords(TreeNode node, String output, int depth)
{
if (node != null)
{
// Visit left subtree
this.printWords(node.left, output, depth);
if (node.terminate == true)
{
// Display word
Console.Write(" " + (output + node.data) + "\n");
}
// Visit equal (middle) subtree
this.printWords(node.equal, output + node.data, depth + 1);
// Visit left subtree
this.printWords(node.right, output, depth);
}
}
// Function to insert a new word in a Ternary Search Tree
public TreeNode insert(TreeNode rootNode, String word, int position)
{
TreeNode node = rootNode;
if (rootNode == null)
{
node = new TreeNode(word[position]);
}
if (word[position] < node.data)
{
node.left = this.insert(node.left, word, position);
}
else if (word[position] > node.data)
{
node.right = this.insert(node.right, word, position);
}
else
{
if ((position + 1) < word.Length)
{
node.equal = this.insert(node.equal, word, position + 1);
}
else
{
node.terminate = true;
}
}
return node;
}
// Handles the request of add new node
public void addNode(String word)
{
if (word.Length == 0)
{
return;
}
this.root = this.insert(this.root, word, 0);
}
public Boolean searchElement(TreeNode node, String word, int position)
{
if (node == null)
{
return false;
}
else if (word[position] < node.data)
{
return this.searchElement(node.left, word, position);
}
else if (word[position] > node.data)
{
return this.searchElement(node.right, word, position);
}
else
{
if (position + 1 < word.Length)
{
// When word not empty
return this.searchElement(node.equal, word, position + 1);
}
else
{
// returns status to terminate word
return node.terminate;
}
}
}
// Handles the request of search word
public void searchTreeNode(String word)
{
Console.Write("\n Given : [" + word + "] \n");
if (word.Length > 0 && this.searchElement(this.root, word, 0) == true)
{
Console.Write(" Found\n");
}
else
{
}
}
public int countSiblings(TreeNode node)
{
int count = 0;
if (node.left != null)
{
count++;
}
if (node.right != null)
{
count++;
}
if (node.equal != null)
{
count++;
}
return count;
}
public TreeNode deleteWord(TreeNode node, String word, int position)
{
if (node == null)
{
// When delete node not exist
return null;
}
int child = this.countSiblings(node);
if (word[position] < node.data)
{
node.left = this.deleteWord(node.left, word, position);
}
else if (word[position] > node.data)
{
node.right = this.deleteWord(node.right, word, position);
}
else
{
if ((position + 1) < word.Length)
{
// When word not empty
node.equal = this.deleteWord(node.equal, word, position + 1);
}
else if (node.terminate == true)
{
if (child > 0)
{
// In case child node exist of deleted word
node.terminate = false;
}
else
{
return null;
}
}
}
if (child != this.countSiblings(node)
&& child == 1 && node.terminate == false)
{
// When need to remove node
return null;
}
return node;
}
public static void Main(String[] args)
{
TernarySearchTree tree = new TernarySearchTree();
Console.Write(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
// Case A
String word = "fee";
Console.Write("\n Delete word : " + word + " \n");
tree.root = tree.deleteWord(tree.root, word, 0);
Console.Write(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
// Case B
word = "code";
Console.Write("\n Delete word : " + word + " \n");
tree.root = tree.deleteWord(tree.root, word, 0);
Console.Write(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
// Case C
word = "milks";
Console.Write("\n Delete word : " + word + " \n");
tree.root = tree.deleteWord(tree.root, word, 0);
Console.Write(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
// Case D
word = "feel";
Console.Write("\n Delete word : " + word + " \n");
tree.root = tree.deleteWord(tree.root, word, 0);
Console.Write(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
}
}``````

#### input

`````` Ternary search tree
co
code
fee
feel
milk
run

Delete word : fee
Ternary search tree
co
code
feel
milk
run

Delete word : code
Ternary search tree
co
feel
milk
run

Delete word : milks
Ternary search tree
co
feel
milk
run

Delete word : feel
Ternary search tree
co
milk
run``````
``````// Include header file
#include <iostream>

