tca88 · tca88 · Feb 26, 2019 · Feb 26, 2019 · Feb 26, 2019
diff --git a/assignments/array-methods.js b/assignments/array-methods.js
@@ -55,29 +55,97 @@ const runners = [{"id":1,"first_name":"Charmain","last_name":"Seiler","email":"c
 
 // ==== Challenge 1: Use .forEach() ====
 // The event director needs both the first and last names of each runner for their running bibs.  Combine both the first and last names into a new array called fullName. 
+// let fullName = [];
+// console.log(fullName);
+
+//ANSWER
 let fullName = [];
+runners.forEach((runner) => {
+  fullName.push(`${runner.first_name} ${runner.last_name}`);
+});
+
 console.log(fullName);
 
+/////////////////////////////
+
 // ==== Challenge 2: Use .map() ====
 // The event director needs to have all the runner's first names converted to uppercase because the director BECAME DRUNK WITH POWER. Convert each first name into all caps and log the result
-let allCaps = [];
+// let allCaps = [];
+// console.log(allCaps); 
+
+//ANSWER
+let allCaps = runners.map(runner => runner.first_name.toUpperCase());
 console.log(allCaps); 
 
+/////////////////////////////
+
 // ==== Challenge 3: Use .filter() ====
 // The large shirts won't be available for the event due to an ordering issue.  Get a list of runners with large sized shirts so they can choose a different size. Return an array named largeShirts that contains information about the runners that have a shirt size of L and log the result
-let largeShirts = [];
+// let largeShirts = [];
+// console.log(largeShirts);
+
+//ANSWER
+let largeShirts = runners.filter(runner => runner.shirt_size === 'L');
 console.log(largeShirts);
 
+/////////////////////////////
+
 // ==== Challenge 4: Use .reduce() ====
 // The donations need to be tallied up and reported for tax purposes. Add up all the donations into a ticketPriceTotal array and log the result
-let ticketPriceTotal = [];
+// let ticketPriceTotal = [];
+// console.log(ticketPriceTotal);
+
+//ANSWER
+let ticketPriceTotal = runners.reduce(function(accumulator, currentValue) {
+  return accumulator + currentValue.donation;
+}, 0);
 console.log(ticketPriceTotal);
 
+/////////////////////////////
+
 // ==== Challenge 5: Be Creative ====
 // Now that you have used .forEach(), .map(), .filter(), and .reduce().  I want you to think of potential problems you could solve given the data set and the 5k fun run theme.  Try to create and then solve 3 unique problems using one or many of the array methods listed above.
 
 // Problem 1
+//ANSWER
+// The community center wants to curate all email addresses into a database to send out weekly newsletters to the business 
+// representatives. Gather all email addresses and place them into their own array.
+
+let emailAddress = [];
+runners.forEach((runner) => {
+  emailAddress.push(runner.email);
+});
+console.log(emailAddress);
+
+/////////////////////////////
 
 // Problem 2
+// ANSWER
+// The community center is ready to start the process of sending t-shirts out to all non-Large size representatives, 
+//and so first they need to tally up how many Small, Medium, XL, 2XL and 3XL orders they would need to submit. 
+
+let smallCount = runners.filter(runner => runner.shirt_size === 'S').length;
+console.log(smallCount);
+
+let mediumCount = runners.filter(runner => runner.shirt_size === 'M').length;
+console.log(mediumCount);
+
+let xlCount = runners.filter(runner => runner.shirt_size === 'XL').length;
+console.log(xlCount);
+
+let twoxlCount = runners.filter(runner => runner.shirt_size === '2XL').length;
+console.log(twoxlCount);
+
+let threexlCount = runners.filter(runner => runner.shirt_size === '3XL').length;
+console.log(threexlCount);
+
+/////////////////////////////
+
+// Problem 3
+//ANSWER
+// The community center wants to send a small Thank You gift card to representatives that donated $250 or more. 
+// But first, they need to gather all of these representatives and place them in a separate array containing all of 
+// their information.
 
-// Problem 3
+let highDonors = runners.filter(runner => runner.donation >= 250);
+console.log(highDonors);
diff --git a/assignments/callbacks.js b/assignments/callbacks.js
@@ -24,32 +24,111 @@ const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
 
 */
 
+/////////////////////////////
+
+// function getLength(arr, cb) {
+//   // getLength passes the length of the array into the callback.
+// }
+
+//ANSWER
 
 function getLength(arr, cb) {
-  // getLength passes the length of the array into the callback.
+  return cb(arr.length)
 }
 
