bloominstituteoftechnology · abravebee · Aug 7, 2018 · Aug 7, 2018
diff --git a/assignments/array-methods.js b/assignments/array-methods.js
@@ -56,11 +56,20 @@ 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 = [];
+runners.forEach(function(element) {
+    fullName.push(element.first_name + " " + element.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 = [];
+
+
+
 console.log(allCaps); 
 
 // ==== Challenge 3: Use .filter() ====

diff --git a/assignments/callbacks.js b/assignments/callbacks.js
@@ -2,33 +2,96 @@ const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
 
 function firstItem(arr, cb) {
   // firstItem passes the first item of the given array to the callback function.
+return cb(arr[0]);
 }
 
+firstItem(items, function(first) {
+  console.log(first);
+})
+
 function getLength(arr, cb) {
   // getLength passes the length of the array into the callback.
+  return cb(arr.length);
 }
 
+getLength(items, function(lgth) {
+  console.log(lgth);
+})
+
 function last(arr, cb) {
   // last passes the last item of the array into the callback.
+  return cb(arr[arr.length - 1]);
 }
 
+last(items, function(last) {
+  console.log(last); // Gum
+})
+
 function sumNums(x, y, cb) {
   // sumNums adds two numbers (x, y) and passes the result to the callback.
+  return cb(x + y);
 }
 
+sumNums(3, 4, function(add) {
+  console.log(add); // 7
+}) 
+
+sumNums(5, 6, function(add) {
+  console.log(add); // 11
+})
+
 function multiplyNums(x, y, cb) {
   // multiplyNums multiplies two numbers and passes the result to the callback.
+  return cb(x * y);
 }
 
+multiplyNums(5, 10, function(prod) {
+  console.log(prod); // 50
+})
+
+multiplyNums(3, 2, function(prod) {
+  console.log(prod); // 6
+})
+
+
+
+
+
+
+
+
+
+
+
 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(item, list);
 }
 
-/* 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 present(item, list) {
+  for(let i = 0; i < list.length; i++) {
+  if (list[i] === item) {
+    return true;
+  }
+ }
+
+ return false;
+
 }
+
+console.log(contains('Pencil', items, present));
+console.log(contains('Gum', items, present));
+console.log(contains('Rando', items, present));
+
+
+
+
+// /* 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.
+// }