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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 »
In Javascript, both the spread and rest operators have the same syntax which is three dots(…) but they differ in their function. The main difference between them is that the spread operator expands the array into multiple elements while the resting operator Condenses them into a single element Merge two arrays using the spread operator Continue Reading »
Abstraction is a process of hiding the internal details of an application from the world and showing only functionality to the user. Example – A man driving a car. The man only knows that applying brakes will stop the car, but he does not know about the inner mechanism of the car or the implementation Continue Reading »
Quite often, a Java Stream or other component needs an object passed thereto to perform some form of calculation or process, but when the method is complete, nothing returns from the tactic. this is often where Java’s functional Consumer interface comes in handy. According to JavaDoc, the patron interface accepts any object style as input. Continue Reading »
Table of contents Definition Conceptual Implementation Java Code & Explanation Applications of DFS Definition Depth First Search (DFS) is an algorithm for traversing Graph Data Structure. The algorithm starts at some arbitrary node in the graph and explores as far as possible along each branch before backtracking. Stack Data structure is needed to keep Continue Reading »
Use Derived Query Methods of Spring Data JPA Repositories instead of writing your own queries. For the simple jpa queries, we generally use @Query annotation to make the queries, but the best practice says that we should use Derived Query Methods instead. Most developers hardly use one or two derived query methods like findById, and Continue Reading »
What is WebSocket? WebSocket provides a way to exchange data between the browser and server via a persistent connection. The data can be passed in both directions as “packets”, without breaking the connection and the need for additional HTTP requests. Where can we use WebSocket? we use WebSocket where we need real-time data sharing Continue Reading »
An array is a linear data structure and collection of items stored at a contiguous memory location. Pairs of square brackets [ ] represent an array and all elements are comma (,) separated. An Array can hold multiple values(elements) of any type i.e (String, Number, Boolean, objects, and even other Arrays ) under a single Continue Reading »
Kotlin Variables are containers for storing data values. The data of variables can be changed and reused depending on conditions. To create a variable we can use var or val, and assign a value to it with an equal sign (=) Variable Declarations Kotlin uses two keywords to declare variables val and var. Example : Continue Reading »
Waterfall Model:- The Waterfall Model was the first Process Model to be launched. It is also called the successive life cycle model. It is very easy to understand and use. In the waterfall model, each phase must be completed before the next phase begins and there is no overlap in stages. The Waterfall model is Continue Reading »
What is Time Complexity? Time Complexity is the time consumed by the algorithm to complete its execution. Time Complexity is measured by summing the time of all the elementary operations. There are many notations to represent the time complexity like:- (1)Big Oh, O (2)Omega, Ω (3)Theta, Θ But, the most commonly used notation for Time Continue Reading »
A Person with another programming background is definitely confused with hoisting in Javascript. So let’s deep dive into the hoisting in javascript The Javascript engine creates the global execution context when we execute a piece of Javascript code. Global Execution Context has two phases : (i) Creation Phase (ii) Execution Phase Definition: During the creation Continue Reading »
When you hear the term software testing, do you think about one particular type of test — such as functional testing or Non Functional testing — or do you immediately start visualization the complex, interconnected web of test types that comprise the broad world of software testing? Most experienced test engineers and developers understand that Continue Reading »
“git add .” : is a command used to add a file that is in the working directory to the staging area. “git commit”: is a command used to add all files that are staged to the local repository. “git push”: is a command used to add all committed files in the local repository to Continue Reading »
The basic aim of the String Handling concept is storing the string data in the main memory (RAM), manipulating the data of the String, retrieving the part of the String, etc. String Handling provides a lot of concepts that can be performed on a string such as concatenation of string, comparison of string, finding the Continue Reading »
In this blog, we will explore the Static and Dynamically typed language. Whenever I come across these two words I am always overwhelmed by these words. So I decided to do some research and share that information as a blog. We will look into the difference between static and dynamically typed language and the similarity Continue Reading »
What are generics in java? Generics is a term that denotes a set of language features related to the definition and use of generics types and methods. Java generics programming is introduced in J2SE 5 to deal with type-safe objects. It makes the code stable by detecting the bugs at compile time. Java generic methods Continue Reading »
Introduction of Recursion and Dynamic Programming: Recursion is the process in which a function calls itself until the base cases are reached. And during the process, complex situations will be traced recursively and become simpler and simpler. The whole structure of the process is tree-like. Recursion does not store any value until reaching the final Continue Reading »
What is Express.js? Express.js is a Node.js framework that is the most popular framework. It is a web application framework that provides you with a single API to build websites, web apps, and the back end. Why do we actually need Express.js? How is it useful for us to use Node.js? Node.js is all about Continue Reading »
Annotations are used to provide metadata about class or method in java and can be used while compiling the program. Annotations were introduced in Java 1.5 version. Before that, we had an XML file for configuration. We write annotations with the ‘@’ sign, for example, @Override annotation. Here ‘@’ sign tells the compiler about the Continue Reading »
Core Java Concepts: Serialization Serialization is defined as the process of converting an object into a sequence of bytes that can persist in a database or can be sent through streams. Serialization saves the state of objects for recreation without having to reprocess them on different platforms. Serialization is useful for storing, Transmitting the state Continue Reading »
The process of placing a list of items in a specified manner is known as Sorting. Some common criteria for sorting are alphabetical and numerical. It can be done in an ascending manner or in descending order. We all know that Collections.sort has the ability in sorting an arrayList for example, alphabetically if they are Continue Reading »
The Destructuring introduced new features of ES6.JavaScript provides a mechanism to handle the array and properties of objects in a much more innovative way. this mechanism is called destructuring. destructuring means implies a complex structure into the simpler parts. Destructuring allows us to extract multiple properties from an object or an Array. It is a Continue Reading »
Well, it has been noticed that all the primitive data types like int, float, double, etc in Java are dealt with differently. Even after the good performance offered by the primitive data types, there are circumstances when we might need an object representation of the primitive data type. Moreover, it has been witnessed that many Continue Reading »
Closures:- One of the greatest features in javascript is closures and it’s widely used but a little bit confusing term of javascript. So let’s understand what is closures. In simple words closures function are gives you access to an outer function from the inner function. We will start the fundamental term lexical scope known as Continue Reading »
Imagine you’re building a UI and you need to connect to an API. When you implement curl calls with the UI, it does not work. You then check the code, and everything seems to be fine. After changing the site or method, it appears that the HTTP call is working. It’s most likely that the Continue Reading »
When we mention common programming languages, it’s necessary to remember Java! Actually, it’s the most common programming language in the world with around seventy lakh Developers using it Regularly. One among the explanations for this can be the versatile nature of Java. Be it desktop apps, mobile apps, or web applications, you name them and Continue Reading »
Java is one of the most powerful programming languages in the software world. Recently, Java 16, the latest version of Java has been released on 16th March 2021. Oracle announced the availability of Java 16 (JDK 16) with 17 new enhancements to the platform. This latest Java Development Kit release comes with language enhancements, new tools, and improved Continue Reading »
Sometimes it’s our application requirement to deal with multiple databases. Spring Boot helps us to configure multiple databases in a single application. This blog will help to configure multiple datasources into a spring boot application. To use multiple DataSources, let’s add the following details in the property file. Here we configured ‘foo’ datasource and ‘bar’ Continue Reading »
Versioning of APIs is a decent practice. Versioning helps make your API more adaptable and versatile to changes while keeping the functionality intact. It also helps you manage changes to the code better and more easily revert back to old code if the new code causes problems. You ought to have an alternate form of Continue Reading »