One Quiz to Rule Them All

Instructions:

Fork this repository into your Github account. Any questions that require you to answer in your own words, but not write code (e.g. question 12) just edit this README with your answer.

Setup

cd lib && bower install
cd ..
http-server

Basics

For this section, I wrote some starter DOM elements in the index.html file.

Write a selector that selects only the first sibling li elements.
Make all li elements behave as inline elements.
Only the odd section elements should have a border.
Only the even li elements should have a lime background.
Only the first aside element in the 2nd section should have blue font color.
There are three div elements with instructions inside them about which side of the screen they should be displayed on. Follow those instructions.
Using vanilla JavaScript, update the HTML of the element with the id of vanilla_output with the following text: "This content generated with vanilla JavaScript".
Using jQuery, update the HTML of the element with the id of jquery_output with the following text: "This content generated with jQuery".

JavaScript concepts

Explain what hoisting is. Provide your answer below.

Student answer: Hoisting is a behavior where a variable declartaion is moved to the top of a function. It can be used before it has been declared

What is a callback? Why do we use them in JavaScript? Provide your answer, and code a simple example below.

**Student answer: a callback function is a function that is passed in as an argument to another "higher-order"function. Callbacks are used in javascript to prevent "blocking"

Example: function fullName(firstName, lastName, callback){ console.log("My name is " + firstName + " " + lastName); callback(lastName); }

var greeting = function(ln){ console.log('Welcome Mrs. ' + ln); };

fullName("Mary", "Kergosien", greeting); **

Functions and operators

In main.js do the following:

Write a function named modulus that takes two arguments. The function should use the modulo operator to return the remainder between the first and second arguments. e.g. modulus(10, 3) // Should return 1.
Write a function named doMath. This function takes three arguments. The first two will contain integer values. The third argument will be a function reference. Write two more functions named add and subtract. Execute the doMath function to add two numbers together. Then execute the doMath function to subtract the two numbers.

Arrays

In the main.js, I started you off with a simple array.

Write a function named sortedPlanets that returns an array of the planet names sorted alphabetically.
Write a function named reversedPlanets that returns an array of planet names that are reversed (i.e. "htraE").
Write a function named longPlanets that returns an array containing only the planet names that are 7 characters long, or longer.

IIFE

In the file named IIFE.js. Write an IIFE that defines a global variable named FruitMaker. It should contain a private array holding the following strings: "apples", "bananas", "cherries", "huckleberries".
The IIFE should expose in its public interface a getter named getFruits() that returns all fruits, and a setter named addFruit() that provides the ability to add a new fruit to the array.
In the file named AugmentedIIFE.js, augment FruitMaker with a function named slices() that accepts two arguments: the name of the fruit, and the number of slices to make. It should return an array containing the name of the fruit duplicated how ever many slices was requested.

For example: slices("apples", 2) should return ["apples", "apples"]

XHR

Write a function named getAnimals that uses the jQuery ajax method to retrieve the data/animals.json file. When you execute the functions, it should just log just the array of animals to the console when the async is complete. Make sure you provide a prompt of "animals" when logging the array.
What are the four HTTP verbs that you can use in an XHR that correspond to the CRUD actions (create, read, update, delete)? **Student answer: GET, POST, PUT, DELETE **
Why did we use Promises when dealing with asynchronous XHR calls? **Student answer: A promise will wait until the asynchronous XHR call is made to receive a response or error. A function will not execute until the promise returns a response. **
Provide a simple example of the syntax for handling a Promise. **Student answer: function promise() { var deferred = Q.defer(); $.ajax({ url: 'data.json' }).done(function(data) { deferred.resolve(data); }).error(function(error) { deferred.reject(error); }); return deferred.promise; } **

Scope and this

What gets logged to the console when the following code executes? Explain why.

**Student answer: ** Never got scopes.... still dont get scopes ={ Can you explain What and Why to me??

var answer = "42";

function steve() {
  luke();
}

function luke() {
  var answer = "0";
  greg(answer);
}

function greg(answer) {
  var answer = "666";
  console.log( this.answer );
}

steve();

MKergosien/theonequiz