complete callbacks.js challenge

Jobsy · Jobsy · commit a44280f739c6 · 2019-08-21T03:28:28.000+01:00
diff --git a/assignments/callbacks.js b/assignments/callbacks.js
@@ -41,23 +41,28 @@ const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
 
 function getLength(arr, cb) {
   // getLength passes the length of the array into the callback.
+  cb(arr.length);
 }
 
 function last(arr, cb) {
   // last passes the last item of the array into the callback.
+  cb(arr.length - 1);
 }
 
 function sumNums(x, y, cb) {
   // sumNums adds two numbers (x, y) and passes the result to the callback.
+  cb(x + y);
 }
 
 function multiplyNums(x, y, cb) {
   // multiplyNums multiplies two numbers and passes the result to the callback.
+  cb(x * y);
 }
 
 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.
+  cb(list.includes(item));
 }
 
 /* STRETCH PROBLEM */

Original file line number	Diff line number	Diff line change
`@@ -41,23 +41,28 @@ const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];`
`41`	`41`
`42`	`42`	`function getLength(arr, cb) {`
`43`	`43`	`// getLength passes the length of the array into the callback.`
	`44`	`+ cb(arr.length);`
`44`	`45`	`}`
`45`	`46`
`46`	`47`	`function last(arr, cb) {`
`47`	`48`	`// last passes the last item of the array into the callback.`
	`49`	`+ cb(arr.length - 1);`
`48`	`50`	`}`
`49`	`51`
`50`	`52`	`function sumNums(x, y, cb) {`
`51`	`53`	`// sumNums adds two numbers (x, y) and passes the result to the callback.`
	`54`	`+ cb(x + y);`
`52`	`55`	`}`
`53`	`56`
`54`	`57`	`function multiplyNums(x, y, cb) {`
`55`	`58`	`// multiplyNums multiplies two numbers and passes the result to the callback.`
	`59`	`+ cb(x * y);`
`56`	`60`	`}`
`57`	`61`
`58`	`62`	`function contains(item, list, cb) {`
`59`	`63`	`// contains checks if an item is present inside of the given array/list.`
`60`	`64`	`// Pass true to the callback if it is, otherwise pass false.`
	`65`	`+ cb(list.includes(item));`
`61`	`66`	`}`
`62`	`67`
`63`	`68`	`/* STRETCH PROBLEM */`