#include <string>

using namespace std;
/*
C++ Program
Ternary Search Tree Deletion
*/
// Ternary search tree
class TreeNode
{
public: char data;
bool terminate;
TreeNode *left;
TreeNode *equal;
TreeNode *right;
TreeNode()
{
this->left = NULL;
this->right = NULL;
this->equal = NULL;
}
TreeNode(char data)
{
this->data = data;
this->left = NULL;
this->right = NULL;
this->equal = NULL;
this->terminate = false;
}
};
class TernarySearchTree
{
public: TreeNode *root;
TernarySearchTree()
{
this->root = NULL;
}
// Print the all words using recursion
void printWords(TreeNode *node, string output, int depth)
{
if (node != NULL)
{
// Visit left subtree
this->printWords(node->left, output, depth);
if (node->terminate == true)
{
// Display word
cout << " " << (output + node->data) << "\n";
}
// Visit equal (middle) subtree
this->printWords(node->equal, output + node->data, depth + 1);
// Visit left subtree
this->printWords(node->right, output, depth);
}
}
// Function to insert a new word in a Ternary Search Tree
TreeNode *insert(TreeNode *rootNode, string word, int position)
{
TreeNode *node = rootNode;
if (rootNode == NULL)
{
node = new TreeNode(word[position]);
}
if (word[position] < node->data)
{
node->left = this->insert(node->left, word, position);
}
else if (word[position] > node->data)
{
node->right = this->insert(node->right, word, position);
}
else
{
if ((position + 1) < word.length())
{
node->equal = this->insert(node->equal, word, position + 1);
}
else
{
node->terminate = true;
}
}
return node;
}
// Handles the request of add new node
{
if (word.length() == 0)
{
return;
}
this->root = this->insert(this->root, word, 0);
}
bool searchElement(TreeNode *node, string word, int position)
{
if (node == NULL)
{
return false;
}
else if (word[position] < node->data)
{
return this->searchElement(node->left, word, position);
}
else if (word[position] > node->data)
{
return this->searchElement(node->right, word, position);
}
else
{
if (position + 1 < word.length())
{
// When word not empty
return this->searchElement(node->equal, word, position + 1);
}
else
{
// returns status to terminate word
return node->terminate;
}
}
}
// Handles the request of search word
void searchTreeNode(string word)
{
cout << "\n Given : [" << word << "] \n";
if (word.length() > 0
&& this->searchElement(this->root, word, 0) == true)
{
cout << " Found\n";
}
else
{
}
}
int countSiblings(TreeNode *node)
{
int count = 0;
if (node->left != NULL)
{
count++;
}
if (node->right != NULL)
{
count++;
}
if (node->equal != NULL)
{
count++;
}
return count;
}
TreeNode *deleteWord(TreeNode *node, string word, int position)
{
if (node == NULL)
{
cout << " Delete word not found \n";
// When delete node not exist
return NULL;
}
int child = this->countSiblings(node);
if (word[position] < node->data)
{
node->left = this->deleteWord(node->left, word, position);
}
else if (word[position] > node->data)
{
node->right = this->deleteWord(node->right, word, position);
}
else
{
if ((position + 1) < word.length())
{
// When word not empty
node->equal = this->deleteWord(node->equal, word, position + 1);
}
else if (node->terminate == true)
{
if (child > 0)
{
// In case child node exist of deleted word
node->terminate = false;
}
else
{
delete node;
return NULL;
}
}
}
if (child != this->countSiblings(node)
&& child == 1 && node->terminate == false)
{
delete node;
// When need to remove node
return NULL;
}
return node;
}
};
int main()
{
TernarySearchTree *tree = new TernarySearchTree();
cout << " Ternary search tree\n";
tree->printWords(tree->root, "", 0);
// Case A
string word = "fee";
cout << "\n Delete word : " << word << " \n";
tree->root = tree->deleteWord(tree->root, word, 0);
cout << " Ternary search tree\n";
tree->printWords(tree->root, "", 0);
// Case B
word = "code";
cout << "\n Delete word : " << word << " \n";
tree->root = tree->deleteWord(tree->root, word, 0);
cout << " Ternary search tree\n";
tree->printWords(tree->root, "", 0);
// Case C
word = "milks";
cout << "\n Delete word : " << word << " \n";
tree->root = tree->deleteWord(tree->root, word, 0);
cout << " Ternary search tree\n";
tree->printWords(tree->root, "", 0);
// Case D
word = "feel";
cout << "\n Delete word : " << word << " \n";
tree->root = tree->deleteWord(tree->root, word, 0);
cout << " Ternary search tree\n";
tree->printWords(tree->root, "", 0);
return 0;
}``````

