DanishSiddiq

function calculateSomeFormula(param1, param2) {

  validateParams(param1, param2);

  return (param1 * 2) * (param2 * 3);
}

// although return value is not used in our example but this method can also return value which can be used by the caller 
function validateParams(param1, param2) {
  if (!param1) {

DanishSiddiq

function calculateSomeFormula(param1, param2) {
  if (!param1) {
    throw new Error('Param1 is not defined');
  }

  if (isNaN(param1)) {
    throw new Error('Param1 is not a number');
  }

  if (!param2) {

DanishSiddiq

function calculateSomeFormula(param1, param2) {
  if (param1) {
    if (!isNaN(param1)) {
      if (param2) {
        if (!isNaN(param2)) {
          return (param1 * 2) * (param2 * 3);
        } else {
          throw new Error('Param2 is not a number');
        }
      } else {

DanishSiddiq

{
  "studentId": "5e727fa7b9f23a1c643e671f",
  "firstName": "Danish",
  "lastName": "Siddiq",
  "registrationNumber": 543678,
  "email": "[email protected]"
}

DanishSiddiq

query getStudent($studentId: String, $firstName: String) {
  byId: findOne(input: {_id: $studentId}) {
    ...studentFields
  }
  byName: findOne(input: {firstName: $firstName}) {
    ...studentFields
  }
}

mutation createStudent($firstName: String!, $lastName: String!, $registrationNumber: Int!, $email: String!) {

DanishSiddiq

const { Router } = require('express');
const express_graphql = require('express-graphql');
const { buildSchema } = require('graphql');

const studentController = require('./student.ctrl');

// GraphQL schema
const schema = buildSchema(`
    scalar Date
    , input SearchInput {

DanishSiddiq

module.exports = {
    apps : [
        {
            name      : 'Custering',
            script    : 'Clustering/src/app.babel-register.js',
            exec_mode : 'cluster_mode',
            instances : 'max'
        },
        {
            name      : 'Clustering_Replcia',

DanishSiddiq

// parentPort for registering to events from main thread
// workerData for receiving data clone
const {  parentPort, workerData } = require('worker_threads');

let interval;
let index = -1;

registerForEventListening();

function registerForEventListening () {

DanishSiddiq

// module included to create worker threads
const { Worker } = require('worker_threads');

// main attributes
let lst;    // list will be populated from 0 to n
let index = -1; // index will be used to traverse list
let myWorker; // worker reference
let interval;

mainBody();

DanishSiddiq

export default class AsyncListController {

    createList = async(req, res) => {
        await this.populateHugeList();
        res.json({ ProcessId: 'Worker Process Id' + process.pid });
    };

    /* populate list with million elements
     */
    populateHugeList = async() => {