Count words that appear exactly two times in an array of words

Here given code implementation process.

import java.util.HashMap;
/*
    Java program for
    Count words that appear exactly two times in an array of words
*/
public class Occurrence
{
	public void findTwoOccurrence(String[] words, int n)
	{
		int result = 0;
		HashMap < String, Integer > record = 
          new HashMap < String, Integer > ();
		// Count frequency of array elements
		for (int i = 0; i < n; ++i)
		{
			if (record.containsKey(words[i]))
			{	// Increase the frequency
				record.put(words[i], record.get(words[i]) + 1);
			}
			else
			{
              	// Add new element
				record.put(words[i], 1);
			}
		}
		for (String v: record.keySet())
		{
			if (record.get(v) == 2)
			{
              	// When elements are exactly two times
				result++;
			}
		}
		// When result not exist
		System.out.println(" Result : " + result);
	}
	public static void main(String[] args)
	{
		Occurrence task = new Occurrence();
		String[] words = {
			"ip" , "error" , "cool" , "code" , 
              "set" , "game" , "set" , "cool" , 
          	"error" , "cool"
		};
		int n = words.length;
		/*
		    word = ["ip","error","cool" ,
                    "code","set","game" ,
                    "set","cool","error" ,
                    "cool]
		    --------------------------
		    [set,error] appear exactly 2 times
		*/
		task.findTwoOccurrence(words, n);
	}
}

Output

 Result : 2
// Include header file
#include <iostream>
#include <unordered_map>

using namespace std;
/*
    C++ program for
    Count words that appear exactly two times in an array of words
*/
class Occurrence
{
	public: void findTwoOccurrence(string words[], int n)
	{
		int result = 0;
		unordered_map < string, int > record;
		// Count frequency of array elements
		for (int i = 0; i < n; ++i)
		{
			if (record.find(words[i]) != record.end())
			{
				// Increase the frequency
				record[words[i]] = record[words[i]] + 1;
			}
			else
			{
				// Add new element
				record[words[i]] = 1;
			}
		}
		for (auto &v: record)
		{
			if (record[v.first] == 2)
			{
				// When elements are exactly two times
				result++;
			}
		}
		// When result not exist
		cout << " Result : " << result << endl;
	}
};
int main()
{
	Occurrence *task = new Occurrence();
	string words[] = {
		"ip" , "error" , "cool" , "code" , 
      	"set" , "game" , "set" , "cool" , 
      	"error" , "cool"
	};
	int n = sizeof(words) / sizeof(words[0]);
	/*
	    word = ["ip","error","cool",
        "code","set","game"  ,
        "set","cool","error"  , 
        "cool]
	    --------------------------
	    [set,error] appear exactly 2 times
	*/
	task->findTwoOccurrence(words, n);
	return 0;
}

Output

 Result : 2
// Include namespace system
using System;
using System.Collections.Generic;
/*
    Csharp program for
    Count words that appear exactly two times in an array of words
*/
public class Occurrence
{
	public void findTwoOccurrence(String[] words, int n)
	{
		int result = 0;
		Dictionary < string, int > record = 
          new Dictionary < string, int > ();
		// Count frequency of array elements
		for (int i = 0; i < n; ++i)
		{
			if (record.ContainsKey(words[i]))
			{
				// Increase the frequency
				record[words[i]] = record[words[i]] + 1;
			}
			else
			{
				// Add new element
				record.Add(words[i], 1);
			}
		}
		foreach(KeyValuePair < String, int > v in record)
		{
			if (v.Value == 2)
			{
				// When elements are exactly two times
				result++;
			}
		}
		// When result not exist
		Console.WriteLine(" Result : " + result);
	}
	public static void Main(String[] args)
	{
		Occurrence task = new Occurrence();
		String[] words = {
			"ip" , "error" , "cool" , "code" , 
          "set" , "game" , "set" , "cool" , "error" , "cool"
		};
		int n = words.Length;
		/*
		    word = ["ip","error","cool", 
            "code","set","game" ,
            "set","cool","error", "cool]
		    --------------------------
		    [set,error] appear exactly 2 times
		*/
		task.findTwoOccurrence(words, n);
	}
}

