Angular 2 – Async Validator – Username/email availability check

In this post I will show you, how we can create custom async validator to check for email availability, same logic you can apply for username or other async validations. Lets create a component:


Design pattern – Chain of Responsibility

Design patterns are very general/non specific reusable solutions or templates to solve a specific design problems in software design. Which defines how the specific classes or code blocks can interact or relate to each […]

Encrypt and Decrypt files using PHP

In my recent project I have implemented PDF file encryption and decryption. In this project, data is very sensitive so to protect files from unauthorized access and to keep them safe and secure we have used file based […] Protection Status