+function lengthCallback (arrLength) {
+  console.log(arrLength);
+}
+
+// Function invocation
+
+getLength(items, lengthCallback);
+
+/////////////////////////////
+
+// function last(arr, cb) {
+//   // last passes the last item of the array into the callback.
+// }
+
+//ANSWER
+
 function last(arr, cb) {
-  // last passes the last item of the array into the callback.
+  return cb(arr[arr.length-1]);
 }
 
+function lastNameCallback(lastItem) {
+  console.log(lastItem);
+}
+
+// Function invocation
+
+last(items, lastNameCallback);
+
+/////////////////////////////
+
+// function sumNums(x, y, cb) {
+//   // sumNums adds two numbers (x, y) and passes the result to the callback.
+// }
+
+//ANSWER
+
 function sumNums(x, y, cb) {
-  // sumNums adds two numbers (x, y) and passes the result to the callback.
+  return cb(x + y);
+}
+
+function sumCallback(sum) {
+  console.log(sum);
 }
 
+// Function invocation
+
+sumNums(2, 3, sumCallback);
+
+/////////////////////////////
+
+// function multiplyNums(x, y, cb) {
+//   // multiplyNums multiplies two numbers and passes the result to the callback.
+// }
+
+//ANSWER
+
 function multiplyNums(x, y, cb) {
-  // multiplyNums multiplies two numbers and passes the result to the callback.
+  return cb(x * y);
 }
 
+function multiplyCallback(multiplication) {
+  console.log(multiplication);
+}
+
+// Function invocation
+
+multiplyNums(4, 4, multiplyCallback);
+
+/////////////////////////////
+
+// function contains(item, list, cb) {
+//   // contains checks if an item is present inside of the given array/list.
+//   // Pass true to the callback if it is, otherwise pass false.
+// }
+
+//ANSWER
+
 function contains(item, list, cb) {
-  // contains checks if an item is present inside of the given array/list.
-  // Pass true to the callback if it is, otherwise pass false.
+  return cb(list.includes(item));
+}
+
+function containsItemCallback(result) {
+  console.log(result);
 }
 
+contains("Pencil", items, containsItemCallback);
+
+/////////////////////////////
+
 /* STRETCH PROBLEM */
 
-function removeDuplicates(array, cb) {
-  // removeDuplicates removes all duplicate values from the given array.
-  // Pass the duplicate free array to the callback function.
-  // Do not mutate the original array.
-}
+// function removeDuplicates(array, cb) {
+//   // removeDuplicates removes all duplicate values from the given array.
+//   // Pass the duplicate free array to the callback function.
+//   // Do not mutate the original array.
+// }
diff --git a/assignments/closure.js b/assignments/closure.js
@@ -1,21 +1,59 @@
 // ==== Challenge 1: Write your own closure ====
 // Write a simple closure of your own creation.  Keep it simple!
 
+// ANSWER
+function revenueRecap() {
+  const dailyRevenue = [{"day": "Monday", "amount": 200}, {"day": "Tuesday", "amount": 150}, {"day": "Wednesday", "amount": 100}, {"day": "Thursday", "amount": 20}, {"day": "Thursday", "amount": 600}];
+
+const totalRevenue = dailyRevenue.reduce( function(accumulator, currentValue) {
+return accumulator + currentValue.amount;
+}, 0);
+console.log(`This week I made $${totalRevenue} from my online store`);
+//average revenue for the week
+function averageRevenue() {
+  const revenueArray = dailyRevenue.map(revenue => revenue.amount);
+  const average = totalRevenue / revenueArray.length;
+  console.log(`The average revenue for the week was $${average}, which seems low`);
+
+  // Lowest revenue day
+function lowestRevenueDay() {
+  const lowestDay = Math.min(...revenueArray);
+  console.log(`One of the main reasons the average is $${average} is because on Thursday we only made $${lowestDay}, which was our lowest day.`);
+  }
+lowestRevenueDay();
+}
+averageRevenue();
+}
+revenueRecap();
+
 
 /* STRETCH PROBLEMS, Do not attempt until you have completed all previous tasks for today's project files */
 
 
 // ==== Challenge 2: Create a counter function ====
-const counter = () => {
+// const counter = () => {
   // Return a function that when invoked increments and returns a counter variable.
-};
+// };
 // Example usage: const newCounter = counter();
 // newCounter(); // 1
 // newCounter(); // 2
 
+//ANSWER
+
+const counter = () => {
+  let count = 0;
+  return function () {
+    return ++count;
+  }
+};
+
+const newCounter = counter();
+console.log(newCounter());
+console.log(newCounter());
+
 // ==== Challenge 3: Create a counter function with an object that can increment and decrement ====
-const counterFactory = () => {
+// const counterFactory = () => {
   // Return an object that has two methods called `increment` and `decrement`.
   // `increment` should increment a counter variable in closure scope and return it.
   // `decrement` should decrement the counter variable and return it.
-};
+// };