#### input

`````` Ternary search tree
co
code
fee
feel
milk
run

Delete word : fee
Ternary search tree
co
code
feel
milk
run

Delete word : code
Ternary search tree
co
feel
milk
run

Delete word : milks
Ternary search tree
co
feel
milk
run

Delete word : feel
Ternary search tree
co
milk
run``````
``````<?php
/*
Php Program
Ternary Search Tree Deletion
*/
// Ternary search tree
class TreeNode
{
public \$data;
public \$terminate;
public \$left;
public \$equal;
public \$right;
public	function __construct(\$data)
{
\$this->data = \$data;
\$this->left = NULL;
\$this->right = NULL;
\$this->equal = NULL;
\$this->terminate = false;
}
}
class TernarySearchTree
{
public \$root;
public	function __construct()
{
\$this->root = NULL;
}
// Print the all words using recursion
public	function printWords(\$node, \$output, \$depth)
{
if (\$node != NULL)
{
// Visit left subtree
\$this->printWords(\$node->left, \$output, \$depth);
if (\$node->terminate == true)
{
// Display word
echo(" ".(\$output.\$node->data).
"\n");
}
// Visit equal (middle) subtree
\$this->printWords(\$node->equal,
\$output.strval(\$node->data), \$depth + 1);
// Visit left subtree
\$this->printWords(\$node->right, \$output, \$depth);
}
}
// Function to insert a new word in a Ternary Search Tree
public	function insert(\$rootNode, \$word, \$position)
{
\$node = \$rootNode;
if (\$rootNode == NULL)
{
\$node = new TreeNode(\$word[\$position]);
}
if (\$word[\$position] < \$node->data)
{
\$node->left = \$this->insert(\$node->left, \$word, \$position);
}
else if (\$word[\$position] > \$node->data)
{
\$node->right = \$this->insert(\$node->right, \$word, \$position);
}
else
{
if ((\$position + 1) < strlen(\$word))
{
\$node->equal = \$this->insert(\$node->equal, \$word, \$position + 1);
}
else
{
\$node->terminate = true;
}
}
return \$node;
}
// Handles the request of add new node
{
if (strlen(\$word) == 0)
{
return;
}
\$this->root = \$this->insert(\$this->root, \$word, 0);
}
public	function searchElement(\$node, \$word, \$position)
{
if (\$node == NULL)
{
return false;
}
else if (\$word[\$position] < \$node->data)
{
return \$this->searchElement(\$node->left, \$word, \$position);
}
else if (\$word[\$position] > \$node->data)
{
return \$this->searchElement(\$node->right, \$word, \$position);
}
else
{
if (\$position + 1 < strlen(\$word))
{
// When word not empty
return \$this->searchElement(\$node->equal, \$word, \$position + 1);
}
else
{
// returns status to terminate word
return \$node->terminate;
}
}
}
// Handles the request of search word
public	function searchTreeNode(\$word)
{
echo("\n Given : [".\$word.
"] \n");
if (strlen(\$word) > 0
&& \$this->searchElement(\$this->root, \$word, 0) == true)
{
echo(" Found\n");
}
else
{
}
}
public	function countSiblings(\$node)
{
\$count = 0;
if (\$node->left != NULL)
{
\$count++;
}
if (\$node->right != NULL)
{
\$count++;
}
if (\$node->equal != NULL)
{
\$count++;
}
return \$count;
}
public	function deleteWord(\$node, \$word, \$position)
{
if (\$node == NULL)
{
// When delete node not exist
return NULL;
}
\$child = \$this->countSiblings(\$node);
if (\$word[\$position] < \$node->data)
{
\$node->left = \$this->deleteWord(\$node->left, \$word, \$position);
}
else if (\$word[\$position] > \$node->data)
{
\$node->right = \$this->deleteWord(\$node->right, \$word, \$position);
}
else
{
if ((\$position + 1) < strlen(\$word))
{
// When word not empty
\$node->equal = \$this->deleteWord(\$node->equal, \$word, \$position + 1);
}
else if (\$node->terminate == true)
{
if (\$child > 0)
{
// In case child node exist of deleted word
\$node->terminate = false;
}
else
{
return NULL;
}
}
}
if (\$child != \$this->countSiblings(\$node)
&& \$child == 1 && \$node->terminate == false)
{
// When need to remove node
return NULL;
}
return \$node;
}
}

function main()
{
\$tree = new TernarySearchTree();
echo(" Ternary search tree\n");
\$tree->printWords(\$tree->root, "", 0);
// Case A
\$word = "fee";
echo("\n Delete word : ".\$word.
" \n");
\$tree->root = \$tree->deleteWord(\$tree->root, \$word, 0);
echo(" Ternary search tree\n");
\$tree->printWords(\$tree->root, "", 0);
// Case B
\$word = "code";
echo("\n Delete word : ".\$word.
" \n");
\$tree->root = \$tree->deleteWord(\$tree->root, \$word, 0);
echo(" Ternary search tree\n");
\$tree->printWords(\$tree->root, "", 0);
// Case C
\$word = "milks";
echo("\n Delete word : ".\$word.
" \n");
\$tree->root = \$tree->deleteWord(\$tree->root, \$word, 0);
echo(" Ternary search tree\n");
\$tree->printWords(\$tree->root, "", 0);
// Case D
\$word = "feel";
echo("\n Delete word : ".\$word.
" \n");
\$tree->root = \$tree->deleteWord(\$tree->root, \$word, 0);
echo(" Ternary search tree\n");
\$tree->printWords(\$tree->root, "", 0);
}
main();``````

