Javascript Homework #3

statements-and-operators.js

/**
 * All men are mortal
 * Socrates is a man.
 * Therefore, socrates is mortal.
 */

const Man = function(name) {
  this.name = name;
};

// all men are mortals
const isMortal = (t) => t instanceof Man;

// Socrates is a man
const socrates = new Man('Socrates');

/**
 * if a man, or men, is a/are mortal(s)...
 *   and Socrates is a man...
 *   then, Socrates is a mortal
 */ 
if (socrates instanceof Man) {
  console.log(isMortal(socrates));
}

/**
 * This cake is either vanilla or chocolate.
 * This cake is not chocolate.
 * Therefore, this cake is vanilla.
 */

// This cake is either vanilla or chocolate.
const Cake = function(flavor) {
  this.flavors = ['vanilla', 'chocolate'];
  if (this.flavors.indexOf(flavor) === -1) {
    throw new Error('Flavor not allowed');
  };
  this.flavor = flavor;
}

const cake = new Cake('vanilla');

// This cake is not chocolate.
console.log(cake.flavor);

if (cake instanceof Cake && cake.flavor !== 'chocolate') {
  // Therefore, this cake is vanilla.
  console.log(cake.flavor === 'vanilla');
}