need to finish callbacks and closure

README.md

@@ -25,14 +25,19 @@ 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 team lead
 
 1. Briefly compare and contrast `.forEach` & `.map` (2-3 sentences max)
+The .forEach modify the array. The .map creates a new array.
 
 2. Explain the difference between a callback and a higher order function.
 
-3. What is closure?
+callbacks are passed into higher order functions. While
+higher order functions receive callbacks as arguments.
 
+3. What is closure?
+Closure reaches outside of a function if its scope doesn't have a variable that is define.
 4. Describe the four rules of the 'this' keyword.
-
+The this keyword to reference an object without having to refer to that object’s name. I like to personaly think of the word dude.
 5. Why do we need super() in an extended class?
+to bind classes to together to achieve some simple object inheritance
 
 ### Task 1 - Project Set up
 

challenges/arrays-callbacks.js

@@ -21,6 +21,7 @@ The zoos want to display both the scientific name and the animal name in front o
 
 */
 const displayNames = [];
+zooAnimals.forEach( arrItem => {displayNames.push(`Name: ${arrItem.animal_name} Scietific : ${arrItem.scientific_name}.`)})
 console.log(displayNames);
 
 /* Request 2: .map()
@@ -29,23 +30,25 @@ The zoos need a list of all their animal's names (animal_name only) converted to
 
 */
 
-const lowCaseAnimalNames = [];
+const lowCaseAnimalNames = zooAnimals.map(arrItem => arrItem.animal_name.toLowerCase());;
 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 = [];
+const lowPopulationAnimals = zooAnimals.filter(arrItem => 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;
+const populationTotal = zooAnimals.reduce((acc, animal)=>
+{ return acc + animal.population; 
+},0);
 console.log(populationTotal);
 
 
@@ -57,19 +60,44 @@ console.log(populationTotal);
   * The last parameter accepts a callback
   * The consume function should return the invocation of cb, passing a and b into cb as arguments
 */
+function highOrder (cb, a, b){
+  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!"
 */
+function add(num1, num2){
+  return num1 + num2;
+}
+
+function multiply(mu1,mu2){
+  return mu1 * mu2
+   }
+
+
+   function greeting(first,last){
+    return `Hello ${first} ${last}, nice to meet you!`
+     }
+
+
+function consume(a, b, func){
+return func(a,b);
+
+
+
+
+}
 
 
 /* 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!
 
 
 

challenges/classes.js

@@ -1,7 +1,24 @@
 // 1. Copy and paste your prototype in here and refactor into class syntax.
+class CuboidMaker1{
+    constructor (length, width, height){
+    this.length = length;
+    this.width = width;
+    this.height = height;
+    }
+//    this.volume = lenght * width * height;
+//    this.surfaceArea = length * width + length * height + width * height;
 
 // Test your volume and surfaceArea methods by uncommenting the logs below:
-// console.log(cuboid.volume()); // 100
-// console.log(cuboid.surfaceArea()); // 130
+    vol(){
+        return this.length * this.width * this.height;
+};
 
-// 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.
+sur(){ 
+    return (2 * (this.length * this.width + this.height * this.length + this.width * this.height))
+};};
+
+
+const cuboidthingy = new CuboidMaker1 (4, 5, 5);
+// 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.
+console.log(cuboidthingy.vol()); // 100
+console.log(cuboidthingy.sur()); // 130

challenges/closure.js

@@ -16,9 +16,17 @@ function myFunction() {
 }
 myFunction();
 
-// Explanation: 
-
+// Explanation: the reason why because of scoping. Scope feature starts from the variable being called on. If its not there thn it wil go outside of the function to look for it.
 
+
 /* Task 2: Counter */
+let cou = 4;
+
+function sumation (cou) {
+  for(let i = 0; i <= cou; i++){
+    cou++;
+}
 
+}
+console.log(sumation(4))
 /* Create a function called `sumation` that accepts a parameter and uses a counter to return the summation of that number. For example, `summation(4)` should return 10 because 1+2+3+4 is 10. */

challenges/index.html

@@ -7,7 +7,7 @@
 
   <title>Sprint Challenge</title>
 
-  <script src="objects-arrays.js"></script>
+  <script src="arrays-callbacks.js"></script>
   <script src="functions.js"></script>
   <script src="prototypes.js"></script>
   <script src="classes.js"></script>

challenges/prototypes.js

@@ -6,28 +6,37 @@
   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 () {
+  return (this.length * this.width * this.height);
+};
 
 /* == 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.height * this.length + 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.   
 */
-
+  const cuboid = 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(cuboid.volume()); // 100
+console.log(cuboid.surfaceArea()); // 130