Trie Bottom-Up Traversal

Here given code implementation process.

/*
Java program
Trie Bottom-Up Traversal
*/
#include <iostream>

#include <string.h>

#define ALPHABETS 26

using namespace std;
class Node {
  public:
  bool end;
  Node *children[ALPHABETS];
  Node() {
    this->end = false;
    for (int i = 0; i < ALPHABETS; ++i) {
      this->children[i] = NULL;
    }
  }
};
class Trie {
  public:
    Node *root;
  Trie() {
    this->root = new Node();
  }
  void insert(string text) {
    int length = text.size();
    int index = 0;
    Node *head = this->root;
    int level = 0;
    while (level < length) {
      index = text[level] - 'a';
      if (head->children[index] == NULL) {
        head->children[index] = new Node();
      }
      head = head->children[index];
      level++;
    }
    if (head != NULL) {
      head->end = true;
    }
  }
  void display(Node *head) {
    if (head != NULL) {
      int i = 0;
      while (i < ALPHABETS) {
        if (head->children[i] != NULL) {
          this->display(head->children[i]);
          cout <<"  "<< (char)(i + 97);
        }
        i++;
      }
    }
  }
};
int main() {
  Trie obj;
  /*
       root
       /   \
      c     w   
      |     |
      o     a  
      | \   |
      o  w  r
    / | \ 
    d k  l
    | |
    e y
  */
  obj.insert("war");
  obj.insert("cooky");
  obj.insert("cool");
  obj.insert("code");
  obj.insert("cow");
  obj.display(obj.root);
}

Output

 e  d  y  k  l  o  w  o  c  r  a  w
/*
Java program
Trie Bottom-Up Traversal
*/
class Node {
  //Indicates end of string
  public boolean end;

  public Node[] children;

  public Node(int size) {
    end = false;
    children = new Node[size];
  }
}
public class Trie 
{ 
  public int ALPHABETS = 26;

  public Node root;

  public Trie() {
    root = new Node(ALPHABETS);
  }

  public void insert(String text) {
    //First get the length of text
    int length = text.length();

    //This variable are used to task find the index location of character
    int index = 0;

    //Get the root node
    Node head = root;

    for (int level = 0; level < length; level++) {
      //Get the index
      index = text.charAt(level) - 'a';

      if (head.children[index] == null) {
        //When need to add new Node
        head.children[index] = new Node(ALPHABETS);
      }

      head = head.children[index];
    }
    if (head != null) {
      //Indicates end of string
      head.end = true;
    }
  }
  public void display(Node root)
  {

    if(root!=null)
    {

      for (int i = 0; i < ALPHABETS ; i++ ) 
      {
        if(root.children[i] != null)
        {
          display(root.children[i]);

          System.out.print(" "+(char)(i+97));
        }    
      }
    }
  }

  public static void main(String[] args) 
  {
    //Make object
    Trie obj = new Trie();
    obj.insert("war");
    obj.insert("cooky");
    obj.insert("cool");
    obj.insert("code");
    obj.insert("cow");


  /*
       root
       /   \
      c     w   
      |     |
      o     a  
      | \   |
      o  w  r
    / | \ 
    d k  l
    | |
    e y
  */

    obj.display(obj.root);
  }
}

Output

 e d y k l o w o c r a w
/*
C# program
Trie Bottom-Up Traversal
*/
using System;
public class Node {
	//Indicates end of string
	public Boolean end;

	public Node[] children;

	public Node(int size) {
		end = false;
		children = new Node[size];
	}
}
public class Trie 
{ 
	public int ALPHABETS = 26;

	public Node root;

	public Trie() {
		root = new Node(ALPHABETS);
	}

	public void insert(String text) {
		//first get the.Length of text
		int size = text.Length;

		//This variable are used to task find the index location of character
		int index = 0;

		//get the root node
		Node head = root;

		for (int level = 0; level < size; level++) {
			//Get the index
			index = text[level] - 'a';

			if (head.children[index] == null) {
				//When need to add new Node
				head.children[index] = new Node(ALPHABETS);
			}

			head = head.children[index];
		}
		if (head != null) {
			//indicates end of string
			head.end = true;
		}
	}
	public void display(Node root)
	{

		if(root!=null)
		{

			for (int i = 0; i < ALPHABETS ; i++ ) 
			{
				if(root.children[i] != null)
				{
					display(root.children[i]);

					Console.Write(" "+(char)(i+97));
				}    
			}
		}
	}

	public static void Main(String[] args) 
	{
		//Make object
		Trie obj = new Trie();
		obj.insert("war");
		obj.insert("cooky");
		obj.insert("cool");
		obj.insert("code");
		obj.insert("cow");


		/*
       root
       /   \
      c     w   
      |     |
      o     a  
      | \   |
      o  w  r
    / | \ 
    d k  l
    | |
    e y
    */

		obj.display(obj.root);
	}
}

Output

 e d y k l o w o c r a w
#Python3 Program
#Trie Bottom-Up Traversal
class Node :

  def __init__(self, size) :
    self.end = False
    self.children = [None]*size
  

class Trie :

  def __init__(self) :
    self.ALPHABETS = 26
    self.root = Node(self.ALPHABETS)
  
  def insert(self, text) :
    length = len(text)
    index = 0
    head = self.root
    level = 0
    while (level < length) :
      index = ord(text[level]) - ord('a')
      if (head.children[index] == None) :
        head.children[index] = Node(self.ALPHABETS)
      
      head = head.children[index]
      level += 1
    
    if (head != None) :
      head.end = True
    
  
  def display(self, head) :
    if (head != None) :
      i = 0
      while (i < self.ALPHABETS) :
        if (head.children[i] != None) :
          self.display(head.children[i])
          print(chr(i + 97),end=" ")
        
        i += 1
      
    
  
def main() :
  obj = Trie()