#### input

`````` Ternary search tree
co
code
fee
feel
milk
run

Delete word : fee
Ternary search tree
co
code
feel
milk
run

Delete word : code
Ternary search tree
co
feel
milk
run

Delete word : milks
Ternary search tree
co
feel
milk
run

Delete word : feel
Ternary search tree
co
milk
run``````
``````/*
Node JS Program
Ternary Search Tree Deletion
*/
// Ternary search tree
class TreeNode
{
constructor(data)
{
this.data = data;
this.left = null;
this.right = null;
this.equal = null;
this.terminate = false;
}
}
class TernarySearchTree
{
constructor()
{
this.root = null;
}
// Print the all words using recursion
printWords(node, output, depth)
{
if (node != null)
{
// Visit left subtree
this.printWords(node.left, output, depth);
if (node.terminate == true)
{
// Display word
process.stdout.write(" " + (output + node.data) + "\n");
}
// Visit equal (middle) subtree
this.printWords(node.equal, output + node.data, depth + 1);
// Visit left subtree
this.printWords(node.right, output, depth);
}
}
// Function to insert a new word in a Ternary Search Tree
insert(rootNode, word, position)
{
var node = rootNode;
if (rootNode == null)
{
node = new TreeNode(word.charAt(position));
}
if (word.charAt(position) < node.data)
{
node.left = this.insert(node.left, word, position);
}
else if (word.charAt(position) > node.data)
{
node.right = this.insert(node.right, word, position);
}
else
{
if ((position + 1) < word.length)
{
node.equal = this.insert(node.equal, word, position + 1);
}
else
{
node.terminate = true;
}
}
return node;
}
// Handles the request of add new node
{
if (word.length == 0)
{
return;
}
this.root = this.insert(this.root, word, 0);
}
searchElement(node, word, position)
{
if (node == null)
{
return false;
}
else if (word.charAt(position) < node.data)
{
return this.searchElement(node.left, word, position);
}
else if (word.charAt(position) > node.data)
{
return this.searchElement(node.right, word, position);
}
else
{
if (position + 1 < word.length)
{
// When word not empty
return this.searchElement(node.equal, word, position + 1);
}
else
{
// returns status to terminate word
return node.terminate;
}
}
}
// Handles the request of search word
searchTreeNode(word)
{
process.stdout.write("\n Given : [" + word + "] \n");
if (word.length > 0
&& this.searchElement(this.root, word, 0) == true)
{
process.stdout.write(" Found\n");
}
else
{
}
}
countSiblings(node)
{
var count = 0;
if (node.left != null)
{
count++;
}
if (node.right != null)
{
count++;
}
if (node.equal != null)
{
count++;
}
return count;
}
deleteWord(node, word, position)
{
if (node == null)
{
// When delete node not exist
return null;
}
var child = this.countSiblings(node);
if (word.charAt(position) < node.data)
{
node.left = this.deleteWord(node.left, word, position);
}
else if (word.charAt(position) > node.data)
{
node.right = this.deleteWord(node.right, word, position);
}
else
{
if ((position + 1) < word.length)
{
// When word not empty
node.equal = this.deleteWord(node.equal, word, position + 1);
}
else if (node.terminate == true)
{
if (child > 0)
{
// In case child node exist of deleted word
node.terminate = false;
}
else
{
return null;
}
}
}
if (child != this.countSiblings(node)
&& child == 1 && node.terminate == false)
{
// When need to remove node
return null;
}
return node;
}
}

function main()
{
var tree = new TernarySearchTree();
process.stdout.write(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
// Case A
var word = "fee";
process.stdout.write("\n Delete word : " + word + " \n");
tree.root = tree.deleteWord(tree.root, word, 0);
process.stdout.write(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
// Case B
word = "code";
process.stdout.write("\n Delete word : " + word + " \n");
tree.root = tree.deleteWord(tree.root, word, 0);
process.stdout.write(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
// Case C
word = "milks";
process.stdout.write("\n Delete word : " + word + " \n");
tree.root = tree.deleteWord(tree.root, word, 0);
process.stdout.write(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
// Case D
word = "feel";
process.stdout.write("\n Delete word : " + word + " \n");
tree.root = tree.deleteWord(tree.root, word, 0);
process.stdout.write(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
}
main();``````

#### input

`````` Ternary search tree
co
code
fee
feel
milk
run

Delete word : fee
Ternary search tree
co
code
feel
milk
run

Delete word : code
Ternary search tree
co
feel
milk
run

Delete word : milks
Ternary search tree
co
feel
milk
run

Delete word : feel
Ternary search tree
co
milk
run``````
``````#    Python 3 Program
#    Ternary Search Tree Deletion

#  Ternary search tree
class TreeNode :
def __init__(self, data) :
self.data = data
self.left = None
self.right = None
self.equal = None
self.terminate = False

class TernarySearchTree :
def __init__(self) :
self.root = None

#  Print the all words using recursion
def printWords(self, node, output, depth) :
if (node != None) :
#  Visit left subtree
self.printWords(node.left, output, depth)
if (node.terminate == True) :
#  Display word
print(" ", (output + node.data) )

#  Visit equal (middle) subtree
self.printWords(node.equal,
output + str(node.data),
depth + 1)
#  Visit left subtree
self.printWords(node.right, output, depth)

#  Function to insert a new word in a Ternary Search Tree
def insert(self, rootNode, word, position) :
node = rootNode
if (rootNode == None) :
node = TreeNode(word[position])

if (word[position] < node.data) :
node.left = self.insert(node.left, word, position)
elif (word[position] > node.data) :
node.right = self.insert(node.right, word, position)
else :
if ((position + 1) < len(word)) :
node.equal = self.insert(node.equal, word, position + 1)
else :
node.terminate = True

return node

#  Handles the request of add new node
def addNode(self, word) :
if (len(word) == 0) :
return

self.root = self.insert(self.root, word, 0)

def searchElement(self, node, word, position) :
if (node == None) :
return False
elif (word[position] < node.data) :
return self.searchElement(node.left, word, position)
elif (word[position] > node.data) :
return self.searchElement(node.right, word, position)
else :
if (position + 1 < len(word)) :
#  When word not empty
return self.searchElement(node.equal, word, position + 1)
else :
#  returns status to terminate word
return node.terminate

