AlyssaSaez · AlyssaSaez · Apr 5, 2019 · Apr 5, 2019 · Apr 5, 2019 · Apr 5, 2019
diff --git a/README.md b/README.md
@@ -30,30 +30,58 @@ Edit this document to include your answers after each question. Make sure to lea
 
 1. Describe the biggest difference between `.forEach` & `.map`.
 
+Map returns a new array, foreach doesn't return anything, though they both iterate through the entire array.
+
 2. What is the difference between a function and a method?
 
+A method's defined as the property of the object, while a functions defined outside of the object.
+
 3. What is closure?
 
+Closure gives an inner function the ability to look outside it's local scope giving access to the outer functions variables.
+
+
 4. Describe the four rules of the 'this' keyword.
 
+Window Binding:
+Window Binding is when code is executed using "this" keyword as part of simple function 
+call then it refers to global or window object in case of browser. It is also default binding.
+
+Implicit Binding:
+Implicit Binding is when 'this' gets assigned almost automatically. You can see it on an object literal,
+if you create a method within an object. 'this' refers to the object holding the method.
+
+New Binding:
+New Binding is when you use the 'new' keyword to create an object from a constructer function. 
+In this case 'this' is bound to the 'new' object created by the constructor.
+
+Explicit Binding:
+
+Explicit Binding is when a function is called using call, apply, and bind method. 
+It's called explicit because you're explicitly passing it a 'this' keyword.
+
 5. Why do we need super() in an extended class?
 
+We need the super keyword because it allows access to and calls upon the functions on the object's parent constructor.
+
+
+
 ## Project Set up
 
 Follow these steps to set up and work on your project:
 
-- [ ] Create a forked copy of this project.
-- [ ] Add PM as collaborator on Github.
-- [ ] Clone your OWN version of Repo (Not Lambda's by mistake!).
-- [ ] Create a new Branch on the clone: git checkout -b `<firstName-lastName>`.
-- [ ] Create a pull request before you start working on the project requirements.  You will continuously push your updates throughout the project.
-- [ ] You are now ready to build this project with your preferred IDE
-- [ ] Implement the project on your Branch, committing changes regularly.
-- [ ] Push commits: git push origin `<firstName-lastName>`.
+- [x] Create a forked copy of this project.
+- [x] Add PM as collaborator on Github.
+- [x] Clone your OWN version of Repo (Not Lambda's by mistake!).
+- [x] Create a new Branch on the clone: git checkout -b `<firstName-lastName>`.
+- [x] Create a pull request before you start working on the project requirements.  You will continuously push your updates throughout the project.
+- [x] You are now ready to build this project with your preferred IDE
+- [x] Implement the project on your Branch, committing changes regularly.
+- [x] Push commits: git push origin `<firstName-lastName>`.
 
 Follow these steps for completing your project:
 
-- [ ] Submit a Pull-Request to merge <firstName-lastName> Branch into master (student's  Repo).
+- [x] Submit a Pull-Request to merge <firstName-lastName> Branch into master (student's  Repo).
 - [ ] Add your Project Manager as a Reviewer on the Pull-request
 - [ ] PM then will count the HW as done by  merging the branch back into master.
 
@@ -66,19 +94,19 @@ Your finished project must include all of the following requirements:
 
 ## Task 1: Objects and Arrays
 Test your knowledge of objects and arrays. 
-* [ ] Use the [objects-arrays.js](challenges/objects-arrays.js) link to get started.  Read the instructions carefully!
+* [x] Use the [objects-arrays.js](challenges/objects-arrays.js) link to get started.  Read the instructions carefully!
 
 ## Task 2: Functions
 This challenge takes a look at callbacks and closures as well as scope. 
-* [ ] Use the [functions.js](challenges/functions.js) link to get started. Read the instructions carefully!
+* [x] Use the [functions.js](challenges/functions.js) link to get started. Read the instructions carefully!
 
 ## Task 3: Prototypes
 Create constructors, bind methods, and create cuboids in this prototypes challenge.
-* [ ] Use the [prototypes.js](challenges/prototypes.js) link to get started. Read the instructions carefully!
+* [x] Use the [prototypes.js](challenges/prototypes.js) link to get started. Read the instructions carefully!
 
 ## Task 4: Classes
 Once you have completed the prototypes challenge, it's time to convert all your hard work into classes.
-* [ ] Use the [classes.js](challenges/classes.js) link to get started. Read the instructions carefully!
+* [x] Use the [classes.js](challenges/classes.js) link to get started. Read the instructions carefully!
 