Output

 Result : 2
package main
import "fmt"
/*
    Go program for
    Count words that appear exactly two times 
    in an array of words
*/

func findTwoOccurrence(words[] string, n int) {
	var result int = 0
	var record = make(map[string] int)
	// Count frequency of array elements
	for i := 0 ; i < n ; i++ {
		if _, found := record[words[i]] ; found {
			// Increase the frequency
			record[words[i]] = record[words[i]] + 1
		} else {
			// Add new element
			record[words[i]] = 1
		}
	}
	for _, v := range record {
		if v == 2 {
			// When elements are exactly two times
			result++
		}
	}
	// When result not exist
	fmt.Println(" Result : ", result)
}
func main() {

	var words = [] string {"ip","error","cool","code","set",
			"game","set","cool","error","cool"}
	var n int = len(words)
	/*
	    word = ["ip","error","cool" ,
	         "code","set","game" ,
	         "set","cool","error" ,
	         "cool]
	    --------------------------
	    [set,error] appear exactly 2 times
	*/
	findTwoOccurrence(words, n)
}

Output

 Result : 2
<?php
/*
    Php program for
    Count words that appear exactly two times in an array of words
*/
class Occurrence
{
	public	function findTwoOccurrence($words, $n)
	{
		$result = 0;
		$record = array();
		// Count frequency of array elements
		for ($i = 0; $i < $n; ++$i)
		{
			if (array_key_exists($words[$i], $record))
			{
				// Increase the frequency
				$record[$words[$i]] = $record[$words[$i]] + 1;
			}
			else
			{
				// Add new element
				$record[$words[$i]] = 1;
			}
		}
		foreach($record as $key => $value)
		{
			if ($value == 2)
			{
				// When elements are exactly two times
				$result++;
			}
		}
		// When result not exist
		echo(" Result : ".$result.
			"\n");
	}
}

function main()
{
	$task = new Occurrence();
	$words = array("ip", "error", "cool", "code", "set", 
                   "game", "set", "cool", "error", "cool");
	$n = count($words);
	/*
	    word = ["ip","error","cool" ,
	         "code","set","game" ,
	         "set","cool","error" ,
	         "cool]
	    --------------------------
	    [set,error] appear exactly 2 times
	*/
	$task->findTwoOccurrence($words, $n);
}
main();

Output

 Result : 2
/*
    Node JS program for
    Count words that appear exactly two times in an array of words
*/
class Occurrence
{
	findTwoOccurrence(words, n)
	{
		var result = 0;
		var record = new Map();
		// Count frequency of array elements
		for (var i = 0; i < n; ++i)
		{
			if (record.has(words[i]))
			{
				// Increase the frequency
				record.set(words[i], record.get(words[i]) + 1);
			}
			else
			{
				// Add new element
				record.set(words[i], 1);
			}
		}
		for (let [key, value] of record)
		{
			if (value == 2)
			{
				// When elements are exactly two times
				result++;
			}
		}
		// When result not exist
		console.log(" Result : " + result);
	}
}

function main()
{
	var task = new Occurrence();
	var words = ["ip", "error", "cool", "code", 
                 "set", "game", "set", "cool", "error", "cool"];
	var n = words.length;
	/*
	    word = ["ip","error","cool" ,
	         "code","set","game" ,
	         "set","cool","error" ,
	         "cool]
	    --------------------------
	    [set,error] appear exactly 2 times
	*/
	task.findTwoOccurrence(words, n);
}
main();

Output

 Result : 2
#    Python 3 program for
#    Count words that appear exactly two times in an array of words
class Occurrence :
	def findTwoOccurrence(self, words, n) :
		result = 0
		record = dict()
		i = 0
		#  Count frequency of list elements
		while (i < n) :
			if ((words[i] in record.keys())) :
				#  Increase the frequency
				record[words[i]] = record.get(words[i]) + 1
			else :
				#  Add new element
				record[words[i]] = 1
			
			i += 1
		
		for key, value in record.items() :
			if (value == 2) :
				#  When elements are exactly two times
				result += 1
			
		
		#  When result not exist
		print(" Result : ", result)
	

def main() :
	task = Occurrence()
	words = ["ip", "error", "cool", "code", 
             "set", "game", "set", "cool", "error", "cool"]
	n = len(words)
	#    word = ["ip","error","cool" ,
	#         "code","set","game" ,
	#         "set","cool","error" ,
	#         "cool]
	#    --------------------------
	#    [set,error] appear exactly 2 times
	task.findTwoOccurrence(words, n)

if __name__ == "__main__": main()

Output

 Result :  2
#    Ruby program for
#    Count words that appear exactly two times in an array of words
class Occurrence 
	def findTwoOccurrence(words, n) 
		result = 0
		record = Hash.new()
		i = 0
		#  Count frequency of array elements
		while (i < n) 
			if (record.key?(words[i])) 
				#  Increase the frequency
				record[words[i]] = record[words[i]] + 1
			else
 
				#  Add new element
				record[words[i]] = 1
			end

			i += 1
		end

		record.each { | key, value |
			if (value == 2) 
				#  When elements are exactly two times
				result += 1
			end