#  Handles the request of search word
def searchTreeNode(self, word) :
print("\n Given : [", word ,"] ")
if (len(word) > 0 and
self.searchElement(self.root, word, 0) == True) :
print(" Found")
else :

def countSiblings(self, node) :
count = 0
if (node.left != None) :
count += 1

if (node.right != None) :
count += 1

if (node.equal != None) :
count += 1

return count

def deleteWord(self, node, word, position) :
if (node == None) :
#  When delete node not exist
return None

child = self.countSiblings(node)
if (word[position] < node.data) :
node.left = self.deleteWord(node.left, word, position)
elif (word[position] > node.data) :
node.right = self.deleteWord(node.right, word, position)
else :
if ((position + 1) < len(word)) :
#  When word not empty
node.equal = self.deleteWord(node.equal, word, position + 1)
elif (node.terminate == True) :
if (child > 0) :
#  In case child node exist of deleted word
node.terminate = False
else :
return None

if (child != self.countSiblings(node) and child == 1 and node.terminate == False) :
#  When need to remove node
return None

return node

def main() :
tree = TernarySearchTree()
print(" Ternary search tree")
tree.printWords(tree.root, "", 0)
#  Case A
word = "fee"
print("\n Delete word : ", word ," ")
tree.root = tree.deleteWord(tree.root, word, 0)
print(" Ternary search tree")
tree.printWords(tree.root, "", 0)
#  Case B
word = "code"
print("\n Delete word : ", word ," ")
tree.root = tree.deleteWord(tree.root, word, 0)
print(" Ternary search tree")
tree.printWords(tree.root, "", 0)
#  Case C
word = "milks"
print("\n Delete word : ", word ," ")
tree.root = tree.deleteWord(tree.root, word, 0)
print(" Ternary search tree")
tree.printWords(tree.root, "", 0)
#  Case D
word = "feel"
print("\n Delete word : ", word ," ")
tree.root = tree.deleteWord(tree.root, word, 0)
print(" Ternary search tree")
tree.printWords(tree.root, "", 0)

if __name__ == "__main__": main()``````

#### input

`````` Ternary search tree
co
code
fee
feel
milk
run

Delete word :  fee
Ternary search tree
co
code
feel
milk
run

Delete word :  code
Ternary search tree
co
feel
milk
run

Delete word :  milks
Ternary search tree
co
feel
milk
run

Delete word :  feel
Ternary search tree
co
milk
run``````
``````#    Ruby Program
#    Ternary Search Tree Deletion

#  Ternary search tree
class TreeNode
# Define the accessor and reader of class TreeNode
attr_reader :data, :terminate, :left, :equal, :right
attr_accessor :data, :terminate, :left, :equal, :right
def initialize(data)
self.data = data
self.left = nil
self.right = nil
self.equal = nil
self.terminate = false
end

end

class TernarySearchTree
# Define the accessor and reader of class TernarySearchTree
attr_accessor :root
def initialize()
self.root = nil
end

#  Print the all words using recursion
def printWords(node, output, depth)
if (node != nil)
#  Visit left subtree
self.printWords(node.left, output, depth)
if (node.terminate == true)
#  Display word
print(" ", (output + node.data) ,"\n")
end

#  Visit equal (middle) subtree
self.printWords(node.equal, output + node.data.to_s, depth + 1)
#  Visit left subtree
self.printWords(node.right, output, depth)
end

end

#  Function to insert a new word in a Ternary Search Tree
def insert(rootNode, word, position)
node = rootNode
if (rootNode == nil)
node = TreeNode.new(word[position])
end

if (word[position] < node.data)
node.left = self.insert(node.left, word, position)
elsif (word[position] > node.data)
node.right = self.insert(node.right, word, position)
else

if ((position + 1) < word.length)
node.equal = self.insert(node.equal, word, position + 1)
else

node.terminate = true
end

end

return node
end

#  Handles the request of add new node
if (word.length == 0)
return
end

self.root = self.insert(self.root, word, 0)
end

def searchElement(node, word, position)
if (node == nil)
return false
elsif (word[position] < node.data)
return self.searchElement(node.left, word, position)
elsif (word[position] > node.data)
return self.searchElement(node.right, word, position)
else

if (position + 1 < word.length)
#  When word not empty
return self.searchElement(node.equal, word, position + 1)
else

#  returns status to terminate word
return node.terminate
end

end

end

#  Handles the request of search word
def searchTreeNode(word)
print("\n Given : [", word ,"] \n")
if (word.length > 0 && self.searchElement(self.root, word, 0) == true)
print(" Found\n")
else

end

end

def countSiblings(node)
count = 0
if (node.left != nil)
count += 1
end

if (node.right != nil)
count += 1
end

if (node.equal != nil)
count += 1
end

return count
end

def deleteWord(node, word, position)
if (node == nil)
#  When delete node not exist
return nil
end

child = self.countSiblings(node)
if (word[position] < node.data)
node.left = self.deleteWord(node.left, word, position)
elsif (word[position] > node.data)
node.right = self.deleteWord(node.right, word, position)
else

if ((position + 1) < word.length)
#  When word not empty
node.equal = self.deleteWord(node.equal, word, position + 1)
elsif (node.terminate == true)
if (child > 0)
#  In case child node exist of deleted word
node.terminate = false
else

return nil
end

end

end

if (child != self.countSiblings(node) &&
child == 1 && node.terminate == false)
#  When need to remove node
return nil
end