 In your solutions, it is essential that you follow best practices and produce clean and professional results. Schedule time to review, refine, and assess your work and perform basic professional polishing including spell-checking and grammar-checking on your work. It is better to submit a challenge that meets MVP than one that attempts too much and does not.
 

diff --git a/challenges/classes.js b/challenges/classes.js
@@ -1,7 +1,81 @@
 // 1. Copy and paste your prototype in here and refactor into class syntax.
 
+///CuboidMaker Constructor Functions and Prototype Methods
+
+// const CuboidMaker = function(attributes) {
+//   this.length = attributes.length;
+//   this.width = attributes.width;
+//   this.height = attributes.height;
+// };
+
+
+// CuboidMaker.prototype.volume = function() {
+//   return this.length * this.width * this.height;
+// };
+
+// CuboidMaker.prototype.surfaceArea = function(length, width, height) {
+//   return (
+//     2 *
+//     (this.length * this.width +
+//       this.length * this.height +
+//       this.width * this.height)
+//   );
+// };
+
+
+//CuboidMaker Class & Methods
+
+class CuboidMaker {
+    constructor(attr) {
+      this.length = attr.length;
+      this.width = attr.width;
+      this.height = attr.height;
+    }
+    volume() {
+      return this.length * this.width * this.height;
+    }
+
+    surfaceArea() {
+      return (
+        2 *
+        (this.length * this.width +
+          this.length * this.height +
+          this.width * this.height)
+      );
+    }
+  }
+
+  const cuboid = new CuboidMaker ({
+    length: 4,
+    width: 5,
+    height: 5
+  });
+
 // Test your volume and surfaceArea methods by uncommenting the logs below:
-// console.log(cuboid.volume()); // 100
-// console.log(cuboid.surfaceArea()); // 130
+console.log(cuboid.volume()); // 100
+console.log(cuboid.surfaceArea()); // 130
+
+// Stretch Task: Extend the base class CuboidMaker with a sub class called CubeMaker.  Find out the formulas for volume and surface area for cubes and create those methods using the dimension properties from CuboidMaker.  Test your work by logging out your volume and surface area.
 
-// Stretch Task: Extend the base class CuboidMaker with a sub class called CubeMaker.  Find out the formulas for volume and surface area for cubes and create those methods using the dimension properties from CuboidMaker.  Test your work by logging out your volume and surface area.
+class CubeMaker extends CuboidMaker {
+    constructor(attr) {
+      super(attr);
+    }
+    volume() {
+      return this.length * this.width * this.height;
+    }
+
+    surfaceArea() {
+      return Math.pow(this.width, 2) * 6;
+    }
+  }
+
+  const cube = new CubeMaker({
+    length: 10,
+    height: 10,
+    width: 10
+  });
+
+  console.log(cube.volume());
+  console.log(cube.surfaceArea());
+
diff --git a/challenges/functions.js b/challenges/functions.js
@@ -7,26 +7,41 @@
   * In the body of the function return the callback with the two parameters that you created
 */
 
+const consume = (a, b, callback) => {
+  return callback(a, b);
+};
 
 /* Step 2: Create several functions to callback with consume();
   * Create a function named add that returns the sum of two numbers
   * Create a function named multiply that returns the product of two numbers 
   * Create a function named greeting that accepts a first and last name and returns "Hello first-name last-name, nice to meet you!"
 */
 
+const add = (a, b) => {
+  return a + b;
+};
 
-/* Step 3: Check your work by un-commenting the following calls to consume(): */
-// consume(2,2,add); // 4
-// consume(10,16,multiply); // 160
-// consume("Mary","Poppins", greeting); // Hello Mary Poppins, nice to meet you!
+const multiply = (a, b) => {
+  return a * b;
+};
+
+const greeting = (firstName, lastName) => {
+  return `Hello ${firstName} ${lastName}, nice to meet you!`;
+};
 
+/* Step 3: Check your work by un-commenting the following calls to consume(): */
+consume(2,2,add); // 4
+consume(10,16,multiply); // 160
+consume("Mary","Poppins", greeting); // Hello Mary Poppins, nice to meet you!
 
 // ==== Closures ==== 
 
 // Explain in your own words why `nestedfunction()` can access the variable `internal`.
 
