Group the array elements by occurrence sequence

Here given code implementation process.

/*
    Java program
    Group the array elements by occurrence sequence
*/
import java.util.HashMap; 
public class Grouping
{
	// Function which is display array elements
	public void display(int[] arr, int n)
	{
		for (int i = 0; i < n; ++i)
		{
			System.out.print("   " + arr[i]);
		}
		System.out.print("\n");
	}
	// Combine group element
	public void combining(int []arr, int n)
	{
		System.out.print("\n Given Array \n");
		// Display given array
		display(arr, n);
		HashMap < Integer, Integer > map = new HashMap < Integer, Integer > ();
		int[] result = new int[n];
		// Loop controlling variable
		int i = 0;
		int j = 0;
		int index = 0;
		// iterate the loop through by size
		for (i = 0; i < n; ++i)
		{
			if (map.containsKey(arr[i]))
			{
				// When key exists then update value
				map.put(arr[i], map.get(arr[i]) + 1);
			}
			else
			{
				// Adding a new element
				map.put(arr[i], 1);
			}
		}
		// iterate the loop through by size
		for (i = 0; i < n; ++i)
		{
			if (map.containsKey(arr[i]))
			{
				// Get repeated element into resultant array
				for (j = 0; j < map.get(arr[i]); ++j)
				{
					// Put element
					result[index] = arr[i];
					// next index location
					index++;
				}
				// Remove current element
				map.remove(arr[i]);
			}
		}
		// Display calculated result
		System.out.print(" Resultant Array \n");
		display(result, n);
	}
	public static void main(String[] args)
	{
		Grouping task = new Grouping();
		// Define array of integer elements
		int num[] = {
			2 , 8 , 2 , 4 , 7 , 2 , 5 , 4 , 8 , 1
		};
		// Get the number of element
		int n = num.length;
		task.combining(num, n);
	}
}

Output

 Given Array
   2   8   2   4   7   2   5   4   8   1
 Resultant Array
   2   2   2   8   8   4   4   7   5   1
// Include header file
#include <iostream>
#include <unordered_map>
using namespace std;

class Grouping
{
	public:
		// Function which is display array elements
		void display(int arr[], int n)
		{
			for (int i = 0; i < n; ++i)
			{
				cout << "   " << arr[i];
			}
			cout << "\n";
		}
	// Combine group element
	void combining(int arr[], int n)
	{
		cout << "\n Given Array \n";
		// Display given array
		this->display(arr, n);
		unordered_map < int, int > map;
		int result[n];
		// Loop controlling variable
		int i = 0;
		int j = 0;
		int index = 0;
		// iterate the loop through by size
		for (i = 0; i < n; ++i)
		{
			if (map.find(arr[i]) != map.end())
			{
				map[arr[i]] = map[arr[i]] + 1;
			}
			else
			{
				map[arr[i]] = 1;
			}
		}
		// iterate the loop through by size
		for (i = 0; i < n; ++i)
		{
			if (map.find(arr[i]) != map.end())
			{
				// Get repeated element into resultant array
				for (j = 0; j < map[arr[i]]; ++j)
				{
					// next index location
					// Put element
					result[index] = arr[i];
					index++;
				}
				map.erase(arr[i]);
			}
		}
		// Display calculated result
		cout << " Resultant Array \n";
		this->display(result, n);
	}
};
int main()
{
	Grouping task = Grouping();
	// Define array of integer elements
	int num[] = {
		2 , 8 , 2 , 4 , 7 , 2 , 5 , 4 , 8 , 1
	};
	// Get the number of element
	int n = sizeof(num) / sizeof(num[0]);
	task.combining(num, n);
	return 0;
}

