gpDA

// recursion
const recursiveSumInteger = (number) => {
    if (number === 0) {
      return 0;
    }
    return number + recursiveSumInteger(number - 1);
}

gpDA

// recursion 1 - using helper function
const RecursiveHelperSumArr = (arr) => {
    let index = arr.length - 1;

    // helper function
    const recur = (curIndex, sum) => { 
      sum += arr[curIndex];
      if (curIndex === 0) return sum;
      return recur(curIndex - 1, sum); // decrement the index and recursion
    }

gpDA

// recursive
const recursiveOddOrEven = (number) => {
    if (number === 0) {
        return true;
    } else if (number === 1) {
        return false;
    } else {
        return recursiveOddOrEven(number - 2);
    } 
}

gpDA

// Things to go over
 // 1 - mongodb (mongoose ORM) list of strings & default
 // 2 - router middleware (koa)
 // 3 - CRUD (with simple validation) write / read /remove / update

////\\\\
// models/post.js
////\\\\
const mongoose = require('mongoose');

gpDA

// things to go over
 // 1 - IntersectionObserver why it is being loaded (rendering 20 players at a time vs. lazy loading)
 // 2 - lazy loading using `lazy` classname

async componentDidMount() {
    this.handleScroll();
}

handleScroll = () => {
    const lazys = document.querySelectorAll('.lazy');

gpDA

// want to go over
 // 1 - use of functional components
 // 2 - dynamic component `component :is`
<template functional>
  <header
    :class="[
      `${props.blockName}__text-head`,
      {'gls-download-content__text-head--no-msg':
        props.blockName === 'gls-download-content' && !props.commentMessage}]"
  >

gpDA

<docs>
- share-success-root-wrapper
 -- This class is to hide custom blur overflow from overlay-scrollbars modal
</docs>

// want to go over
 // 1 - use of overlay-scrollbars
 // 2 - use of `named slot`
 // 3 - dynamic classname
 // 4 - native SVG components

gpDA

// chunkUpload
 // uniformChunkRequest
 // partialChunkRequest
  // chunkRequestHelper

  // want to go over
   // 1 - uniform & partial upload (why there are 2 different functions)
   // 2 - use of `chunkRequestHelper` function to send headers & body (formData)
   // 3 - chunkStar & chunkEnd - how it's being calculated `chunkStart + CHUNK_SIZE > fileClone.size`

gpDA

// want to go over
 // 1 - use fo constants
 // 2 - cancelToken
 // 3 - progress upload + how `numberOfRequests` is being used to represent the multiple requests
 // 4 - `uploadFileResponseHelper` & `uploadFileErrorHelper` helper functions


// constants/file.constants.js

const CHUNK_SIZE = 1000 * 1000 * 100; // 100mb

gpDA

// ASSUMPTION
// text files will be placed in the same directory as the program file

// Question
// is the word case-insensitive? not specified in the problem statement
// so in the code below, I take care of each words as case-insensitive e.g.) so & So are the same words

// HOW TO RUN PROGRAM
// node <file_name> <sampleFile> <commonFile>
// for example, node test.js alice_in_wonderland.txt 1-1000.txt