Merge pull request #45 from christianbender/changed_stack

wrote prototype notation

Data Structures/Stack/Stack.js

@@ -7,21 +7,22 @@
 
 // Functions: push, pop, peek, view, length
 
-//Creates a stack
+//Creates a stack constructor
 var Stack = function () {
   //The top of the Stack
   this.top=0;
   //The array representation of the stack
-  this.stack = {};
+  this.stack = new Array();
+}
 
   //Adds a value onto the end of the stack
-  this.push=function(value) {
+  Stack.prototype.push=function(value) {
     this.stack[this.top]=value;
     this.top++;
   }
 
   //Removes and returns the value at the end of the stack
-  this.pop = function(){
+  Stack.prototype.pop = function(){
     if(this.top === 0){
       return "Stack is Empty";
     }
@@ -33,21 +34,20 @@ var Stack = function () {
   }
 
   //Returns the size of the stack
-  this.size = function(){
+  Stack.prototype.size = function(){
     return this.top;
   }
 
   //Returns the value at the end of the stack
-  this.peek = function(){
+  Stack.prototype.peek = function(){
     return this.stack[this.top-1];
   }
 
   //To see all the elements in the stack
-  this.view= function(){
+  Stack.prototype.view= function(){
     for(var i=0;i<this.top;i++)
       console.log(this.stack[i]);
   }
-}
 
 //Implementation
 var myStack = new Stack();