		}
		#  When result not exist
		print(" Result : ", result, "\n")
	end

end

def main() 
	task = Occurrence.new()
	words = ["ip", "error", "cool", "code", 
             "set", "game", "set", "cool", "error", "cool"]
	n = words.length
	#    word = ["ip","error","cool" ,
	#         "code","set","game" ,
	#         "set","cool","error" ,
	#         "cool]
	#    --------------------------
	#    [set,error] appear exactly 2 times
	task.findTwoOccurrence(words, n)
end

main()

Output

 Result : 2
import scala.collection.mutable._;
/*
    Scala program for
    Count words that appear exactly two times in an array of words
*/
class Occurrence()
{
	def findTwoOccurrence(words: Array[String], n: Int): Unit = {
		var result: Int = 0;
		var record: HashMap[String, Int] = 
          new HashMap[String, Int]();
		var i: Int = 0;
		// Count frequency of array elements
		while (i < n)
		{
			if (record.contains(words(i)))
			{
				// Increase the frequency
				record.addOne(words(i), record.get(words(i)).get + 1);
			}
			else
			{
				// Add new element
				record.addOne(words(i), 1);
			}
			i += 1;
		}
		for ((key, value) <- record)
		{
			if (value == 2)
			{
				// When elements are exactly two times
				result += 1;
			}
		}
		// When result not exist
		println(" Result : " + result);
	}
}
object Main
{
	def main(args: Array[String]): Unit = {
		var task: Occurrence = new Occurrence();
		var words: Array[String] = Array(
          "ip", "error", "cool", "code", "set", 
          "game", "set", "cool", "error", "cool");
		var n: Int = words.length;
		/*
		    word = ["ip","error","cool" ,
		         "code","set","game" ,
		         "set","cool","error" ,
		         "cool]
		    --------------------------
		    [set,error] appear exactly 2 times
		*/
		task.findTwoOccurrence(words, n);
	}
}

Output

 Result : 2
import Foundation;
/*
    Swift 4 program for
    Count words that appear exactly two times in an array of words
*/
class Occurrence
{
	func findTwoOccurrence(_ words: [String], _ n: Int)
	{
		var result: Int = 0;
		var record = [String : Int]();
		var i: Int = 0;
		// Count frequency of array elements
		while (i < n)
		{
			if (record.keys.contains(words[i]))
			{
				// Increase the frequency
				record[words[i]] = record[words[i]]! + 1;
			}
			else
			{
				// Add new element
				record[words[i]] = 1;
			}
			i += 1;
		}
		for (_, value) in record
		{
			if (value == 2)
			{
				// When elements are exactly two times
				result += 1;
			}
		}
		// When result not exist
		print(" Result : ", result);
	}
}
func main()
{
	let task: Occurrence = Occurrence();
	let words: [String] = ["ip", "error", "cool", 
                           "code", "set", "game", 
                           "set", "cool", "error", "cool"];
	let n: Int = words.count;
	/*
	    word = ["ip","error","cool" ,
	         "code","set","game" ,
	         "set","cool","error" ,
	         "cool]
	    --------------------------
	    [set,error] appear exactly 2 times
	*/
	task.findTwoOccurrence(words, n);
}
main();

Output

 Result :  2
/*
    Kotlin program for
    Count words that appear exactly two times in an array of words
*/
class Occurrence
{
	fun findTwoOccurrence(words: Array < String > , n: Int): Unit
	{
		var result: Int = 0;
		val record: HashMap < String, Int > = 
          HashMap < String, Int > ();
		var i: Int = 0;
		// Count frequency of array elements
		while (i < n)
		{
			if (record.containsKey(words[i]))
			{
				// Increase the frequency
				record.put(words[i], record.getValue(words[i]) + 1);
			}
			else
			{
				// Add new element
				record.put(words[i], 1);
			}
			i += 1;
		}
		for ((_, value) in record)
		{
			if (value == 2)
			{
				// When elements are exactly two times
				result += 1;
			}
		}
		// When result not exist
		println(" Result : " + result);
	}
}
fun main(args: Array < String > ): Unit
{
	val task: Occurrence = Occurrence();
	val words: Array < String > = arrayOf(
      "ip", "error", "cool", "code", "set", 
      "game", "set", "cool", "error", "cool");
	val n: Int = words.count();
	/*
	    word = ["ip","error","cool"  ,
        	"code","set","game"  ,
        	"set","cool","error"  , 
        	"cool]
	    --------------------------
	    [set,error] appear exactly 2 times
	*/
	task.findTwoOccurrence(words, n);
}

Output

 Result : 2


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