linzyk86 · linzyk86 · Mar 20, 2020 · Mar 20, 2020 · Mar 22, 2020
diff --git a/README.md b/README.md
@@ -30,14 +30,26 @@ Edit this document to include your answers after each question. Make sure to lea
 
 1. Describe the biggest difference between `.forEach` & `.map`.
 
+The difference between forEach and .map is that .map returns a new array so you just add what would be done to each item and they’re added into a new array automatically.  With a forEach you have to make the new array and use .push to add the new items to the new array.
+
 2. What is the difference between a function and a method?
 
+A method is a function on an object.
+
 3. What is closure?
 
+ Closure is a function and everything inside the function having access to outside references.
+
 4. Describe the four rules of the 'this' keyword.
 
+The 4 rules of the ‘this’ keyword are :  - When used in global scope, this is the window object - When used with dot notation, this is whatever is before the dot. -When using the New keyword, whatever is being defined with New is this -When using call or apply
+
 5. Why do we need super() in an extended class?
 
+Super is used in an extended class to bind classes together instead of using .call and object.create.
+
+
+
 ## Project Set up
 
 Follow these steps to set up and work on your project:

diff --git a/challenges/classes.js b/challenges/classes.js
@@ -1,7 +1,29 @@
 // 1. Copy and paste your prototype in here and refactor into class syntax.
 
+class CuboidMaker2{
+    constructor(length, width, height){
+    this.length = length;
+    this.width = width;
+    this.height = height;
+    }
+
+    volume(){
+    return (this.length * this.width * this.height);
+    }
+
+    surfaceArea(){
+  return (2 * ((this.length * this.width) + (this.length * this.height) + (this.width * this.height)))
+    }
+};
+
+let cuboid = new CuboidMaker2(4,5,5);
+
+
+
+
+
 // 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.
diff --git a/challenges/functions.js b/challenges/functions.js
@@ -6,27 +6,43 @@
   * The last parameter accepts a callback
   * The consume function should return the invocation of cb, passing a and b into cb as arguments
 */
+let consume = function(a, b, cb){
+  return (cb(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!"
+  * 
 */
 
+let add = function(num1, num2){
+  return num1+num2;
+}
+
+let multiply = function(num1, num2){
+  return num1*num2;
+}
+
+let greeting = function(firstName, lastName){
+  return `Hello ${firstName} ${lastName}, nice to meet you!`;
+}
+
 
 /* Step 3: Check your work by un-commenting the following calls to consume(): */
-// console.log(consume(2, 2, add)); // 4
-// console.log(consume(10, 16, multiply)); // 160
-// console.log(consume("Mary", "Poppins", greeting)); // Hello Mary Poppins, nice to meet you!
+ console.log(consume(2, 2, add)); // 4
+console.log(consume(10, 16, multiply)); // 160
+ console.log(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: 
-
+//Because it's inside of the function myFunction, so it has access to it.
 
 const external = "I'm outside the function";
 

diff --git a/challenges/objects-arrays.js b/challenges/objects-arrays.js
@@ -7,28 +7,53 @@
 */
 
 // tyrannosaurus, carnivorous, 7000kg, 12m, Late Cretaceous
+const dinosaur1 = {
+  name: "tyrannosaurus",
+   diet: "carnivorous",
+    weight:"7000kg", 
+    length: "12m",
+     period: "Late Cretaceous", 
+};
 
 // stegosaurus, herbivorous, 2000kg, 9m, Late Jurassic
-
+const dinosaur2 = {
+  name: "stegosaurus",
+  diet: "herbivorous",
+  weight: "2000kg",
+  length: "9m",
+  period: "Late Jurassic"
+  };
 // velociraptor, carnivorous, 15kg, 1.8m, Late Cretaceous
 
+const dinosaur3 = {
+  name: "velociraptor",
+   diet: "carnivorous",
+   weight: "15kg",
+   length: "1.8m", 
+   period: "Late Cretaceous" 
+   };
 // Using your dinosaur objects, log answers to these questions:
 
 // How much did tyrannosaurus weigh?
-console.log();
+console.log(dinosaur1.weight);
 
 // What was the diet of a velociraptor?
-console.log();
+console.log(dinosaur3.diet);
 
 // How long was a stegosaurus?
-console.log();
+console.log(dinosaur2.length);
 
 // What time period did tyrannosaurus live in?
-console.log();
+console.log(dinosaur1.period);
 
 
 // Create a new roar method for the tyrannosaurus.  When called, return "RAWERSRARARWERSARARARRRR!" Log the result.
-console.log();
+
+dinosaur1.roar = function(){
+  return("RAWERSRARARWERSARARARRRR!");
+}
+
+console.log(dinosaur1.roar());
 
 
 // ==== Arrays ====
@@ -51,7 +76,10 @@ const graduates = [
 /* Request 1: Create a new array called universities that contains all the universities in the graduates array. This will be an array of strings.
 
