munal92 · munal92 · Oct 12, 2019
diff --git a/README.md b/README.md
@@ -30,14 +30,27 @@ Edit this document to include your answers after each question. Make sure to lea
 
 1. Describe the biggest difference between `.forEach` & `.map`.
 
+ for each doing the function command for each element of the array. Map basically copy an array and create a new array
+
 2. What is the difference between a function and a method?
 
+functions are block of code which takes parameters and invokes when we call them methods doesnt take parameters  but have objects and they invoke them when we want to reach the object or function
+
 3. What is closure?
 
+closure is a combination of a function and gives us to access outside of the scope
+
 4. Describe the four rules of the 'this' keyword.
 
+if this in the global scope, this will be the wwindow object
+if a function called by dot (Object.funtion()) then .this left side of the dot
+if constructor function used then this refers to that object what we created by new() 
+if we use call() or apply() method then these methods explicitly sets what this points to. 
+
 5. Why do we need super() in an extended class?
 
+To reach  or call to parent's class and access the function in parent's class
+
 ## Project Set up
 
 Follow these steps to set up and work on your project:
@@ -66,19 +79,19 @@ 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 +1,50 @@
 // 1. Copy and paste your prototype in here and refactor into class syntax.
 
+class CuboidMaker2 {
+    constructor(properts){
+
+
+    this.length = properts.length;
+    this.width = properts.width;
+    this.height= properts.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 cuboid2 = new CuboidMaker2( {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(cuboid2.volume()); // 100
+console.log(cuboid2.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.
+
+class CubeMaker extends CuboidMaker2 {
+    constructor(attr){
+        super(attr);
+    }
+    surfaceCube(){
+        return 6 * this.height * this.width;
+      }
+        volume (){
+          return this.length * this.height * this.width;
+        }
+}
 
-// 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.
+const cuboid3 = new CubeMaker({length: 5, width: 5, height: 5  });
+console.log(cuboid3.surfaceCube());
+console.log(cuboid3.volume());
diff --git a/challenges/functions.js b/challenges/functions.js
@@ -6,26 +6,36 @@
   * The last parameter accepts a callback
   * The consume function should return the invocation of cb, passing a and b into cb as arguments
 */
-
+function consume(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!"
 */
-
+function add(a,b){
+  return a+b;
+}
+function multiply(a,b){
+  return a*b;
+}
+function greeting(first_name,last_name){
+  return `Hello ${first_name} ${last_name}, 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: 
+// Explanation:  Because it is  inside the myfunction and it has access to the variables inside of it
 
 
 const external = "I'm outside the function";

diff --git a/challenges/objects-arrays.js b/challenges/objects-arrays.js
@@ -8,27 +8,57 @@
 
 // tyrannosaurus, carnivorous, 7000kg, 12m, Late Cretaceous
 
+
+  const tyrannosaurus = {
+    name: "tyrannosaurus",
+    diet : "carnivorous",
+    weight:"7000kg",
+    length:"12m",
+    period : "Late Cretaceous",
+    roar: function(){
+    return console.log("RAWERSRARARWERSARARARRRR!");
+  }
+  }
+
+
 // stegosaurus, herbivorous, 2000kg, 9m, Late Jurassic
 
+const stegosaurus = {
+  name: "stegosaurus",
+  diet : "herbivorous",
+  weight:"2000kg",
+  length:"9m",
+  period : "Late Jurassic"
+}
+
 // velociraptor, carnivorous, 15kg, 1.8m, Late Cretaceous
 
+const velociraptor = {
+  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(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 ====
@@ -48,11 +78,13 @@ const graduates = [
   { id: 10, first_name: "Hube", university: "Universitat Rovira I Virgili Tarragona", email: "[email protected]" },
 ];
 
-/* Request 1: Create a new array called universities that contains all the universities in the graduates array. This will be an array of strings.
+/* 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, sort the universities alphabetically and log the result. */
 const universities = [];
-console.log(universities);
+const uniName = graduates.map(item => universities.push(item.university));
+console.log(universities.sort());
 
 /* 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.
 
@@ -61,10 +93,21 @@ The resulting contact information strings should have a space between the first
 
 Log the result of your new array. */
 const contactInfo = [];
+
+const nameAndEmail = graduates.map(item => contactInfo.push(item.first_name+" "+item.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. */
+/* 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 = [];
+
+const findUni = graduates.map(item => {
+    if(item.university.includes("Uni")){
+       unisWithUni.push(item.university);
+    }
+
+  });
 console.log(unisWithUni);
 
 
@@ -87,10 +130,16 @@ const zooAnimals = [
 
 /* 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."
+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 = [];
+
+
+const nameandScientific = zooAnimals.forEach(item => displayNames.push(`Name: ${item.animal_name}, Scientific: ${item.scientific_name}`));
+
 console.log(displayNames);
 
 /* Request 2: .map()
@@ -100,22 +149,39 @@ The zoos need a list of all their animal's names (animal_name only) converted to
 */
 
 const lowCaseAnimalNames = [];
+const lowerCaseAnNm = zooAnimals.map(anim => lowCaseAnimalNames.push(anim.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.
+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 lowPopAn = zooAnimals.filter(item => {
+  if(item.population<5){
+
+       lowPopulationAnimals.push(item.animal_name + " /population: "+item.population);
+  }
+}
+  );
 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.
+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 = 0;
+//const reducer = (accumulator, currentValue) => accumulator + currentValue;
+populationTotal = zooAnimals.reduce((total,item)=> {
+           return item.population + total;
+
+},0);
+
 console.log(populationTotal);
 
 

diff --git a/challenges/prototypes.js b/challenges/prototypes.js
@@ -5,6 +5,15 @@
 /* == Step 1: Base Constructor ==
   Create a constructor function named CuboidMaker that accepts properties for length, width, and height
 */
+
+function CuboidMaker (properts){
+
+  this.length = properts.length;
+  this.width = properts.width;
+  this.height= properts.height;
+
+}
+
 
 
 /* == Step 2: Volume Method ==
@@ -13,21 +22,32 @@
   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.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.   
 */
 
+ 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