return node
end

end

def main()
tree = TernarySearchTree.new()
print(" Ternary search tree\n")
tree.printWords(tree.root, "", 0)
#  Case A
word = "fee"
print("\n Delete word : ", word ," \n")
tree.root = tree.deleteWord(tree.root, word, 0)
print(" Ternary search tree\n")
tree.printWords(tree.root, "", 0)
#  Case B
word = "code"
print("\n Delete word : ", word ," \n")
tree.root = tree.deleteWord(tree.root, word, 0)
print(" Ternary search tree\n")
tree.printWords(tree.root, "", 0)
#  Case C
word = "milks"
print("\n Delete word : ", word ," \n")
tree.root = tree.deleteWord(tree.root, word, 0)
print(" Ternary search tree\n")
tree.printWords(tree.root, "", 0)
#  Case D
word = "feel"
print("\n Delete word : ", word ," \n")
tree.root = tree.deleteWord(tree.root, word, 0)
print(" Ternary search tree\n")
tree.printWords(tree.root, "", 0)
end

main()``````

#### input

`````` Ternary search tree
co
code
fee
feel
milk
run

Delete word : fee
Ternary search tree
co
code
feel
milk
run

Delete word : code
Ternary search tree
co
feel
milk
run

Delete word : milks
Ternary search tree
co
feel
milk
run

Delete word : feel
Ternary search tree
co
milk
run
``````
``````import scala.collection.mutable._;
/*
Scala Program
Ternary Search Tree Deletion
*/
// Ternary search tree
class TreeNode(var data: Char,
var terminate: Boolean,
var left: TreeNode,
var equal: TreeNode,
var right: TreeNode)
{
def this(data: Char)
{
this(data,false,null,null,null);
}
}
class TernarySearchTree(var root: TreeNode)
{
def this()
{
this(null);
}
// Print the all words using recursion
def printWords(node: TreeNode, output: String, depth: Int): Unit = {
if (node != null)
{
// Visit left subtree
printWords(node.left, output, depth);
if (node.terminate == true)
{
// Display word
print(" " + (output + node.data) + "\n");
}
// Visit equal (middle) subtree
printWords(node.equal,
output + node.data.toString(),
depth + 1);
// Visit left subtree
printWords(node.right, output, depth);
}
}
// Function to insert a new word in a Ternary Search Tree
def insert(rootNode: TreeNode, word: String, position: Int): TreeNode = {
var node: TreeNode = rootNode;
if (rootNode == null)
{
node = new TreeNode(word.charAt(position));
}
if (word.charAt(position) < node.data)
{
node.left = insert(node.left, word, position);
}
else if (word.charAt(position) > node.data)
{
node.right = insert(node.right, word, position);
}
else
{
if ((position + 1) < word.length())
{
node.equal = insert(node.equal, word, position + 1);
}
else
{
node.terminate = true;
}
}
return node;
}
// Handles the request of add new node
def addNode(word: String): Unit = {
if (word.length() == 0)
{
return;
}
this.root = insert(this.root, word, 0);
}
def searchElement(node: TreeNode, word: String, position: Int): Boolean = {
if (node == null)
{
return false;
}
else if (word.charAt(position) < node.data)
{
return searchElement(node.left, word, position);
}
else if (word.charAt(position) > node.data)
{
return searchElement(node.right, word, position);
}
else
{
if (position + 1 < word.length())
{
// When word not empty
return searchElement(node.equal, word, position + 1);
}
else
{
// returns status to terminate word
return node.terminate;
}
}
}
// Handles the request of search word
def searchTreeNode(word: String): Unit = {
print("\n Given : [" + word + "] \n");
if (word.length() > 0 &&
this.searchElement(root, word, 0) == true)
{
print(" Found\n");
}
else
{
}
}
def countSiblings(node: TreeNode): Int = {
var count: Int = 0;
if (node.left != null)
{
count += 1;
}
if (node.right != null)
{
count += 1;
}
if (node.equal != null)
{
count += 1;
}
return count;
}
def deleteWord(node: TreeNode, word: String, position: Int): TreeNode = {
if (node == null)
{
// When delete node not exist
return null;
}
var child: Int = countSiblings(node);
if (word.charAt(position) < node.data)
{
node.left = deleteWord(node.left, word, position);
}
else if (word.charAt(position) > node.data)
{
node.right = deleteWord(node.right, word, position);
}
else
{
if ((position + 1) < word.length())
{
// When word not empty
node.equal = deleteWord(node.equal, word, position + 1);
}
else if (node.terminate == true)
{
if (child > 0)
{
// In case child node exist of deleted word
node.terminate = false;
}
else
{
return null;
}
}
}
if (child != countSiblings(node) &&
child == 1 && node.terminate == false)
{
// When need to remove node
return null;
}
return node;
}
}
object Main
{
def main(args: Array[String]): Unit = {
var tree: TernarySearchTree = new TernarySearchTree();
print(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
// Case A
var word: String = "fee";
print("\n Delete word : " + word + " \n");
tree.root = tree.deleteWord(tree.root, word, 0);
print(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
// Case B
word = "code";
print("\n Delete word : " + word + " \n");
tree.root = tree.deleteWord(tree.root, word, 0);
print(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
// Case C
word = "milks";
print("\n Delete word : " + word + " \n");
tree.root = tree.deleteWord(tree.root, word, 0);
print(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
// Case D
word = "feel";
print("\n Delete word : " + word + " \n");
tree.root = tree.deleteWord(tree.root, word, 0);
print(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
}
}``````

#### input