Output

 Given Array
   2   8   2   4   7   2   5   4   8   1
 Resultant Array
   2   2   2   8   8   4   4   7   5   1
// Include namespace system
using System;
using System.Collections.Generic;
public class Grouping
{
	// Function which is display array elements
	public void display(int[] arr, int n)
	{
		for (int i = 0; i < n; ++i)
		{
			Console.Write("   " + arr[i]);
		}
		Console.Write("\n");
	}
	// Combine group element
	public void combining(int[] arr, int n)
	{
		Console.Write("\n Given Array \n");
		// Display given array
		display(arr, n);
		Dictionary < int, int > map = new Dictionary < int, int > ();
		int[] result = new int[n];
		// Loop controlling variable
		int i = 0;
		int j = 0;
		int index = 0;
		// iterate the loop through by size
		for (i = 0; i < n; ++i)
		{
			if (map.ContainsKey(arr[i]))
			{
				map[arr[i]] = map[arr[i]] + 1;
			}
			else
			{
				map.Add(arr[i], 1);
			}
		}
		// iterate the loop through by size
		for (i = 0; i < n; ++i)
		{
			if (map.ContainsKey(arr[i]))
			{
				// Get repeated element into resultant array
				for (j = 0; j < map[arr[i]]; ++j)
				{
					// next index location
					// Put element
					result[index] = arr[i];
					index++;
				}
				map.Remove(arr[i]);
			}
		}
		// Display calculated result
		Console.Write(" Resultant Array \n");
		display(result, n);
	}
	public static void Main(String[] args)
	{
		Grouping task = new Grouping();
		// Define array of integer elements
		int[] num = {
			2 , 8 , 2 , 4 , 7 , 2 , 5 , 4 , 8 , 1
		};
		// Get the number of element
		int n = num.Length;
		task.combining(num, n);
	}
}

Output

 Given Array
   2   8   2   4   7   2   5   4   8   1
 Resultant Array
   2   2   2   8   8   4   4   7   5   1
<?php
class Grouping
{
	// Function which is display array elements
	public	function display( & $arr, $n)
	{
		for ($i = 0; $i < $n; ++$i)
		{
			echo "   ". $arr[$i];
		}
		echo "\n";
	}
	// Combine group element
	public	function combining( & $arr, $n)
	{
		echo "\n Given Array \n";
		// Display given array
		$this->display($arr, $n); 
      	$map = array();
		$result = array_fill(0, $n, 0);
		// Loop controlling variable
		$i = 0;
		$j = 0;
		$index = 0;
		// iterate the loop through by size
		for ($i = 0; $i < $n; ++$i)
		{
			if (array_key_exists($arr[$i], $map))
			{
				$map[$arr[$i]] = $map[$arr[$i]] + 1;
			}
			else
			{
				$map[$arr[$i]] = 1;
			}
		}
		// iterate the loop through by size
		for ($i = 0; $i < $n; ++$i)
		{
			if (array_key_exists($arr[$i], $map))
			{
				// Get repeated element into resultant array
				for ($j = 0; $j < $map[$arr[$i]]; ++$j)
				{
					// next index location
					// Put element
					$result[$index] = $arr[$i];
					$index++;
				}
				unset($map[$arr[$i]]);
			}
		}
		// Display calculated result
		echo " Resultant Array \n";
		$this->display($result, $n);
	}
}

function main()
{
	$task = new Grouping();
	// Define array of integer elements
	$num = array(2, 8, 2, 4, 7, 2, 5, 4, 8, 1);
	// Get the number of element
	$n = count($num);
	$task->combining($num, $n);
}
main();

Output

 Given Array
   2   8   2   4   7   2   5   4   8   1
 Resultant Array
   2   2   2   8   8   4   4   7   5   1
/*
    Node Js program
    Group the array elements by occurrence sequence
*/
class Grouping
{
	// Function which is display array elements
	display(arr, n)
	{
		for (var i = 0; i < n; ++i)
		{
			process.stdout.write("   " + arr[i]);
		}
		process.stdout.write("\n");
	}
	// Combine group element
	combining(arr, n)
	{
		process.stdout.write("\n Given Array \n");
		// Display given array
		this.display(arr, n);
		var map = new Map();
		var result = Array(n).fill(0);
		// Loop controlling variable
		var i = 0;
		var j = 0;
		var index = 0;
		// iterate the loop through by size
		for (i = 0; i < n; ++i)
		{
			if (map.has(arr[i]))
			{
				map.set(arr[i], map.get(arr[i]) + 1);
			}
			else
			{
				map.set(arr[i], 1);
			}
		}
		// iterate the loop through by size
		for (i = 0; i < n; ++i)
		{
			if (map.has(arr[i]))
			{
				// Get repeated element into resultant array
				for (j = 0; j < map.get(arr[i]); ++j)
				{
					// next index location
					// Put element
					result[index] = arr[i];
					index++;
				}
				map.delete(arr[i]);
			}
		}
		// Display calculated result
		process.stdout.write(" Resultant Array \n");
		this.display(result, n);
	}
}

function main()
{
	var task = new Grouping();
	// Define array of integer elements
	var num = [2, 8, 2, 4, 7, 2, 5, 4, 8, 1];
	// Get the number of element
	var n = num.length;
	task.combining(num, n);
}
main();

