finished firstItem

ryan-hamblin · ryan-hamblin · commit d9c965fbb123 · 2017-11-06T12:48:58.000-07:00
diff --git a/src/callbacks.js b/src/callbacks.js
@@ -2,6 +2,7 @@
 
 const firstItem = (arr, cb) => {
   // firstItem passes the first item of the given array to the callback function.
+  cb(arr[0]);
 };
 
 const getLength = (arr, cb) => {
