Completed callbacks.js

sofialevin · sofialevin · commit 90cc0f0b36ba · 2019-05-25T09:48:09.000-07:00
diff --git a/assignments/callbacks.js b/assignments/callbacks.js
@@ -24,28 +24,48 @@ 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);
 }
 
+getLength(items, function(length) {
+  console.log(length);
+})
+
 function last(arr, cb) {
-  // last passes the last item of the array into the callback.
+  return cb(arr[arr.length - 1]);
 }
 
+last(items, function(lastItem) {
+  console.log(lastItem)
+})
+
 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(result) {
+  console.log(result)
+})
+
 function multiplyNums(x, y, cb) {
-  // multiplyNums multiplies two numbers and passes the result to the callback.
+  return cb(x * y);
 }
 
+multiplyNums(3, 5, function (result) {
+  console.log(result);
+})
+
 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++) {
+    return cb(list[i] === item)
+  }
 }
 
+contains("Notebook", items, function(result) {
+  console.log(result);
+})
+
 /* STRETCH PROBLEM */
 
 function removeDuplicates(array, cb) {
