Completed Project 4

JoshuaGoode · JoshuaGoode · commit 19ddbd0214c1 · 2018-02-19T16:23:56.000-05:00
diff --git a/src/project-4.js b/src/project-4.js
@@ -1,31 +1,44 @@
 const getFirstItem = (collection, cb) => {
   // invoke the callback function and pass the first item from the collection in as an argument
+  cb(collection[0]);
 };
 
 const getLength = (collection, cb) => {
   // Write a function called getLength that passes the length of the array into the callback
+  cb(collection.length);
 };
 
 const getLastItem = (collection, cb) => {
   // Write a function called getLastItem which passes the getLastItem item of the array into the callback
+  cb(collection[collection.length - 1]);
 };
 
 const sumNums = (x, y, cb) => {
   // Write a function called sumNums that adds two numbers and passes the result to the callback
+  cb(x + y);
 };
 
 const multiplyNums = (x, y, cb) => {
   // Write a function called multiplyNums that multiplies two numbers and passes the result to the callback
+  cb(x * y);
 };
 
 const contains = (collection, item, cb) => {
   // Write a function called contains that checks if an item is present inside of the given array.
   // Pass true to the callback if it is, otherwise pass false
+  cb(collection.includes(item));
 };
 
 const removeDuplicates = (collection, cb) => {
   // Write a function called removeDuplicates that removes all duplicate values from the given array.
   // Pass the array to the callback function.  Do not mutate the original array.
+  const arr = [];
+  for (let i = 0; i < collection.length; i++) {
+    if (!arr.includes(collection[i])) {
+      arr.push(collection[i]);
+    }
+  }
+  cb(arr);
 };
 
 module.exports = {
