SOCKET IO

Socket.IO is a library that enables bidirectional and event-based communication between clients and servers. Installation: Open Cmd and run the command given below: npm install socket.io-client   Import: import * as io from ‘socket.io-client’;   Connection: From same domain    From different domain   In case of different domains, please make sure to enable Cross-Origin Continue Reading »

Applet in Java

 Java applets are small programs that run on a web browser to perform a specific task. They were introduced with the release of the first version of Java in 1995 and quickly became popular for their ability to add dynamic content to web pages. Applets are essentially mini-programs that are written in Java and run Continue Reading »

COALESCE() function in Structured Query Language 

The Meaning of Coalesce is to come together to form one larger group, substance, etc.  In SQL, the COALESCE() function is a powerful tool used to handle NULL values in queries. The function takes multiple arguments and returns the first non-NULL value. This function is extremely useful when dealing with NULL values in database tables.  Continue Reading »

Java Predicate

Java Predicate is a functional interface that is part of Java.util.function package. It was introduced in Java 8. It represents a single argument function that returns a boolean value. A Predicate takes an input and returns either true or false, depending on the condition that is specified in the function. Using predicate to check if Continue Reading »

Memoization in Javascript

Memoization is a powerful technique used in computer science to optimize the performance of functions that are called repeatedly with the same arguments. In JavaScript, memoization is particularly useful for expensive computations that involve complex algorithms or data structures. At its core, memoization involves caching the result of a function based on its input arguments. Continue Reading »

Difference pass by reference or pass by value

Before discussing into JavaScript pass-by-reference or pass-by-value function, it is known about the difference between primitive and non-primitive. Primitive Values: – Data Types string, number, null, undefined, symbols, and Boolean are primitive values. Primitive values are passed by value in JavaScript. Non Primitive Values: – object, array, and function are non-primitive values. All objects and Continue Reading »

Java 11 feature and Comparison

Oracle provides new Java versions every six months. Even before it was launched, the September Java 11 version created quite a stir in the computer science industry by announcing that commercial usage of Java would subsequently be charged. The following articles will highlight major JDK 11 features, advancements, and deprecated functionality. Important Changes and Information: Continue Reading »

Performance tuning in Java 

Performance tuning is an essential aspect of software development, especially in enterprise-level applications where performance plays a significant role in user satisfaction and system stability. Java, being a popular programming language for enterprise-level applications, provides many tools and techniques for performance tuning. In this blog, we will discuss performance tuning in Java and the best Continue Reading »

Cucumber: BDD Testing & Collaboration Tools for Teams

Cucumber is a tool that facilitates Behavior-Driven Development (BDD) testing and collaboration among team members. It allows teams to write high-level tests in natural language, which can be understood by both technical and non-technical stakeholders. This blog post will provide an overview of Cucumber, its key features, and how it can benefit teams. What is Continue Reading »

Navigating the Data Lake: Insights from Building and Utilizing Data Lakes

Introduction As someone who has hands-on experience in constructing and leveraging data lakes, I can attest to the transformative power these repositories hold for organizations grappling with vast amounts of data. In this article, I will share practical insights and technologies utilized in building and harnessing the potential of data lakes. Demystifying Data Lakes Data Continue Reading »

Code coverage tools

Code coverage tools are software programs that measure the extent to which a software application’s source code is tested by a test suite. These tools analyze the source code of an application and determine which lines of code are executed during testing and which lines are not. Here are some popular code coverage tools: JaCoCo: Continue Reading »

Ruby on Rails

What is Rails? Rails is a web application development framework written in the Ruby programming language. It aims to simplify web application programming by assuming what every developer needs to get started. It allows you to write less code and do more than many other languages ​​and frameworks. Experienced Rails developers also report that it Continue Reading »

Role of equal() and hashCode Methods()

In Java, HashMap is a widely used data structure that stores elements in key-value pairs. It provides constant-time performance for basic operations like adding, removing, and accessing elements. The implementation of HashMap relies heavily on the equals and hashCode methods, which are used to ensure the uniqueness of keys and the efficiency of lookup operations. Continue Reading »

Generating Java Code from Open API

Introduction:-  Open API (open application programming interface) Open API Generator can generate code based on an Open API yaml specification. We can generate request models, response models, and controllers of API. Following are the steps to create java code from Open API:- Step 1:-Create a yaml file for your API By using this Swagger.io, below Continue Reading »

Closure in Javascript

As per the definition of Javascript Developer, Closure is defined as the combination of a function bundled together (enclosed) with references to its surrounding state (the lexical environment). But what is meant by the terms “enclosed”, “surrounding state“, and lexical environment? No need to worry, we’ll discuss their terms and closure in this article with Continue Reading »

Liquibase

How Liquibase Works? Liquibase is used to track database changes. It is an Open Source Library. We all have worked in systems where the typical database change operation process was to write DDL, and DML scripts in SQL lines which were source-controlled, and database changes were executed by the developer or by some other team. Continue Reading »

Carina Framework

Carina Open Source Testing Tools : Carina is a Java-based test automation framework that unites all testing layers: Mobile applications (web, native, hybrid), WEB applications, REST services, and Databases. Pros ● Carina Framework is built on top of the most popular open-source solutions like Selenium, Appium, and TestNG allowing to reduce dependence on the specific Continue Reading »

Java 8 Features

 Figure 1:Features of Java 8 JAVA 8 is one of the major feature releases of “JAVA programming language” development. It is one of the revolutionary releases of the development of software platforms. The initial version of Java 8 was released on 18 March 2014. It is responsible for upgrading Java programming,  tools, JVM, and libraries. Continue Reading »