working on callbacks

JulesPL · JulesPL · commit d6e4a37b2343 · 2019-06-28T22:15:46.000-04:00
diff --git a/assignments/callbacks.js b/assignments/callbacks.js
@@ -2,7 +2,7 @@
 
 const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
 
-/* 
+
 
   //Given this problem: 
   
@@ -13,6 +13,7 @@ const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
   // Potential Solution:
 
   // Higher order function using "cb" as the call back
+  
   function firstItem(arr, cb) {
     return cb(arr[0]);
   }
@@ -22,16 +23,39 @@ const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
     console.log(first)
   });
 
-*/
+//
 
+  function getLength(arr, cb) {
+    // getLength passes the length of the array into the callback.
+  }
 
-function getLength(arr, cb) {
-  // getLength passes the length of the array into the callback.
-}
+  function getLength(arr, cb) {
+    return cb(arr.length);
+  }
 
-function last(arr, cb) {
-  // last passes the last item of the array into the callback.
-}
+  getLength(items, function(length) {
+    console.log(length)
+  });
+
+
+
+//
+
+  function last(arr, cb) {
+    // last passes the last item of the array into the callback.
+  }
+
+  function last(arr, cb) {
+    return cb(arr[arr.length-1]);
+  }
+
+
+  last(items, function(anything){
+    console.log(anything)
+  });
+
+
+//
 
 function sumNums(x, y, cb) {
   // sumNums adds two numbers (x, y) and passes the result to the callback.