`````` Ternary search tree
co
code
fee
feel
milk
run

Delete word : fee
Ternary search tree
co
code
feel
milk
run

Delete word : code
Ternary search tree
co
feel
milk
run

Delete word : milks
Ternary search tree
co
feel
milk
run

Delete word : feel
Ternary search tree
co
milk
run``````
``````/*
Kotlin Program
Ternary Search Tree Deletion
*/
// Ternary search tree
class TreeNode
{
var data: Char;
var terminate: Boolean;
var left: TreeNode ? ;
var equal: TreeNode ? ;
var right: TreeNode ? ;
constructor(data: Char)
{
this.data = data;
this.left = null;
this.right = null;
this.equal = null;
this.terminate = false;
}
}
class TernarySearchTree
{
var root: TreeNode ? ;
constructor()
{
this.root = null;
}
// Print the all words using recursion
fun printWords(node: TreeNode ? , output : String, depth: Int): Unit
{
if (node != null)
{
// Visit left subtree
this.printWords(node.left, output, depth);
if (node.terminate == true)
{
// Display word
print(" " + (output + node.data) + "\n");
}
// Visit equal (middle) subtree
this.printWords(node.equal,
output + node.data.toString(),
depth + 1);
// Visit left subtree
this.printWords(node.right, output, depth);
}
}
// Function to insert a new word in a Ternary Search Tree
fun insert(rootNode: TreeNode ? , word : String, position: Int): TreeNode ?
{
var node: TreeNode ? = rootNode;
if (rootNode == null)
{
node = TreeNode(word.get(position));
}
if (word.get(position) < node!!.data)
{
node.left = this.insert(node.left, word, position);
}
else if (word.get(position) > node.data)
{
node.right = this.insert(node.right, word, position);
}
else
{
if ((position + 1) < word.length)
{
node.equal = this.insert(node.equal, word, position + 1);
}
else
{
node.terminate = true;
}
}
return node;
}
// Handles the request of add new node
fun addNode(word: String): Unit
{
if (word.length == 0)
{
return;
}
this.root = this.insert(this.root, word, 0);
}
fun searchElement(node: TreeNode ? , word : String, position: Int): Boolean
{
if (node == null)
{
return false;
}
else if (word.get(position) < node.data)
{
return this.searchElement(node.left, word, position);
}
else if (word.get(position) > node.data)
{
return this.searchElement(node.right, word, position);
}
else
{
if (position + 1 < word.length)
{
// When word not empty
return this.searchElement(node.equal, word, position + 1);
}
else
{
// returns status to terminate word
return node.terminate;
}
}
}
// Handles the request of search word
fun searchTreeNode(word: String): Unit
{
print("\n Given : [" + word + "] \n");
if (word.length > 0 && this.searchElement(this.root, word, 0) == true)
{
print(" Found\n");
}
else
{
}
}
fun countSiblings(node: TreeNode ? ): Int
{
var count: Int = 0;
if (node?.left != null)
{
count += 1;
}
if (node?.right != null)
{
count += 1;
}
if (node?.equal != null)
{
count += 1;
}
return count;
}
fun deleteWord(node: TreeNode ? , word : String, position: Int): TreeNode ?
{
if (node == null)
{
// When delete node not exist
return null;
}
val child: Int = this.countSiblings(node);
if (word.get(position) < node.data)
{
node.left = this.deleteWord(node.left, word, position);
}
else if (word.get(position) > node.data)
{
node.right = this.deleteWord(node.right, word, position);
}
else
{
if ((position + 1) < word.length)
{
// When word not empty
node.equal = this.deleteWord(node.equal, word, position + 1);
}
else if (node.terminate == true)
{
if (child > 0)
{
// In case child node exist of deleted word
node.terminate = false;
}
else
{
return null;
}
}
}
if (child != this.countSiblings(node)
&& child == 1 && node.terminate == false)
{
// When need to remove node
return null;
}
return node;
}
}
fun main(args: Array < String > ): Unit
{
val tree: TernarySearchTree = TernarySearchTree();
print(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
// Case A
var word: String = "fee";
print("\n Delete word : " + word + " \n");
tree.root = tree.deleteWord(tree.root, word, 0);
print(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
// Case B
word = "code";
print("\n Delete word : " + word + " \n");
tree.root = tree.deleteWord(tree.root, word, 0);
print(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
// Case C
word = "milks";
print("\n Delete word : " + word + " \n");
tree.root = tree.deleteWord(tree.root, word, 0);
print(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
// Case D
word = "feel";
print("\n Delete word : " + word + " \n");
tree.root = tree.deleteWord(tree.root, word, 0);
print(" Ternary search tree\n");
tree.printWords(tree.root, "", 0);
}``````

#### input

