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class Animal {
  constructor(name, energy) {
    this.name = name
    this.energy = energy
  }

  eat(amount) {
    console.log(`${this.name} is eating.`)
    this.energy += amount
  }

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class Animal {
  constructor(name, energy) {
    this.name = name
    this.energy = energy
  }

  eat(amount) {
    console.log(`${this.name} is eating.`)
    this.energy += amount
  }

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function anagram(first, second) {
  let one = [...first];
  let two = [...second];
  let temp = {}
  const len = one.length === two.length;

  if (len) {
    temp = one.reduce(function (letters, letter) {
      if (letter in letters) {
        letters[letter]++

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function hasDuplicates(numbers) {
  let memo = {};
  let count = 0;
  numbers.map(number => {
    if (!memo[number]) {
      memo[number] = 1;
    } else {
      count++;
    }

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# coding: utf-8
import oauth2 as oauth
import json

CONSUMER_KEY = "yT577ApRtZw51q4NPMPPOQ"
CONSUMER_SECRET = "3neq3XqN5fO3obqwZoajavGFCUrC42ZfbrLXy5sCv8"
ACCESS_KEY = ""
ACCESS_SECRET = ""

consumer = oauth.Consumer(key=CONSUMER_KEY, secret=CONSUMER_SECRET)

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/*
* Object Destructuring
*/
const book = {
  title: 'ReWork',
  author: 'Some guy',
  publisher: {
    name: 'Penguin'
  }
}

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// Higher Order Component (HOC) : A component that renders another component
// Goal: Reduce code, render hijacking, prop manipulation, abstract state
// Inspired by mead.io videos on Udemy

import React from 'react'
import reactDOM from 'react-dom'

const info = (props) => (
  <div>
    <h1>Hello { props.isAdmin ? 'admin' : 'guest' }</h1>

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/*
*     forEach
*/
// forEach is very simlar to for-looping arr.length
// array.forEach(callback, context)
var arr = ['apple', 'orange', 'watermelon', 10, 20, 30]

arr.forEach((value, index) => console.log(`Element's ${index} type is ${typeof value}`))
// Prints:
// Element 0 type is string

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class Person {
  constructor(name = 'Anonymous', age = 0) {
    this.name = name
    this.age = age
  }
  getGreeting(){
    return `Hi, I am ${this.name}`
  }
  getDescription(){
    return `${this.name} is ${this.age} years old`

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/*
* ** Diffrence between Tasks and Promises:
* Once settled, a promise can not be resettled. Calling resolve() or reject() again will have no effect. The immutability of a settled promise is an important feature.
* https://medium.com/javascript-scene/master-the-javascript-interview-what-is-a-promise-27fc71e77261
* *** First arg is for 'resolved' status, and the second is for 'rejected'
*/

// exampe 1
const myPromise = function () {
  return new Promise((Yay, Nay) => {