Javascript - Prashant Bansal

Prashant Bansal

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Javascript

All the posts written for Javascript

async generators

Async Generators, the superior async await

An async generator is a special way for computers to do things that take time, such as getting information from the internet. Lets take a deeper dive into it from a real world example. Imagine you're at a magical bakery, and you're trying to bake a

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

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 entering the stack and goes on

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 willing to accept all the syntax!

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 patterns which actually align with your

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 to code, lets see what is

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 system where we can do stuff

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 the package, make sure you have

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 LinkedList while programming, but because it

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 cannot imagine 4D and above object.

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 from Cplusplus.com) An iterator is

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 are writing a function which serves

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 calendar looks like when added succesfully

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, developers represent asynchronous data streams

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 argument where as the argument is