  #       root
  #       /   \
  #      c     w
  #      |     |
  #      o     a
  #      | \   |
  #      o  w  r
  #    / | \
  #    d k  l
  #    | |
  #    e y

  obj.insert("war")
  obj.insert("cooky")
  obj.insert("cool")
  obj.insert("code")
  obj.insert("cow")
  obj.display(obj.root)
  

if __name__ == "__main__":
  main()

Output

e d y k l o w o c r a w
# Java program
# Trie Bottom-Up Traversal

class Node
	attr_reader :end, :children
	attr_accessor :end, :children
	def initialize(size) 
		@end = false
		@children = Array.new(size){nil}
	end
end

class Trie
	attr_reader :ALPHABETS, :root
	attr_accessor :ALPHABETS, :root
	def initialize() 
		@ALPHABETS = 26
		@root = Node.new(@ALPHABETS)
	end
	def insert(text) 
		size = text.length
		location = 0
		head = @root
		level = 0
		while (level < size) 
			location = text[level].ord - 'a'.ord
			if (head.children[location] == nil) 
				head.children[location] = Node.new(@ALPHABETS)
			end
			head = head.children[location]
			level += 1
		end
		if (head != nil) 
			head.end = true
		end
	end
	def display(head) 
		if (head != nil) 
			i = 0
			while (i < @ALPHABETS) 
				if (head.children[i] != nil) 
					self.display(head.children[i])
					print(" " , (i + 97).chr)
				end
				i += 1
			end
		end
	end
end

def main() 
	obj = Trie.new()

	#
	#       root
	#       /   \
	#      c     w
	#      |     |
	#      o     a
	#      | \   |
	#      o  w  r
	#    / | \
	#    d k  l
	#    | |
	#    e y
	#    
	obj.insert("war")
	obj.insert("cooky")
	obj.insert("cool")
	obj.insert("code")
	obj.insert("cow")
	obj.display(obj.root)
end
main()

Output

 e d y k l o w o c r a w
<?php
/*
  Php Program
  Trie Bottom-Up Traversal
*/
class Node {
  public $end;
  public $children = [];

  function __construct($size) {
    $this->end = false;
    $this->children = array_fill(0, $size, null);
  }
}
class Trie {
  private $ALPHABETS;
  public $root;

  function __construct() {
    $this->ALPHABETS = 26;
    $this->root = new Node($this->ALPHABETS);
  }

  public  function insert($text) {
    $size = strlen($text);
    $index = 0;
    $head = $this->root;
    $level = 0;
    while ($level < $size) {
      $index =  ord($text[$level]) - ord('a');
      if ($head->children[$index] == null) {
        $head->children[$index] = new Node($this->ALPHABETS);
      }
      $head = $head->children[$index];
      $level++;
    }
    if ($head != null) {
      $head->end = true;
    }
  }
  public  function display($head) {
    if ($head != null) {
      $i = 0;
      while ($i < $this->ALPHABETS) {
        if ($head->children[$i] != null) {
          $this->display($head->children[$i]);
          echo (" ". chr($i + 97));
        }
        $i++;
      }
    }
  }
}

function main() {
  $obj = new Trie();
  /*
        root
       /   \
      c     w
      |     |
      o     a
      | \   |
      o  w  r
    / | \ 
    d k  l
    | |
    e y
  */
  $obj->insert("war");
  $obj->insert("cooky");
  $obj->insert("cool");
  $obj->insert("code");
  $obj->insert("cow");
  $obj->display($obj->root);
}
main();

Output

 e d y k l o w o c r a w
/*
  Node Js Program
  Trie Bottom-Up Traversal
*/
class Node {
	
	constructor(size) {
		this.end = false;
		this.children = new Array(size).fill(null);
	}
}
class Trie {
	
	constructor() {
		this.ALPHABETS = 26;
		this.root = new Node(this.ALPHABETS);
	}
	insert(text) {
		var size = text.length;
		var index = 0;
		var head = this.root;
		var level = 0;
		while (level < size) {
			index = text.charCodeAt(level) - 'a'.charCodeAt(0);
			if (head.children[index] == null) {
				head.children[index] = new Node(this.ALPHABETS);
			}
			head = head.children[index];
			level++;
		}
		if (head != null) {
			head.end = true;
		}
	}
	display(head) {
		if (head != null) {
			var i = 0;
			while (i < this.ALPHABETS) {
				if (head.children[i] != null) {
					this.display(head.children[i]);
					process.stdout.write(" " + String.fromCharCode(i + 97));
				}
				i++;
			}
		}
	}



}
function main() {
	var obj = new Trie();
	/*
	        root
	       /   \
	      c     w
	      |     |
	      o     a
	      | \   |
	      o  w  r
	    / | \ 
	    d k  l
	    | |
	    e y
	 */
	obj.insert("war");
	obj.insert("cooky");
	obj.insert("cool");
	obj.insert("code");
	obj.insert("cow");
	obj.display(obj.root);
}
main();

Output

 e d y k l o w o c r a w


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