`````` Ternary search tree
co
code
fee
feel
milk
run

Delete word : fee
Ternary search tree
co
code
feel
milk
run

Delete word : code
Ternary search tree
co
feel
milk
run

Delete word : milks
Ternary search tree
co
feel
milk
run

Delete word : feel
Ternary search tree
co
milk
run``````
``````package main
import "fmt"
/*
Go Program
Ternary Search Tree Deletion
*/
// Ternary search tree
type TreeNode struct {
data byte
terminate bool
left * TreeNode
equal * TreeNode
right * TreeNode
}
func getTreeNode(data byte) * TreeNode {
var me *TreeNode = &TreeNode {}
me.data = data
me.left = nil
me.right = nil
me.equal = nil
me.terminate = false
return me
}
type TernarySearchTree struct {
root * TreeNode
}
func getTernarySearchTree() * TernarySearchTree {
var me *TernarySearchTree = &TernarySearchTree {}
me.root = nil
return me
}
// Print the all words using recursion
func(this TernarySearchTree) printWords(node * TreeNode, output string, depth int) {
if node != nil {
// Visit left subtree
this.printWords(node.left, output, depth)
if node.terminate == true {
// Display word
fmt.Print(" ", (output + string(node.data)), "\n")
}
// Visit equal (middle) subtree
this.printWords(node.equal, output + string(node.data), depth + 1)
// Visit left subtree
this.printWords(node.right, output, depth)
}
}
// Function to insert a new word in a Ternary Search Tree
func(this TernarySearchTree) insert(rootNode * TreeNode, word string, position int) * TreeNode {
var node * TreeNode = rootNode
if rootNode == nil {
node = getTreeNode(word[position])
}
if word[position] < node.data {
node.left = this.insert(node.left, word, position)
} else if word[position] > node.data {
node.right = this.insert(node.right, word, position)
} else {
if (position + 1) < len(word) {
node.equal = this.insert(node.equal, word, position + 1)
} else {
node.terminate = true
}
}
return node
}
// Handles the request of add new node
func(this *TernarySearchTree) addNode(word string) {
if len(word) == 0 {
return
}
this.root = this.insert(this.root, word, 0)
}
func(this TernarySearchTree) searchElement(node * TreeNode, word string, position int) bool {
if node == nil {
return false
} else if word[position] < node.data {
return this.searchElement(node.left, word, position)
} else if word[position] > node.data {
return this.searchElement(node.right, word, position)
} else {
if position + 1 < len(word) {
// When word not empty
return this.searchElement(node.equal, word, position + 1)
} else {
// returns status to terminate word
return node.terminate
}
}
}
// Handles the request of search word
func(this TernarySearchTree) searchTreeNode(word string) {
fmt.Print("\n Given : [", word, "] \n")
if len(word) > 0 && this.searchElement(this.root, word, 0) == true {
fmt.Print(" Found\n")
} else {
}
}
func(this TernarySearchTree) countSiblings(node * TreeNode) int {
var count int = 0
if node.left != nil {
count++
}
if node.right != nil {
count++
}
if node.equal != nil {
count++
}
return count
}
func(this TernarySearchTree) deleteWord(node * TreeNode, word string, position int) * TreeNode {
if node == nil {
// When delete node not exist
return nil
}
var child int = this.countSiblings(node)
if word[position] < node.data {
node.left = this.deleteWord(node.left, word, position)
} else if word[position] > node.data {
node.right = this.deleteWord(node.right, word, position)
} else {
if (position + 1) < len(word) {
// When word not empty
node.equal = this.deleteWord(node.equal, word, position + 1)
} else if node.terminate == true {
if child > 0 {
// In case child node exist of deleted word
node.terminate = false
} else {
return nil
}
}
}
if child != this.countSiblings(node) && child == 1 && node.terminate == false {
// When need to remove node
return nil
}
return node
}
func main() {
var tree * TernarySearchTree = getTernarySearchTree()
fmt.Print(" Ternary search tree\n")
tree.printWords(tree.root, "", 0)
// Case A
var word string = "fee"
fmt.Print("\n Delete word : ", word, " \n")
tree.root = tree.deleteWord(tree.root, word, 0)
fmt.Print(" Ternary search tree\n")
tree.printWords(tree.root, "", 0)
// Case B
word = "code"
fmt.Print("\n Delete word : ", word, " \n")
tree.root = tree.deleteWord(tree.root, word, 0)
fmt.Print(" Ternary search tree\n")
tree.printWords(tree.root, "", 0)
// Case C
word = "milks"
fmt.Print("\n Delete word : ", word, " \n")
tree.root = tree.deleteWord(tree.root, word, 0)
fmt.Print(" Ternary search tree\n")
tree.printWords(tree.root, "", 0)
// Case D
word = "feel"
fmt.Print("\n Delete word : ", word, " \n")
tree.root = tree.deleteWord(tree.root, word, 0)
fmt.Print(" Ternary search tree\n")
tree.printWords(tree.root, "", 0)
}``````

#### input

`````` Ternary search tree
co
code
fee
feel
milk
run

Delete word : fee
Ternary search tree
co
code
feel
milk
run

Delete word : code
Ternary search tree
co
feel
milk
run

Delete word : milks
Ternary search tree
co
feel
milk
run

Delete word : feel
Ternary search tree
co
milk
run``````

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