Completed JavaScript-II project

assignments/array-methods.js

@@ -58,28 +58,54 @@ const runners = [
 // ==== 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 and populate a new array called `fullNames`. This array will contain just strings.
 let fullNames = [];
+runners.forEach(function(runner) {
+  fullNames.push(`${runner.first_name} ${runner.last_name}`);
+})
 console.log(fullNames);
 
 // ==== Challenge 2: Use .map() ====
 // The event director needs to have all the runners' first names in uppercase because the director BECAME DRUNK WITH POWER. Populate an array called `firstNamesAllCaps`. This array will contain just strings.
 let firstNamesAllCaps = [];
+firstNamesAllCaps = runners.map(runner => runner.first_name.toUpperCase());
 console.log(firstNamesAllCaps);
 
 // ==== Challenge 3: Use .filter() ====
 // The large shirts won't be available for the event due to an ordering issue. We need a filtered version of the runners array, containing only those runners with large sized shirts so they can choose a different size. This will be an array of objects.
 let runnersLargeSizeShirt = [];
+runnersLargeSizeShirt = runners.filter(runner => runner.shirt_size === 'L');
 console.log(runnersLargeSizeShirt);
 
 // ==== Challenge 4: Use .reduce() ====
 // The donations need to be tallied up and reported for tax purposes. Add up all the donations and save the total into a ticketPriceTotal variable.
 let ticketPriceTotal = 0;
+ticketPriceTotal = runners.reduce((acc, runner) => {
+  return acc += runner.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
+// Create a filtered version of the runners array containing only those runners from Skinix
+let runnersSkinix = [];
+runnersSkinix = runners.filter(runner => runner.company_name === 'Skinix');
+console.log(runnersSkinix);
 
 // Problem 2
+// Combine the first name, last name, and email addresses of the runners from Skinix into a new array
+let runnersFullNamesSkinix = [];
+runnersSkinix.forEach(function(runner) {
+  runnersFullNamesSkinix.push(`${runner.first_name} ${runner.last_name} ${runner.email}`);
+})
+console.log(runnersFullNamesSkinix);
 
-// Problem 3
+// Problem 3
+// Add up all of the donations from Skinix runners who donated more than $100
+let SkinixSubTotal = 0;
+SkinixSubTotal = runnersSkinix
+  .filter(runner => runner.donation > 100)
+  .reduce((acc, runner) => {
+    return acc += runner.donation;
+}, 0);
+console.log(SkinixSubTotal);

assignments/callbacks.js

@@ -41,25 +41,89 @@ const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
 
 function getLength(arr, cb) {
   // getLength passes the length of the array into the callback.
+  return cb(arr.length);
 }
+// TEST 1
+const test1 = getLength(items, length => `I have ${length} items!`);
+console.log(test1); // 'I have 4 items!'
+
+// TEST 2
+function purchasedNew(count) {
+  return `I bought all ${count} items yesterday!`;
+}
+const test2 = getLength(items, purchasedNew);
+console.log(test2); // 'I bought all 4 items yesterday!'
+
 
 function last(arr, cb) {
   // last passes the last item of the array into the callback.
+  return cb(arr[arr.length - 1]);
+}
+// TEST 3
+const test3 = last(items, favorite => `I love ${favorite}!`);
+console.log(test3); // 'I love Gum!'
+
+// TEST 4
+function purchasedToday(element) {
+  return `I bought ${element} today!`;
 }
+const test4 = last(items, purchasedToday);
+console.log(test4); // 'I bought Gum today!'
+
 
 function sumNums(x, y, cb) {
   // sumNums adds two numbers (x, y) and passes the result to the callback.
+  return cb(x + y);
+}
+// TEST 5
+const test5 = sumNums(1, 4, total => `We ate ${total} apples.`);
+console.log(test5); // 'We ate 5 apples.'
+
+// TEST 6
+function classSchedule(credits) {
+  return `I am taking ${credits} courses this semester.`
 }
+const test6 = sumNums(3, 1, classSchedule);
+console.log(test6); // 'I am taking 4 courses this semester.'
+
 
 function multiplyNums(x, y, cb) {
   // multiplyNums multiplies two numbers and passes the result to the callback.
+  return cb(x * y);
 }
 
+// TEST 7
+const test7 = multiplyNums(5, 2, product => `We have ${product} pairs of clean socks left.`);
+console.log(test7); // 'We have 10 pairs of clean socks left.'
+
+// TEST 8
+function milesToGo(distance) {
+  return `I have to run ${distance} miles tomorrow.`;
+}
+const test8 = multiplyNums(2, 3, milesToGo);
+console.log(test8); // 'I have to run 6 miles tomorrow.'
+
+
 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.
+  for (let i = 0; i < list.length; ++i) {
+    if (list[i] === item) {
+      return cb(true);
+    }
+  }
+  return cb(false);
 }
 
+// TEST 9a
+const test9a = contains('Gum', items, result => `${result}`);
+console.log(test9a); // 'true'
+
+// TEST 9b
+const test9b = contains('gum', items, result => `${result}`);
+console.log(test9b); // 'false'
+
+
 /* STRETCH PROBLEM */
 
 function removeDuplicates(array, cb) {

assignments/closure.js

@@ -3,7 +3,13 @@
 // Keep it simple! Remember a closure is just a function
 // that manipulates variables defined in the outer scope.
 // The outer scope can be a parent function, or the top level of the script.
-
+const appleCount = 2;
+const pearCount = 1;
+function returnTotalFruit () {
+  TotalFruit = appleCount + pearCount;
+  console.log('I ate ' + TotalFruit + ' pieces of fruit today.');
+}
+returnTotalFruit();
 
 /* STRETCH PROBLEMS, Do not attempt until you have completed all previous tasks for today's project files */