callbacks

akusiak23 · akusiak23 · commit 8b1ecb620cb3 · 2018-08-07T15:52:04.000-05:00
diff --git a/assignments/callbacks.js b/assignments/callbacks.js
@@ -2,27 +2,33 @@ const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
 
 function firstItem(arr, cb) {
   // firstItem passes the first item of the given array to the callback function.
+  cb(arr[0]);
 }
 
 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[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 */
@@ -31,4 +37,5 @@ 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.
+  
 }

Original file line number	Diff line number	Diff line change
`@@ -2,27 +2,33 @@ const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];`
`2`	`2`
`3`	`3`	`function firstItem(arr, cb) {`
`4`	`4`	`// firstItem passes the first item of the given array to the callback function.`
	`5`	`+ cb(arr[0]);`
`5`	`6`	`}`
`6`	`7`
`7`	`8`	`function getLength(arr, cb) {`
`8`	`9`	`// getLength passes the length of the array into the callback.`
	`10`	`+ cb(arr.length);`
`9`	`11`	`}`
`10`	`12`
`11`	`13`	`function last(arr, cb) {`
`12`	`14`	`// last passes the last item of the array into the callback.`
	`15`	`+ cb(arr[arr.length-1]);`
`13`	`16`	`}`
`14`	`17`
`15`	`18`	`function sumNums(x, y, cb) {`
`16`	`19`	`// sumNums adds two numbers (x, y) and passes the result to the callback.`
	`20`	`+ cb(x + y);`
`17`	`21`	`}`
`18`	`22`
`19`	`23`	`function multiplyNums(x, y, cb) {`
`20`	`24`	`// multiplyNums multiplies two numbers and passes the result to the callback.`
	`25`	`+ cb(x * y);`
`21`	`26`	`}`
`22`	`27`
`23`	`28`	`function contains(item, list, cb) {`
`24`	`29`	`// contains checks if an item is present inside of the given array/list.`
`25`	`30`	`// Pass true to the callback if it is, otherwise pass false.`
	`31`	`+ cb(list.includes(item));`
`26`	`32`	`}`
`27`	`33`
`28`	`34`	`/* STRETCH PROBLEM */`
`@@ -31,4 +37,5 @@ function removeDuplicates(array, cb) {`
`31`	`37`	`// removeDuplicates removes all duplicate values from the given array.`
`32`	`38`	`// Pass the duplicate free array to the callback function.`
`33`	`39`	`// Do not mutate the original array.`
	`40`	`+`
`34`	`41`	`}`