hw no 4 or ec

app.js

@@ -1,28 +1,47 @@
 /* The four rules for 'this';
 * in your own words. explain the four rules for the "this" keyword below.
-* 1. 
-* 2. 
-* 3. 
-* 4. 
+* 1. When a function is in the global scope, this inside the function will be the window object.
+* 2. When a function is called with a dot, this is whatever is preceding the dot
+* 3. When used with a constructor, this refers to the specific variable
+* 4. Call and Apply use the first argument passed to them to determine what this points to
 * write out a code example of each explanation above
-*/
+*/    
 
 // First Rule
+function sayHello(name) {
+  console.log('Hi' + name);
+  console.log(this);
+}
+sayHello('Sara')
 
 // Second Rule
+const Dog = {
+  name; 'Cooper';
+  func: function () {
+    return this.name;
+  }
+};
+console.log(Dog.func());
 
 // Third Rule
+function User(users) {
+  this.name = name
+}
+const richard = new User;
+console.log(richard.name);
 
 // Fourth Rule * you may want to use your third rule's example to accomplish this
 
-// explain closure 
+// explain closure Functions that have access to outer functions variables and scope
 
 function foo () {
   console.log(this); // what does this point to?
 };
+This points to the global window
 
 const counterFunction = () => {
   // this code is broken. figure out why, and tell us where the closure is when you fix it
+  let count = 0; // there was no place to start the count
   const changeCount = (value) => {
     count += value;
   };
@@ -52,17 +71,33 @@ 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.
-
+function Car(options) {
+  this.make = options.make;
+  this.model = options.model;
+  this.year = options.year;
+  this.speak = () => {
+    return `${this.make} ${this.model} ${this.year}`
+  };
+}
 // 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 Cars {
+  function (options) {
+    this.model = options.model;
+    this.make = options.make;
+    this.year = options.year;
+  }
+  speak(){
+    return `${this.make} ${this.model} ${this.year}`;
+  }
+}
 // extra credit
 
 // we didn't touch on Recursion in the lecture yet, but you're going to build a recursive function now