complete challenge on callback

anu-001 · anu-001 · commit f2018ab8d3b2 · 2019-05-07T13:59:44.000+01:00
diff --git a/assignments/array-methods.js b/assignments/array-methods.js
@@ -57,7 +57,7 @@ const runners = [{"id":1,"first_name":"Charmain","last_name":"Seiler","email":"c
 // The event director needs both the first and last names of each runner for their running bibs.  Combine both the first and last names into a new array called fullName. 
 let fullName = [];
 runners.forEach(function (runner) {
-    fullName.push(`fist_name: ${runner.first_name}, last_name: ${runner.last_name} `)
+    fullName.push(`${runner.first_name} ${runner.last_name} `)
 });
 console.log(fullName);
 
diff --git a/assignments/callbacks.js b/assignments/callbacks.js
@@ -1,6 +1,6 @@
 // Create a higher order function and invoke the callback function to test your work. You have been provided an example of a problem and a solution to see how this works with our items array.  Study both the problem and the solution to figure out the rest of the problems.
 
-const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
+const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum', 'Gum'];
 
 /* 
 
@@ -24,32 +24,51 @@ const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
 
 */
 
+ // Function invocation 
+  const cb = (first) => {
+    console.log(first)
+  };
+
+
 
 function getLength(arr, cb) {
-  // getLength passes the length of the array into the callback.
+  return cb(arr.length);
 }
+getLength(items, cb);
 
 function last(arr, cb) {
-  // last passes the last item of the array into the callback.
+  return cb(arr[arr.length - 1]);
 }
+last(items,cb);
 
 function sumNums(x, y, cb) {
   // sumNums adds two numbers (x, y) and passes the result to the callback.
+  return  cb(x + y);
 }
+sumNums(11,25, cb);
 
 function multiplyNums(x, y, cb) {
   // multiplyNums multiplies two numbers and passes the result to the callback.
+  return  cb(x * y);
 }
 
+multiplyNums(11, 25, cb);
+
 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));
 }
 
+contains("Notebook", items, cb);
 /* STRETCH PROBLEM */
 
 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.
+  cb(array.filter((item, index) => {
+    return array.indexOf(item) >= index;
+  }))
 }
+removeDuplicates(items, cb);
