Done task 1 and 2

Tom Tarpey · Tom Tarpey · commit c19e4ec3b6be · 2018-08-07T19:38:31.000+01:00
diff --git a/assignments/callbacks.js b/assignments/callbacks.js
@@ -2,31 +2,64 @@ 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]);
 }
 
 function getLength(arr, cb) {
   // getLength passes the length of the array into the callback.
+  return cb(arr.length);
 }
 
 function last(arr, cb) {
   // last passes the last item of the array into the callback.
+  return cb(arr[arr.length - 1]);
 }
 
 function sumNums(x, y, cb) {
   // sumNums adds two numbers (x, y) and passes the result to the callback.
+  return cb(x + y);
 }
 
 function multiplyNums(x, y, cb) {
   // multiplyNums multiplies two numbers and passes the result to the callback.
+  return cb(x * y);
 }
 
+// testing 
+// -- 1 --
+firstItem(items, (item) => {
+  console.log(item)
+}); // --> Pencil
+
+// -- 2 --
+getLength(items, (length) => {
+  console.log(length);
+}); // --> 4
+
+// -- 3 -- 
+last(items, (item) => {
+  console.log(item);
+}); // --> Gum
+
+// -- 4 --
+sumNums(4, 6, (result) => {
+  console.log(result);
+}); // --> 10
+
+// -- 5 --
+multiplyNums(4, 6, (result) => {
+  console.log(result);
+}); // --> 24
+
+
+
+/* STRETCH PROBLEM */
+
 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.
 }
 
-/* STRETCH PROBLEM */
-
 function removeDuplicates(array, cb) {
   // removeDuplicates removes all duplicate values from the given array.
   // Pass the duplicate free array to the callback function.