Output

 Given Array
   2   8   2   4   7   2   5   4   8   1
 Resultant Array
   2   2   2   8   8   4   4   7   5   1
#  Python 3 program
#  Group the array elements by occurrence sequence

class Grouping :
	#  Function which is display list elements
	def display(self, arr, n) :
		i = 0
		while (i < n) :
			print("  ", arr[i], end = "")
			i += 1
		
		print(end = "\n")
	
	#  Combine group element
	def combining(self, arr, n) :
		print("\n Given Array ")
		#  Display given list
		self.display(arr, n) 
		map = dict()
		result = [0] * (n)
		#  Loop controlling variable
		i = 0
		j = 0
		index = 0
		#  iterate the loop through by size
		while (i < n) :
			if (arr[i] in map.keys()) :
				map[arr[i]] = map.get(arr[i]) + 1
			else :
				map[arr[i]] = 1
			
			i += 1
		
		#  iterate the loop through by size
		i = 0
		while (i < n) :
			if (arr[i] in map.keys()) :
				#  Get repeated element into resultant list
				while (j < map.get(arr[i])) :
					#  next index location
					#  Put element
					result[index] = arr[i]
					index += 1
					j += 1
				
				del map[arr[i]]
				j = 0
			
			i += 1
		
		#  Display calculated result
		print(" Resultant Array ")
		self.display(result, n)
	

def main() :
	task = Grouping()
	#  Define list of integer elements
	num = [2, 8, 2, 4, 7, 2, 5, 4, 8, 1]
	#  Get the number of element
	n = len(num)
	task.combining(num, n)

if __name__ == "__main__": main()

Output

 Given Array
   2   8   2   4   7   2   5   4   8   1
 Resultant Array
   2   2   2   8   8   4   4   7   5   1
#  Ruby program
#  Group the array elements by occurrence sequence

class Grouping 
	#  Function which is display array elements
	def display(arr, n) 
		i = 0
		while (i < n) 
			print("   ", arr[i])
			i += 1
		end

		print("\n")
	end

	#  Combine group element
	def combining(arr, n) 
		print("\n Given Array \n")
		#  Display given array
		self.display(arr, n)
		map = Hash.new
		result = Array.new(n) {0}
		#  Loop controlling variable
		i = 0
		j = 0
		index = 0
		#  iterate the loop through by size
		while (i < n) 
			if (map.key?(arr[i])) 
				map[arr[i]] = map[arr[i]] + 1
			else 
				map[arr[i]] = 1
			end

			i += 1
		end

		#  iterate the loop through by size
		i = 0
		while (i < n) 
			if (map.key?(arr[i])) 
				#  Get repeated element into resultant array
				while (j < map[arr[i]]) 
					#  next index location
					#  Put element
					result[index] = arr[i]
					index += 1
					j += 1
				end

				map.delete(arr[i])
				j = 0
			end

			i += 1
		end

		#  Display calculated result
		print(" Resultant Array \n")
		self.display(result, n)
	end

end

def main() 
	task = Grouping.new()
	#  Define array of integer elements
	num = [2, 8, 2, 4, 7, 2, 5, 4, 8, 1]
	#  Get the number of element
	n = num.length
	task.combining(num, n)
end

main()

Output

 Given Array 
   2   8   2   4   7   2   5   4   8   1
 Resultant Array 
   2   2   2   8   8   4   4   7   5   1
import scala.collection.mutable._;
/*
    Scala program
    Group the array elements by occurrence sequence
*/
class Grouping
{
	// Function which is display array elements
	def display(arr: Array[Int], n: Int): Unit = {
		var i: Int = 0;
		while (i < n)
		{
			print("   " + arr(i));
			i += 1;
		}
		print("\n");
	}
	// Combine group element
	def combining(arr: Array[Int], n: Int): Unit = {
		print("\n Given Array \n");
		// Display given array
		this.display(arr, n); 
		var map: Map[Int, Int] = Map();
		var result: Array[Int] = Array.fill[Int](n)(0);
		// Loop controlling variable
		var i: Int = 0;
		var j: Int = 0;
		var index: Int = 0;
		// iterate the loop through by size
		while (i < n)
		{
			if (map.contains(arr(i)))
			{
				map.addOne(arr(i), map.get(arr(i)).get + 1);
			}
			else
			{
				map.addOne(arr(i), 1);
			}
			i += 1;
		}
		// iterate the loop through by size
		i = 0;
		while (i < n)
		{
			if (map.contains(arr(i)))
			{
				// Get repeated element into resultant array
				while (j < map.get(arr(i)).get)
				{
					// next index location
					// Put element
					result(index) = arr(i);
					index += 1;
					j += 1;
				}
				map.remove(arr(i));
				j = 0;
			}
			i += 1;
		}
		// Display calculated result
		print(" Resultant Array \n");
		this.display(result, n);
	}
}
object Main
{
	def main(args: Array[String]): Unit = {
		var task: Grouping = new Grouping();
		// Define array of integer elements
		var num: Array[Int] = Array(2, 8, 2, 4, 7, 2, 5, 4, 8, 1);
		// Get the number of element
		var n: Int = num.length;
		task.combining(num, n);
	}
}

