typescript Build a Facebook Messenger Bot App build a facebook messenger bot from scratch in minutes. Configure answers, questions and other types of replies. This is built using TypeScript, NodeJs, Express
node Authenticating Express React App - Part2 As we discussed in Part 1 on how to do the client side part of the token based authentication in Express React app, this post will focus on server side of the authentication. So lets get started - Exploring the Idea Server side has
node Authenticating Express React App - Part 1 React Apps of any nature will have certain sections that are visible to users who have registered in your app and have logged in. Consider an E-Commerce app, where users can do everything except checkout without being logged in. So how to build such
Javascript JavaScript Call Stack, Event Loop and Callbacks Straight getting into what the title says, a call stack is simply a stack that the javascript run-time maintains to go through all the calls defined in the code. The concept is exactly of a stack where the execution starts from the last function
Javascript Know ES6 Better! I have been working around with ES6 for long time now and I would like to share some interesting things that I found useful in my day to day work life. You will find lots of resources describing new features, but are you really
Javascript Design Patterns in JavaScript - Part 2 Hello folks! A month back I wrote a post explaining how basic fundamental design patterns could be written in JavaScript language. I received few emails of appreciation as well as advice and on one such advice, I am sharing my experience of the current
Javascript Design Patterns in JavaScript Lets look into constructing few of the common design patterns in JavaScript by using Object Oriented Code. We will be discussing one pattern from each of the three common types - Creational - Singleton, Behavioral - Observer and Structural - Decorator pattern. Before getting
Javascript Working with Java Spark Framework Creating a Rest based full stack application requires quite a bit of hands on knowledge of Back end services as well as Front end services. In this post, we are looking on Java micro web framework named Spark. We will build a rest based
Javascript Create and publish your first Node JS package Creating a node.js package and further publishing it for other people to use it is pretty simple process. Through this post I shall walk through the process by creating a small library and publishing it. Before diving into writing the code and creating
Javascript Understanding Linked List With JavaScript As a kid, Learning LinkedList never made sense to me. Statements involving next,null,head etc were just either too difficult or were too mainstream to understand them at first. But growing up, I came to know about the importance, not because I use
Javascript Arbitrary Dimensional Array Have you ever wondered an object greater then 3 Dimensional. Ofcourse, we all know about 2D and 3D Objects but what about 4D or 5D or 6D or 10D. Wikipedia says 4D is Space and Time and anything beyond is imaginary, but you simply
Javascript Iterators in JavaScript ES6 ES6 has come up with a very cool and much needy concept of Iterators. All C++ or Java coders are completely familiar with what are iterators. But, Iterators in JavaScript is something new and needs a little bit of understanding. What are Iterators ? (Definition
Javascript Writing Your First Library in JavaScript Writing a Library in Javascript can be a bit confusing (It was for me atleast when I started learning). It can be confusing because everything in JS is function, so for every particular requirement you can write a function. Having said that, if you
Javascript Full Calendar in BackBone.Js FullCalendar is a jQuery plugin that provides a full-sized, drag & drop event calendar (Almost similar to Google Calendar) and we are gonna built in BackBone App. The concept is very simple, Jquery has a pretty cool plugin named FullCalendar. Here is how the
Javascript Introduction to RxJS First thing first - What is RXJS ? "The Reactive Extensions for JavaScript (RxJS) is a set of libraries for composing asynchronous and event-based programs using observable sequences and fluent query operators that many of you already know by Array#extras in JavaScript. Using RxJS,
Javascript Passing Objects as Argument to Class - JavaScript Few days back, I struggled with a very small concept in JavaScript that required to pass an object of the same class as an argument to it. In doing so, I faced a very genuine issue on how one can pass the object as
C Postfix Calculator Using C & Flex Flex is an aging UNIX utility that helps you write very fast parsers for almost arbitrary file formats. Formally, they implement Look-Ahead-Left-Right (as opposed to "recursive descent") parsing of non-ambiguous context-free (as opposed to "natural language") grammars. Why should you
