RahulBRB

#BFS
from collections import defaultdict

class Graph:
    def __init__(self):
        self.graph=defaultdict(list)

    def add_edge(self, u , v):
        self.graph[u].append(v)
        self.graph[v].append(u)

RahulBRB

let http = require('http');
let fs = require('fs');
let port = 8772;

let server = http.createServer(function(req, res){
    fs.readFile('db.json','utf-8',function(err, data){
        if(err) throw err;
        res.write(data);
        res.end()
    })

RahulBRB

let http = require('http');

//req > what we send to server (params,queryParams,body)
//res > what server send us

let server = http.createServer((req,res) => {
    res.write('Hii From Http Server');
    res.end()
})

RahulBRB

let fs = require('fs')

//write file
fs.writeFile('myFile.txt','NodeJs code in code sample', function(){
     console.log('File Create')
 })

//append file
fs.appendFile('myCode.txt','My code append \n',function(){
     console.log('File Appended')

RahulBRB

#include <iostream>
#include <cstdlib>
using namespace std;
 
// Define the default capacity of a stack
#define SIZE 10
 
// A class to represent a stack
template <class X>
class stack

RahulBRB

#include<iostream>
using namespace std;
class Node;
class Polynomial;
class Term
{
    int exponent;
    double coeff;

RahulBRB

#include<iostream>
#include<cmath>
using namespace std;

class Vertex
{
    int x_coordinate, y_coordinate;

    public :

RahulBRB

#include<iostream>
using namespace std;
class Meter;
class Distance
{
    int feet,inches;
    public:
        Distance();
        Distance(int feet);

RahulBRB

#include<iostream>
using namespace std;
class Fraction
{
    int numerator,denominator;
    public:
        Fraction();
        Fraction(int num,int deno);
        Fraction operator+(Fraction a);

RahulBRB

#include<iostream>
using namespace std;
class Complex{
    private:
    int real;
    int imag;

    public:
    // Default constructor
    Complex(){