JS Masterclass homework

part1.js

function logCar(options) {
  if (options.hasOwnProperty('make') && options.hasOwnProperty('color')) {
    console.log("I'm a " + options.color + " " + options.make);
  } else {
    console.log("Please supply make and color!");
  }
}

function Car(make, color) {
  this.make = make;
  this.color = color;
  
  this.log = function() {
    console.log("I'm a " + this.color + " " + this.make);
  }
}

part2.js

Function.prototype.cached = function() {
  if (this.hasOwnProperty('cache')) return this;
  
  return (function(self) {
    self.cache = {};
    
    return function(x) {
      if (x in self.cache) {
        return self.cache[x];
      } else {
        return self.cache[x] = self(x);
      }
    }
  })(this);
}