 // Explanation: 
-
+//nestedFunction can access the variable internal because it console.logs it, or uses it in it's own local scope. 
+//Because it can't find the variable inside of it's own scope, it looks outside of it, and finds it in the prior function. 
+//Closures act like a backpack that allows the nested functions to be able to access variables upwards in the inheritance chain.
 
 const external = "I'm outside the function";
 

diff --git a/challenges/objects-arrays.js b/challenges/objects-arrays.js
@@ -8,27 +8,56 @@
 
 // tyrannosaurus, carnivorous, 7000kg, 12m, Late Cretaceious
 
+const tyrannosaurus = {
+  diet: "carnivorous",
+  weight: "7000Kg",
+  length: "12m",
+  period: "Late Cretaceious"
+};
+
 // stegosaurus, herbivorous, 2000kg, 9m, Late Jurassic
 
+const stegosaurus = {
+  diet: "herbivorous",
+  weight: "2000kg",
+  length: "9m",
+  period: "Late Jurassic"
+};
+
 // velociraptor, carnivorous, 15kg, 1.8m, Late Cretaceious
 
+const velociraptor = {
+  diet: "carnivorous",
+  weight: "15kg",
+  length: "1.8m",
+  period: "Late Cretaceious"
+};
+
 // Using your dinosaur objects, log answers to these questions:
 
 // How much did tyrannosaurus weigh?
-console.log();
+
+console.log(tyrannosaurus.weight);
 
 // What was the diet of a velociraptor?
-console.log();
+
+console.log(velociraptor.diet);
 
 // How long was a stegosaurus?
-console.log();
+
+console.log(stegosaurus.length);
 
 // What time period did tyrannosaurus live in?
-console.log();
+
+console.log(tyrannosaurus.period);
 
 
 // Create a new roar method for the tyrannosaurus.  When called, return "RAWERSRARARWERSARARARRRR!" Log the result.
-console.log();
+
+tyrannosaurus.roar = function() {
+  return "RAWERSRARARWERSARARARRRR!";
+};
+console.log(tyrannosaurus.roar());
 
 
 // ==== Arrays ====
@@ -49,21 +78,35 @@ const graduates = [{"id":1,"first_name":"Cynde","university":"Missouri Southern
 /* Request 1: Create a new array called universities that contains all the univeristies in the graduates array.  
 
 Once you have the new array created, sort the universities alphabetically and log the result. */
+
 const universities = [];
-console.log(universities)
+for(let graduate in graduates){
+  universities.push(graduates[graduate].university);
+}
+console.log(universities.sort())
 
 /* Request 2: Create a new array called contactInfo that contains both first name and email of each student. 
 
 The resulting contact information should have a space between the first name and the email information like this: 
 Name [email protected]
 
 Log the result of your new array. */
+
 const contactInfo = [];
+for(let graduate in graduates){
+  contactInfo.push(`${graduates[graduate].first_name} ${graduates[graduate].email}`);
+}
 console.log(contactInfo);
 
 
 /* Request 3: Find out how many universities have the string "Uni" included in their name. Create a new array called uni that contains them all. Log the result. */
+
 const uni = [];
+for(let graduate in graduates){
+  if(graduates[graduate].university.includes('Uni')){
+    uni.push(graduates[graduate]);
+  }
+}
 console.log(uni);
 
 
@@ -88,7 +131,9 @@ zooAnimals = [{"animal_name":"Jackal, asiatic","population":5,"scientific_name":
 The zoo wants to display both the scientific name and the animal name in front of the habitats.  Return an array with only the animal and scientific names in it.  The individual values in the array should look like this "Name: Jackal, asiatic, Scientific: Canis aureus."
 
 */
+
 const animalNames = [];
+zooAnimals.forEach(animal => animalNames.push(`Name: ${animal.animal_name} Scientific: ${animal.scientific_name}`));
 console.log(animalNames);
 
 /* Request 2: .map()    
@@ -97,24 +142,27 @@ The zoos need a list of all their animal's names (names only, not scientific) co
 
 */
 
-const lowerCase = [];
-console.log(lowerCase); 
+const lowerCase = zooAnimals.map(animal => animal.animal_name.toLowerCase());
+console.log(lowerCase);
 
 /* Request 3: .filter() 
 
 The zoos are concenred about animals with a lower population count. Find out which animals have a population less than 5.
 
 */
-const largerPopulation = [];
+
+const largerPopulation = zooAnimals.filter(animal => animal.population < 5);
+
 console.log(largerPopulation);
 
 /* Request 4: .reduce() 
 
 The zoos need to know their total animal population across the United States.  Find the total population from all the zoos using the .reduce() method.
 
 */
-const populationTotal = 0;
-console.log(populationTotal);
+
+const populationTotal = zooAnimals.reduce((totalPop, currentPop) => totalPop + currentPop.population, 0);
+console.log('Total: ' + populationTotal);
 
 
 /*