milynch20 · milynch20 · Jan 26, 2019 · Jan 26, 2019 · Jan 26, 2019 · Jan 26, 2019
diff --git a/README.md b/README.md
@@ -29,14 +29,22 @@ Demonstrate your understanding of this week's concepts by answering the followin
 Edit this document to include your answers after each question. Make sure to leave a blank line above and below your answer so it is clear and easy to read by your project manager
 
 1. Describe the biggest difference between `.forEach` & `.map`.
+    .map returns values, .forEach simply calls a function on each element in an array. 
 
 2. What is the difference between a function and a method?
+    A method is function that is a member of an object. 
 
 3. What is closure?
+    When an inner function has access to outer function's variables. 
 
 4. Describe the four rules of the 'this' keyword.
+    a. Window/Global Object Binding - When in global scope
+    b. Implicit Binding - Automatic
+    c. New Binding - Creating a new instance of an object
+    d. Explicit Binding - We control this
 
 5. Why do we need super() in an extended class?
+    It's used to tell a parent class' constructor to be concerned with the child's attributes. No need for Object.create(this, Class).
 
 ## Project Set up
 

diff --git a/challenges/classes.js b/challenges/classes.js
@@ -1,7 +1,26 @@
 // 1. Copy and paste your prototype in here and refactor into class syntax.
+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.
diff --git a/challenges/functions.js b/challenges/functions.js
@@ -6,26 +6,48 @@
   * The last parameter accepts a callback 
   * In the body of the function return the callback with the two parameters that you created
 */
+function consume (x, y, cb) {
+  return cb(x,y);
+}
 
 
 /* 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!"
 */
+function add(a,b){
+  return a+b
+ }
+
+ console.log(consume(2,2,add))
+
+ function consume(x,y,cb){
+  return cb(x,y)
+ }
+
+ function multiply(a,b){
+  return a*b
+ }
+ console.log(consume(10,16,multiply))
+
+function greeting (first_Name, last_Name) {
+  console.log(`Hello ${first_Name} ${last_Name}, 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!
+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: 
+// Explanation: Because it's in the scope of the function
 
 
 const external = "I'm outside the function";

diff --git a/challenges/index.html b/challenges/index.html
@@ -14,6 +14,6 @@
 </head>
 
 <body>
-  <h1>Sprint Challenge - Check your work in the console!</h1>
+  <h1>Sprint Challenge - Check your work in the console!!</h1>
 </body>
 </html>
diff --git a/challenges/objects-arrays.js b/challenges/objects-arrays.js
@@ -11,24 +11,48 @@
 // stegosaurus, herbivorous, 2000kg, 9m, Late Jurassic
 
 // velociraptor, carnivorous, 15kg, 1.8m, Late Cretaceious
+const tyrannosaurus = {
+  name: 'tyrannosaurus',
+  diet: 'carnivorous',
+  weight: '7000kg',
+  length: '12m',
+  period: 'Late Cretacious',
+  roar: 'RAWERSRARARWERSARARARRRR'
+}
+
+const stegosaurus = {
+  name: 'stegosaurus',
+  diet: 'herbivorous',
+  weight: '2000kg',
+  length: '9m',
+  period: 'Late Jurassic'
+}
+
+const velociraptor = {
+  name: 'velociraptor',
+  diet: 'carnivorous',
+  weight: '15kg',
+  length: '1.8m',
+  period: 'Late Cretacious'
+}
+
 
 // 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();
+console.log(tyrannosaurus.roar);
 
 
 // ==== Arrays ====
@@ -49,7 +73,14 @@ 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 = [];
+let universities = [];
+for(let i = 0; i  < graduates.length; i++) {
+  let allUniversities = {};
+  allUniversities.university = graduates[i].university;
+  universities.push(allUniversities);
+  //allUniversities = {};
+}
+
 console.log(universities)
 
 /* Request 2: Create a new array called contactInfo that contains both first name and email of each student. 
@@ -59,12 +90,29 @@ Name [email protected]
 
 Log the result of your new array. */
 const contactInfo = [];
+for(let i = 0; i  < graduates.length; i++) {
+  let info = {};
+  info.first_name = graduates[i].first_name;
+  info.email = graduates[i].email;
+  contactInfo.push(`${info.first_name} ${info.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 = [];
-console.log(uni);
+//let count = 0;
+function search(nameKey, myArray) {
+  for(let i = 0; i  < myArray.length; i++) {
+    let newObj = {};
+    newObj.university = myArray[i].university;
+    if(myArray[i] === nameKey) {
+      uni.push(newObj)
+    }
+  }
+}
+console.log(search('Uni', graduates)); //I am confusion, come back to later
 
 
 // ==== ADVANCED Array Methods ====
@@ -89,33 +137,45 @@ The zoo wants to display both the scientific name and the animal name in front o
 
 */
 const animalNames = [];
+zooAnimals.forEach(function(animal) {
+  animalNames.push(`Name: ${animal.animal_name}, Scientific: ${animal.scientific_name}`)
+})
 console.log(animalNames);
-
+ 
 /* Request 2: .map()    
 
-The zoos need a list of all their animal's names (names only, not scientific) converted to lower case.  Create a new array named lowerCase and map over each name to convert them all to lower case.  Log the resut.
+The zoos need a list of all their animal's names (names only, not scientific) converted to lower case.  Create a new array named lowerCase and map over each name to convert them all to lower case.  Log the result.
 
 */
+const lowerCase = zooAnimals.map((animals) => {
+  return animals.animal_name.toLowerCase();
+});
 
-const lowerCase = [];
 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 = [];
+const largerPopulation = zooAnimals.filter((pop) => {
+  return pop.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((popTotal, sum) => {
+  return popTotal + sum.population;
+}, 0);
 
+console.log(populationTotal);
 
 /* 
 

diff --git a/challenges/prototypes.js b/challenges/prototypes.js
@@ -6,7 +6,6 @@
   Create a constructor function named CuboidMaker that accepts properties for length, width, and 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
 
@@ -26,8 +25,28 @@
   Add properties and values of length: 4, width: 5, and height: 5 to cuboid.   
 */
 
-// Test your volume and surfaceArea methods by uncommenting the logs below:
-// console.log(cuboid.volume()); // 100
-// console.log(cuboid.surfaceArea()); // 130
+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
-Original file line number
+Diff line change
@@ Expand Up / @@ -14,6 +14,6 @@ @@
     </head>
     <body>
-      <h1>Sprint Challenge - Check your work in the console!</h1>
+      <h1>Sprint Challenge - Check your work in the console!!</h1>
     </body>
     </html>