jslnriot

function groupAnagrams(strs) {
  // create a hash map to store the words and their sorted versions as the keys
  let hash = {};

  // loop over the words
  for (let word of strs) {
    let cleansed = word.split("").sort().join("");
    // check if the sorted word is already in the map
    if (hash[cleansed]) {
      // if it is, add the word to the list of anagrams for that key

jslnriot

// create a new set
let mySet = new Set();

// add some values to the set
mySet.add(1);
mySet.add("hello");
mySet.add({x: 10, y: 20});

// check if a value is in the set
console.log(mySet.has(1)); // true

jslnriot

// create some sets
let setA = new Set([1, 2, 3, 4]);
let setB = new Set([3, 4, 5, 6]);
let setC = new Set([5, 6, 7, 8]);

// create a new set with the union of setA, setB, and setC
let unionSet = new Set([...setA, ...setB, ...setC]);
console.log(unionSet); // Set {1, 2, 3, 4, 5, 6, 7, 8}

// create a new set with the intersection of setA, setB, and setC

jslnriot

const simpleHash = {}
simpleHash[1] = 'first'
simpleHash[2] = 'second'
simpleHash[3] = 'third'

console.log(simpleHash) // prints  { '1': 'first', '2': 'second', '3': 'third' }

simpleHash[4] = 'fourth'
console.log(simpleHash) // prints { '1': 'first', '2': 'second', '3': 'third', '4': 'fourth' }

jslnriot

const hashmap = new Map()

hashmap.set(1, 'first')
hashmap.set(2, 'second')
hashmap.set(3, 'third')

console.log(' full ... ', hashmap)    // Map(3) { 1 => 'first', 2 => 'second', 3 => 'third' }
console.log('size ... ', hashmap.size)   // returns 3
console.log('.get ... ', hashmap.get(2)) // returns second
console.log('.has ... ', hashmap.has(3)) // returns true

jslnriot

const twoSum = (dataSet, target) => {
   const nums = {}
   // Can also use Map() and will work the same
   // const nums = new Map()
	
   for (const num of dataSet) {
      const potentialMatch = target - num
      console.log(nums)
      if(potentialMatch in nums) {
        return [potentialMatch, num] // found match so return current num + potentialMatch

jslnriot

import React from 'react';
import ReactDOM from 'react-dom';

class App extends React.Component {
  constructor(props) {
    super(props);
    this.state = { 
      example: 'test'
    };
  }

jslnriot

{
  "name": "amazon-web-scaper",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "dev": "nodemon -r esm index.js"
  },
  "keywords": [],

jslnriot

import axios from 'axios';
import cherrio from 'cheerio';

async function getHTML(productURL) {
  const { data: html } = await  axios.get(productURL, {
    headers: {
      'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.90 Safari/537.36'
    }
  })
  .catch(function (error) {

jslnriot

import { getHTML, getAmazonPrice } from './scrape';

const productURL = `https://www.amazon.ca/Vitamix-Explorian-Professional-Grade-Low-Profile-Refurbished/dp/B07CXVSMZ4/ref=sr_1_5?keywords=vitamix&qid=1555870204&s=gateway&sr=8-5&th=1`;

async function scrapePage() {
  const html = await getHTML(productURL);
  const amazonPrice = await getAmazonPrice(html);
  console.log(`The price is ${amazonPrice}`);
}