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Writing Upgradable Smart Contracts in Solidity
As you must be aware that smart contracts are immutable programs that run exactly as programmed without any third party interface. Smart contracts cannot be modified once they are deployed which is actually a feature of smart contracts but in some blockchain use-cases it may be needed to change the smart contracts interfaces and/or their […]
Pointing Domain to AWS Elastic Load Balancing
Amazon ELB is an auto scalable load balancer that sits in front of EC2 instances and distributes traffic between them. Client communicates with ELB not with EC2 instances directly. When you create a ELB you get a domain name provided by Amazon AWS to make requests to the ELB. This domain name resolves to different […]
Express.js Middleware Tutorial
Developers who are new to Express often get confused with the difference between route handler and middleware. Therefore they also get confused with the difference between app.use(), app.all(), app.get(), app.post(), app.delete() and app.put() methods. In this tutorial I will explain the exact difference between a middleware and route handler. And also how to use the […]
Streaming File Uploads to Storage Server with Node.js
In this tutorial I will show how to stream a file uploaded by user to a file storage server(such as Amazon S3 or any other custom server) without storing file in a temporary directory. The advantage of this is that in case there is a lot of parallel uploads of large files then it prevents […]
Twitter Login in Intel XDK APP using ngCordovaOauth
This post is a part 51 of Intel XDK Complete Tutorial post series. Twitter Login is a form of single sign-on using existing login information from Twitter by creating a new login account if doesn’t already exist specifically for that website. It is designed to simplify logins for end users. In this tutorial I will […]
WordPress Custom PHP, JS and CSS Plugin
This post is a part 6 of Premium WordPress Plugins post series. This plugin lets you add custom CSS, JS and PHP code to your WordPress site without any hassles. This is an easy-to-use WordPress Plugin to add custom CSS styles, JS code and new WordPress functionality using PHP that override Plugin and Theme default […]
Create a Chat App using Intel XDK and XMPP
This post is a part 49 of Intel XDK Complete Tutorial post series. Chat apps are becoming very popular among users. Learning the overall architecture of a chat app is important for developers. In this tutorial I will show you how to create a chat app using Intel XDK. All the codes and technologies of […]
Exit-Intent using JavaScript
Exit-Intent technology has been one of the most successful Internet marketing techniques. Websites use this technology to increase subscribers, sell products, social media followers etc. In this tutorial I will tell you what it is and how exactly it works. And also how to integrate this technology in your own website. What is Exit-Intent Technology? […]
Creating JavaScript Modules
This post is a part 17 of ECMAScript 6 Complete Tutorial post series. In nutshell JavaScript modules are just a way of packaging related JavaScript code in its own scope which can be consumed by other JavaScript programs. In this tutorial I will show the different ways to create JavaScript modules. Immediately-Invoked Function Expression IIFE […]
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