complete callbacks.js

mparedes003 · mparedes003 · commit 8193a442ae2f · 2018-08-07T14:02:22.000-07:00
diff --git a/assignments/callbacks.js b/assignments/callbacks.js
@@ -2,30 +2,69 @@ 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);
 }
 
+function first(items) {
+  console.log(items[0]);
+} 
+
+firstItem(items, first);
+
 function getLength(arr, cb) {
   // getLength passes the length of the array into the callback.
+  return (cb(arr));
 }
 
-function last(arr, cb) {
-  // last passes the last item of the array into the callback.
-}
+function arrLength(items) {
+   console.log(items.length);
+} 
 
-function sumNums(x, y, cb) {
-  // sumNums adds two numbers (x, y) and passes the result to the callback.
-}
+  getLength(items, arrLength);
+
+
+  function last(arr, cb) {
+    // last passes the last item of the array into the callback.
+    return (cb(arr));
+  }
+  
+  function lastItem(items) {
+    console.log(items.pop());
+  
+  }
+  
+  last(items, lastItem);
+
+  function sumNums(x, y, cb) {
+    // sumNums adds two numbers (x, y) and passes the result to the callback.
+    return cb(x, y);
+  }
+  
+  function add(x, y) {
+    console.log(x + y);
+  }
+  
+  sumNums(6,8,add);
 
 function multiplyNums(x, y, cb) {
   // multiplyNums multiplies two numbers and passes the result to the callback.
+  return cb(x, y);
+}
+
+function multiply(x,y) {
+  console.log(x * y);
 }
 
+multiplyNums(33,25, multiply);
+
+
+/* STRETCH PROBLEMS */
+
 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.
