diff --git a/README.md b/README.md index 408612117c..a65b72fee3 100644 --- a/README.md +++ b/README.md @@ -30,31 +30,41 @@ Edit this document to include your answers after each question. Make sure to lea 1. Describe the biggest difference between `.forEach` & `.map`. +*.map creates a new array while .forEach you have to pass a function into the () and it will return the answer for each varible in the array.* + 2. What is the difference between a function and a method? +*A function is used to preform a set of tasks or can create a value within after being invoked. A method is implicity passed using the 'this' keyword and is able to operate on data an object created.* + 3. What is closure? +*A closure is a function within another function that has access to the other functions surrounding it* + 4. Describe the four rules of the 'this' keyword. +*The four rules of the 'this' keyword are Window Binding (catchall of sorts, binds to window object), Implicit Binding (used when invoking a function using dot notation), New Binding (Using the 'this' keyword when creating a new object), and Explicit Binding (using a method on a function like .call() or .bind()).* + 5. Why do we need super() in an extended class? +*The super keyword is needed to call and access the parent object so we can use methods that we used perviously in the parent object.* + ## Project Set up Follow these steps to set up and work on your project: -- [ ] Create a forked copy of this project. -- [ ] Add TL 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 ``. -- [ ] 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 ``. +- [X] Create a forked copy of this project. +- [X] Add TL 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 ``. +- [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 ``. Follow these steps for completing your project: -- [ ] Submit a Pull-Request to merge Branch into master (student's Repo). -- [ ] Add your team lead as a Reviewer on the Pull-request +- [X] Submit a Pull-Request to merge Branch into master (student's Repo). +- [X] Add your team lead as a Reviewer on the Pull-request - [ ] TL then will count the HW as done by merging the branch back into master. @@ -66,19 +76,19 @@ 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 index 992e39dc0b..2d4d5e6d07 100644 --- a/challenges/classes.js +++ b/challenges/classes.js @@ -1,7 +1,27 @@ // 1. Copy and paste your prototype in here and refactor into class syntax. +class CuboidMaker { + constructor(cuboid){ + this.length = cuboid.length; + this.width = cuboid.width; + this.height = cuboid.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. \ No newline at end of file diff --git a/challenges/functions.js b/challenges/functions.js index 6e3688bfcc..47727a7876 100644 --- a/challenges/functions.js +++ b/challenges/functions.js @@ -6,6 +6,9 @@ * The last parameter accepts a callback * The consume function should return the invocation of cb, passing a and b into cb as arguments */ +const consume = function(a,b,cb) { + return cb(a,b); +}; /* Step 2: Create several functions to callback with consume(); @@ -13,19 +16,31 @@ * 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(num1, num2) { + return num1 * num2; + }; + + function greeting(first, last) { + return `Hello ${first} ${last}, 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: + // It can access the internal variable because closure scope allows the child function to access the variables of the parent functions, but the parent cannot access the variables of the child. + // Child can inherit from parent but parent cannot inherit from child. const external = "I'm outside the function"; diff --git a/challenges/index.html b/challenges/index.html index 5772804b7f..eb6997d904 100644 --- a/challenges/index.html +++ b/challenges/index.html @@ -13,7 +13,7 @@ - +

Sprint Challenge - Check your work in the console!

\ No newline at end of file diff --git a/challenges/objects-arrays.js b/challenges/objects-arrays.js index 659e3e149c..ed83171c1d 100644 --- a/challenges/objects-arrays.js +++ b/challenges/objects-arrays.js @@ -7,28 +7,49 @@ */ // tyrannosaurus, carnivorous, 7000kg, 12m, Late Cretaceous - +const tyrannosaurus = { + name: 'Tyrannosaurus', + diet: 'carnivorous', + weight: '7000kg', + length: '12m', + period: 'Late Cretaceous', + roar(){ + return '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 ==== @@ -52,6 +73,10 @@ const graduates = [ Once you have the new array created, sort the universities alphabetically and log the result. */ const universities = []; +for (let i = 0; i < graduates.length; i++) { + universities.push(graduates[i].university); +}; +universities.sort(); 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. @@ -61,10 +86,18 @@ The resulting contact information strings should have a space between the first Log the result of your new array. */ const contactInfo = []; +for (let i=0; i < graduates.length; i++) { + contactInfo.push(`${graduates[i].first_name} ${graduates[i].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 = []; +for (let i=0; i < graduates.length; i++) { + if (graduates[i].university.includes('Uni')) { + unisWithUni.push(graduates[i]); + }; +}; console.log(unisWithUni); @@ -91,6 +124,9 @@ The zoos want to display both the scientific name and the animal name in front o */ const displayNames = []; +zooAnimals.forEach((animal) => { + displayNames.push(`Name: ${animal.animal_name}, Scientific: ${animal.scientific_name}`); +}); console.log(displayNames); /* Request 2: .map() @@ -99,15 +135,19 @@ The zoos need a list of all their animal's names (animal_name only) converted to */ -const lowCaseAnimalNames = []; -console.log(lowCaseAnimalNames); +const lowerCaseAnimalNames = zooAnimals.map((animals) => { + return animals.animal_name.toLowerCase(); +}); +console.log(lowerCaseAnimalNames); /* 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((animal) => { + return animal.population < 5; +}); console.log(lowPopulationAnimals); /* Request 4: .reduce() @@ -115,7 +155,9 @@ console.log(lowPopulationAnimals); 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((total, animal) => { + return total += animal.population; +}, 0); console.log(populationTotal); diff --git a/challenges/prototypes.js b/challenges/prototypes.js index 4cafc33e95..7f9ff1f1b9 100644 --- a/challenges/prototypes.js +++ b/challenges/prototypes.js @@ -6,25 +6,38 @@ Create a constructor function named CuboidMaker that accepts properties for length, width, and height */ +// function CuboidMaker (cuboid) { +// this.length = cuboid.length; +// this.width = cuboid.width; +// this.height = cuboid.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.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