Ansible is a radically simple IT automation engine that automates cloud provisioning, configuration management, application deployment, intra-service orchestration, and many other IT needs.

Designed for multi-tier deployments since day one, Ansible models your IT infrastructure by describing how all of your systems inter-relate, rather than just managing one system at…


Docker provides different ways to inject the dynamic values during the build phase and the run phase. we can use Docker build arguments to dynamically injecting the values at the build time and environment variable to inject values at run time and can combine both to maximize their benefit.

Docker build arguments

It…


A Regular Expression (or Regex) is a pattern (or filter) that describes a set of strings that matches the pattern.

Regular expressions are used to search strings for a specific pattern or to validate the user-input value like to validate the email address entered by the user.

Colosseum, Rome, Italy

Why we use Regular Expression?

To perform a…


Docker-compose is a tool for defining and running multi-container Docker applications. With Compose, you use a YAML file to configure your application’s services. Then, with a single command, you create and start all the services from your configuration.

Why Docker-compose?

Let say we want to containerize an application having Node backend, React-js…


Java 9 Features

- Immutable List

Creates a immutable list (read-only), cannot modify the list once it is created.

List.of(1,2,3);
  • Cannot add null value, it will throw NullPointerException.
  • Cannot add more values to the list, it will throw UnsupportedOperationException.
  • Can add values only at the time of initialization.

- Immutable Set

Set.of(1,2,3);
  • Cannot add duplicate values like Set.of(1,1,2), it…


Collectors is a final class that extends the Object class. It provides reduction operations, such as accumulating elements into collections, summarizing elements according to various criteria, etc. Java Collectors class provides various methods to deal with elements.

1. Creating list: toList()

It is used to accumulate elements into a list. It will create a…


Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency.

If you are working on any software project, then there are good chances that you already heard of GIT before. …


In this blog, we will learn about how we can containerize a react application. Here we will see the generic steps which we can follow with any react application. …


Docker provides the ability to package and run an application in a loosely isolated environment called a container. The isolation and security allow you to run many containers simultaneously on a given host.

What are a docker image and docker container?

As per the official website, a Docker container image is a lightweight, standalone, executable package of software…


As ECMAScript11 came, let’s quickly revise all the major features of ES6 to ES10.

ECMAScript6 -ECMAScript 2015

Its the protocol on which Javascript works. So we can say its javascript version.

Features introduced in EC6

let keyword

The let statement allows us to declare a variable with block scope and we cannot redeclare the same object in the same…

Rohan Aggarwal

Full stack developer

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