Output

 Given Array
   2   8   2   4   7   2   5   4   8   1
 Resultant Array
   2   2   2   8   8   4   4   7   5   1
import Foundation
/*
    Swift 4 program
    Group the array elements by occurrence sequence
*/
class Grouping
{
	// Function which is display array elements
	func display(_ arr: [Int], _ n: Int)
	{
		var i: Int = 0;
		while (i < n)
		{
			print("  ", arr[i], terminator: "");
			i += 1;
		}
		print(terminator: "\n");
	}
	// Combine group element
	func combining(_ arr: [Int], _ n: Int)
	{
		print("\n Given Array ");
		// Display given array
		self.display(arr, n); 
      	// Define empty dictionary
		var map = [Int: Int]();
		var result: [Int] = Array(repeating: 0, count: n);
		// Loop controlling variable
		var i: Int = 0;
		var j: Int = 0;
		var index: Int = 0;
		// iterate the loop through by size
		while (i < n)
		{
			if (map.keys.contains(arr[i]))
			{
				map[arr[i]] = map[arr[i]]! + 1;
			}
			else
			{
				map[arr[i]] = 1;
			}
			i += 1;
		}
		// iterate the loop through by size
		i = 0;
		while (i < n)
		{
			if (map.keys.contains(arr[i]))
			{
				// Get repeated element into resultant array
				while (j < map[arr[i]]!)
				{
					// next index location
					// Put element
					result[index] = arr[i];
					index += 1;
					j += 1;
				}
				map.removeValue(forKey: arr[i]);
				j = 0;
			}
			i += 1;
		}
		// Display calculated result
		print(" Resultant Array ");
		self.display(result, n);
	}
}
func main()
{
	let task: Grouping = Grouping();
	// Define array of integer elements
	let num: [Int] = [2, 8, 2, 4, 7, 2, 5, 4, 8, 1];
	// Get the number of element
	let n: Int = num.count;
	task.combining(num, n);
}
main();

Output

 Given Array
   2   8   2   4   7   2   5   4   8   1
 Resultant Array
   2   2   2   8   8   4   4   7   5   1
/*
    Kotlin program
    Group the array elements by occurrence sequence
*/
class Grouping
{
	// Function which is display array elements
	fun display(arr: Array < Int > , n: Int): Unit
	{
		var i: Int = 0;
		while (i < n)
		{
			print("   " + arr[i]);
			i += 1;
		}
		print("\n");
	}
	// Combine group element
	fun combining(arr: Array < Int > , n: Int): Unit
	{
		print("\n Given Array \n");
		// Display given array
		this.display(arr, n);
		var map = mutableMapOf<Int, Int>();
		var result: Array < Int > = Array(n)
		{
			0
		};
		// Loop controlling variable
		var i: Int = 0;
		var j: Int = 0;
		var index: Int = 0;
		// iterate the loop through by size
		while (i < n)
		{
			if (map.containsKey(arr[i]))
			{
				map.put(arr[i], map.getValue(arr[i]) + 1);
			}
			else
			{
				map.put(arr[i], 1);
			}
			i += 1;
		}
		// iterate the loop through by size
		i = 0;
		while (i < n)
		{
			if (map.containsKey(arr[i]))
			{
				// Get repeated element into resultant array
				while (j < map.getValue(arr[i]))
				{
					// next index location
					// Put element
					result[index] = arr[i];
					index += 1;
					j += 1;
				}
				map.remove(arr[i]);
				j = 0;
			}
			i += 1;
		}
		// Display calculated result
		print(" Resultant Array \n");
		this.display(result, n);
	}
}
fun main(args: Array <String> ): Unit
{
	var task: Grouping = Grouping();
	// Define array of integer elements
	var num: Array <Int> = arrayOf(2, 8, 2, 4, 7, 2, 5, 4, 8, 1);
	// Get the number of element
	var n: Int = num.count();
	task.combining(num, n);
}

Output

 Given Array
   2   8   2   4   7   2   5   4   8   1
 Resultant Array
   2   2   2   8   8   4   4   7   5   1


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