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54 changes: 42 additions & 12 deletions app.js
Original file line number Diff line number Diff line change
@@ -1,8 +1,8 @@
/* The four rules for 'this';
* in your own words. explain the four rules for the "this" keyword below.
* 1.
* 2.
* 3.
* 1. When a function is global, `this` refers to the window
* 2. `this` can refer to the object that `this` is inside of
* 3. `this` also refers to specific options that the constructed object has
* 4.
* write out a code example of each explanation above
*/
Expand All @@ -20,9 +20,9 @@
function foo () {
console.log(this); // what does this point to?
};

const counterFunction = () => {
// this code is broken. figure out why, and tell us where the closure is when you fix it
let count = 0; //THE CLOSURE IS HERE
const changeCount = (value) => {
count += value;
};
Expand Down Expand Up @@ -52,17 +52,40 @@ console.log(counter.total());
// your options object should have "make", "model", "year" properties on it
// assign these properties you pass in with options to the constructors 'this' object.
// add a speak() method to your object that when called will log out the car's make model and year.
/*
const Car = function (options) {
this.make = options.make;
this.model = options.model;
this.year = options.year;
this.speak = function () {
return `${options.make} ${options.model} ${options.year}`
}
}
//when you're done un comment the next few lines and run the file here in node `node app.js`.

// when you're done un comment the next few lines and run the file here in node `node app.js`.

// const herby = new Car({make: 'Volkswagen', model: 'Beetle', year: '1963'});
// console.log(herby.speak());
// const goldfinger = new Car({make: 'Aston Martin', model: 'DB5', year: '1964'});
// console.log(goldfinger.speak());

const herby = new Car({make: 'Volkswagen', model: 'Beetle', year: '1963'});
console.log(herby.speak());
const goldfinger = new Car({make: 'Aston Martin', model: 'DB5', year: '1964'});
console.log(goldfinger.speak());
*/

// once you get done with this, redo it all using the class keyword and a constructor function.

class Car {
constructor(make, model, year) {
this.make = make;
this.model = model;
this.year = year;
}
get speak () {
return `${this.make} ${this.model} ${this.year}`
}

}

const coleCar = new Car('Jeep', 'Grand Cherokee', '2010');
console.log(coleCar.speak);
// extra credit

// we didn't touch on Recursion in the lecture yet, but you're going to build a recursive function now
Expand All @@ -76,6 +99,13 @@ while(n >= 1) {
// write a function called countDown that does the exact same thing as above, but calls itself until it can't anymore.
// hint-> your base case will look like the logic in the while loop.



const countdown = (start) => {
if (start > 0) {
console.log(start);
return countdown(start - 1);
} else {
return start;
}
};
countdown(10);