const yyyymmdstr = moment().format("YYYY/MM/DD")

const currentDate = moment().format("YYYY/MM/DD")

getUserInfo() getClientData() getCustomerRecord()

getUser()

// What the heck is 86400000 for? setTimeout(blastOff, 86400000)

// Declare them as capitalized named constants. const MILLISECONDS_PER_DAY = 60 * 60 * 24 * 1000 //86400000; setTimeout(blastOff, MILLISECONDS_PER_DAY)

const address = "One Infinite Loop, Cupertino 95014" const cityZipCodeRegex = /^[^,\\]+[,\\\s]+(.+?)\s*(\d{5})?$/ saveCityZipCode( address.match(cityZipCodeRegex)[1], address.match(cityZipCodeRegex)[2] )

const address = "One Infinite Loop, Cupertino 95014" const cityZipCodeRegex = /^[^,\\]+[,\\\s]+(.+?)\s*(\d{5})?$/ const [_, city, zipCode] = address.match(cityZipCodeRegex) || [] saveCityZipCode(city, zipCode)

const locations = ["Austin", "New York", "San Francisco"] locations.forEach((l) => { doStuff() doSomeOtherStuff() // ... // ... // ... // Wait, what is `l` for again? dispatch(l) })

const locations = ["Austin", "New York", "San Francisco"] locations.forEach((location) => { doStuff() doSomeOtherStuff() // ... // ... // ... dispatch(location) })

const Car = { carMake: "Honda", carModel: "Accord", carColor: "Blue", } function paintCar(car, color) { car.carColor = color }

const Car = { make: "Honda", model: "Accord", color: "Blue", } function paintCar(car, color) { car.color = color }

function createMicrobrewery(name) { const breweryName = name || "Hipster Brew Co." // ... }

function createMicrobrewery(name = "Hipster Brew Co.") { // ... }

const Animal = function (age) { if (!(this instanceof Animal)) { throw new Error("Instantiate Animal with `new`") } this.age = age } Animal.prototype.move = function move() {} const Mammal = function (age, furColor) { if (!(this instanceof Mammal)) { throw new Error("Instantiate Mammal with `new`") } Animal.call(this, age) this.furColor = furColor } Mammal.prototype = Object.create(Animal.prototype) Mammal.prototype.constructor = Mammal Mammal.prototype.liveBirth = function liveBirth() {} const Human = function (age, furColor, languageSpoken) { if (!(this instanceof Human)) { throw new Error("Instantiate Human with `new`") } Mammal.call(this, age, furColor) this.languageSpoken = languageSpoken } Human.prototype = Object.create(Mammal.prototype) Human.prototype.constructor = Human Human.prototype.speak = function speak() {}

class Animal { constructor(age) { this.age = age } move() { /* ... */ } } class Mammal extends Animal { constructor(age, furColor) { super(age) this.furColor = furColor } liveBirth() { /* ... */ } } class Human extends Mammal { constructor(age, furColor, languageSpoken) { super(age, furColor) this.languageSpoken = languageSpoken } speak() { /* ... */ } }

class Car { constructor(make, model, color) { this.make = make this.model = model this.color = color } setMake(make) { this.make = make } setModel(model) { this.model = model } setColor(color) { this.color = color } save() { console.log(this.make, this.model, this.color) } } const car = new Car("Ford", "F-150", "red") car.setColor("pink") car.save()

class Car { constructor(make, model, color) { this.make = make this.model = model this.color = color } setMake(make) { this.make = make // NOTE: Returning this for chaining return this } setModel(model) { this.model = model // NOTE: Returning this for chaining return this } setColor(color) { this.color = color // NOTE: Returning this for chaining return this } save() { console.log(this.make, this.model, this.color) // NOTE: Returning this for chaining return this } } const car = new Car("Ford", "F-150", "red").setColor("pink").save()

class Employee { constructor(name, email) { this.name = name this.email = email } // ... } // Bad because Employees "have" tax data. EmployeeTaxData is not a type of Employee class EmployeeTaxData extends Employee { constructor(ssn, salary) { super() this.ssn = ssn this.salary = salary } // ... }

class EmployeeTaxData { constructor(ssn, salary) { this.ssn = ssn this.salary = salary } // ... } class Employee { constructor(name, email) { this.name = name this.email = email } setTaxData(ssn, salary) { this.taxData = new EmployeeTaxData(ssn, salary) } // ... }