Merge remote-tracking branch 'refs/remotes/buckyroberts/master'

RKALM · RKALM · commit ef511ad679b5 · 2016-07-08T04:05:54.000+02:00
diff --git a/Data_Structures/Stacks/README.md b/Data_Structures/Stacks/README.md
@@ -1,8 +1,8 @@
 # Stacks
 
-A stack is a basic data structure that can be logically thought as linear structure represented by a real physical
-stack or pile, a structure where insertion and deletion of items takes place at one end called top of the stack. The
-basic concept can be illustrated by thinking of your data set as a stack of plates or books where you can only take the
-top item off the stack in order to remove things from it.
+A stack is a data structure that can be logically thought of as a real physical stack or pile, a structure where
+insertion and deletion of items takes place at one end only called the "top" of the stack. The basic concept can be
+illustrated by thinking of your data set as a stack of plates or books where you can only take the top item off the
+stack in order to remove things from it.
 
 ![](http://i.imgur.com/dax54C9.jpg)
diff --git a/Data_Structures/Stacks/main.js b/Data_Structures/Stacks/main.js
@@ -3,7 +3,7 @@
 function Stack() {
     let items = [];
 
-    // remove all items in the stack
+    // remove all items
     this.clear = function () {
         items = [];
     };
@@ -13,25 +13,30 @@ function Stack() {
         return items.length == 0;
     };
 
-    // return last item added to stack
+    // return last item added
     this.peek = function () {
         return items[items.length - 1];
     };
 
+    // remove last item from end
+    this.pop = function () {
+        return items.pop();
+    };
+
     // display all items
     this.print = function () {
         console.log(items.toString());
     };
 
-    // add item to end of stack
+    // add item to end
     this.push = function (element) {
         items.push(element);
     };
 
-    // remove last item from stack
-    this.pop = function () {
-        return items.pop();
-    }
+    // get size of stack
+    this.size = function () {
+        return items.length;
+    };
 
 }
 
@@ -42,7 +47,11 @@ buckysStack.push(87);
 buckysStack.push(29);
 buckysStack.push(71);
 buckysStack.print();
+
+console.log('--------------------');
+
 console.log(buckysStack.peek());
+console.log(buckysStack.size());
 
 console.log('--------------------');
 
diff --git a/README.md b/README.md
@@ -1,4 +1,4 @@
-![](http://i.imgur.com/BgUMUGU.png)
+![](http://i.imgur.com/jVYUayw.png)
 
 # Course Outlines
 
@@ -46,6 +46,8 @@ Teach existing JavaScript data structures such as arrays, sets, and maps. Also t
 
 ## ES6 Features
 
+[Watch Video Tutorials](https://www.youtube.com/watch?v=ZJZfIw3P8No&index=1&list=PL6gx4Cwl9DGBhgcpA8eTYYWg7im72LgLt)
+
 Overview of all the new features, syntax, and changes in ES6.
 
 - let
@@ -58,8 +60,18 @@ Overview of all the new features, syntax, and changes in ES6.
 
 ***
 
-### Using ES6
+## Using ES6
 
 To enable ES6 support in any JetBrains IDE *(such as WebStorm)*:
 - File > Settings > Languages & Frameworks > JavaScript
 - Select EMCAScript 6
+
+
+## Links
+
+- [Support](https://www.patreon.com/thenewboston)
+- [thenewboston.com](https://thenewboston.com/)
+- [Facebook](https://www.facebook.com/TheNewBoston-464114846956315/)
+- [Twitter](https://twitter.com/bucky_roberts)
+- [Google+](https://plus.google.com/+BuckyRoberts)
+- [reddit](https://www.reddit.com/r/thenewboston/)