 Once you have the new array created, log the result. */
-const universities = [];
+let universities = graduates.map((arrItem)=>{
+  return arrItem.university;
+});
+
 console.log(universities);
 
 /* Request 2: Create a new array called contactInfo that contains both first name and email of each student. This will be an array of strings.
@@ -60,12 +88,24 @@ The resulting contact information strings should have a space between the first
 "Josh [email protected]"
 
 Log the result of your new array. */
-const contactInfo = [];
+let contactInfo = graduates.map((arrItem)=>{
+  return `${arrItem.first_name}, ${arrItem.email}`;
+});
+
 console.log(contactInfo);
 
 /* Request 3: Find out how many universities have the string "Uni" included in their name. Create a new array called unisWithUni that contains them all. This will be an array of objects. Log the result. */
-const unisWithUni = [];
-console.log(unisWithUni);
+
+
+let unisWithUni = graduates.map((arrItem)=>{
+  let hasUni = arrItem.university.includes("Uni"||"uni");
+  if(hasUni === true){
+    return arrItem.university;
+  };
+});
+     console.log(unisWithUni);
+
+
 
 
 // ==== ADVANCED Array Methods ====
@@ -82,40 +122,59 @@ const zooAnimals = [
   { animal_name: "Common melba finch", population: 5, scientific_name: "Pytilia melba", state: "Pennsylvania" },
   { animal_name: "Pampa gray fox", population: 10, scientific_name: "Pseudalopex gymnocercus", state: "Connecticut" },
   { animal_name: "Hawk-eagle, crowned", population: 10, scientific_name: "Spizaetus coronatus", state: "Florida" },
-  { animal_name: "Australian pelican", population: 5, scientific_name: "Pelecanus conspicillatus", state: "West Virginia" },
+  { animal_name: "Australian pelican", population: 5, scientific_name: "Pelecanus conspicillatus", state: "West Virginia" }
 ];
 
 /* Request 1: .forEach()
 
 The zoos want to display both the scientific name and the animal name in front of the habitats. Populate the displayNames array with only the animal_name and scientific_name of each animal. displayNames will be an array of strings, and each string should follow this pattern: "Name: Jackal, asiatic, Scientific: Canis aureus."
 
+
 */
-const displayNames = [];
-console.log(displayNames);
+  let displayNames = zooAnimals.forEach((arrItem)=>{
+  let newArr = [];
+  newArr.push(`Name: ${arrItem.animal_name}, Scientific: ${arrItem.scientific_name}`);
+  console.log(newArr);
+   return newArr;
+
+});
+
+
 
 /* Request 2: .map()
 
 The zoos need a list of all their animal's names (animal_name only) converted to lower case. Using map, create a new array of strings named lowCaseAnimalNames, each string following this pattern: "jackal, asiatic". Log the resut.
 
 */
+let lowCaseAnimalNames = zooAnimals.map((arrItem)=>{
+  let newItem = arrItem.animal_name.toLowerCase();
+  return newItem;
+})
 
-const lowCaseAnimalNames = [];
 console.log(lowCaseAnimalNames);
 
 /* Request 3: .filter() 
 
 The zoos are concerned about animals with a lower population count. Using filter, create a new array of objects called lowPopulationAnimals which contains only the animals with a population less than 5.
 
 */
-const lowPopulationAnimals = [];
+
+let lowPopulationAnimals = zooAnimals.filter((arrItem)=>{
+  return arrItem.population <5;
+
+})
 console.log(lowPopulationAnimals);
 
 /* 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. Remember the reduce method takes two arguments: a callback (which itself takes two args), and an initial value for the count.
 
 */
-const populationTotal = 0;
+
+let populationTotal = zooAnimals.reduce((accum, arrItem)=>{
+    return accum += arrItem.population;
+},0);
+
 console.log(populationTotal);
 
 

diff --git a/challenges/prototypes.js b/challenges/prototypes.js
@@ -5,29 +5,42 @@
 /* == Step 1: Base Constructor ==
   Create a constructor function named CuboidMaker that accepts properties for length, width, and height
 */
+function CuboidMaker(length, width, height){
+  this.length = length;
+  this.width = width;
+  this.height = height;
+}
 
 
 /* == Step 2: Volume Method ==
   Create a method using CuboidMaker's prototype that returns the volume of a given cuboid's length, width, and height
 
   Formula for cuboid volume: length * width * height
 */
-
+CuboidMaker.prototype.volume = function(){
+  let cubeVol = (this.length*this.width*this.height);
+  return cubeVol;
+}
 
 /* == Step 3: Surface Area Method ==
   Create another method using CuboidMaker's prototype that returns the surface area of a given cuboid's length, width, and height. 
 
   Formula for cuboid surface area of a cube: 2 * (length * width + length * height + width * height)
 */
+CuboidMaker.prototype.surfaceArea = function(){
+  return 2 * ((this.length * this.width) + (this.length * this.height) + (this.width * this.height));
+};
 
 
 /* == Step 4: Create a new object that uses CuboidMaker ==
   Create a cuboid object that uses the new keyword to use our CuboidMaker constructor
   Add properties and values of length: 4, width: 5, and height: 5 to cuboid.   
 */
+let newCuboid = new CuboidMaker(4,5,5);
+
 
 // Test your volume and surfaceArea methods by uncommenting the logs below:
-// console.log(cuboid.volume()); // 100
-// console.log(cuboid.surfaceArea()); // 130
+ console.log(newCuboid.volume()); // 100
+console.log(newCuboid.surfaceArea()); // 130
 
 
diff --git a/package-lock.json b/package-lock.json