Tristan Linehan/ JavaScript-II / callbacks.js

tlinehan · tlinehan · commit 516dda783c29 · 2018-05-22T14:12:41.000-07:00
diff --git a/assignments/callbacks.js b/assignments/callbacks.js
@@ -2,33 +2,57 @@ 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[0]);
 }
 
 function getLength(arr, cb) {
   // getLength passes the length of the array into the callback.
+  return cb(arr.length);
 }
 
 function last(arr, cb) {
   // last passes the last item of the array into the callback.
+  return cb(arr[arr.length-1]);
 }
 
 function sumNums(x, y, cb) {
   // sumNums adds two numbers (x, y) and passes the result to the callback.
+  return cb(x+y);
 }
 
 function multiplyNums(x, y, cb) {
   // multiplyNums multiplies two numbers and passes the result to the callback.
+  return 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.
+  if (list.includes(item)){
+    return cb(true);
+  }else{
+    return cb(false);
+  }
 }
 
 /* STRETCH PROBLEM */
-
-function removeDuplicates(array, cb) {
+// const myarray = ['hey','hey','yo'];
+// let newArr = [];
+function removeDuplicates(myarray, 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.
+  
+  //creates copy of array
+  // newArr = myarray.slice(0);
+  // console.log(newArr);
+
+  //reduce
+  
+
+
 }
+
+// console.log(newArr);
+// removeDuplicates(myarray);
+
