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How to use lifecycle methods in React? Example Tutorial

Components in React are the building blocks of an application. Every component in React has a lifecycle. In simple terms, every component goes through several different phases or events during its lifetime. These phases are -
  • Mounting
  • Updating
  • Unmounting
React provides several in-built methods for each of these phases. These methods are invoked at a certain time during the lifecycle of a component. Such methods are called lifecycle methods. This article will discuss some of the commonly used lifecycle methods in React.

How to find the Longest common prefix in given Array of String in Java? [Solved]

Hello guys, If you are preparing for technical interviews and wondering how to solve the longest common prefix in a given array of String problems in Java then you have come to the right place. Earlier, I have shared 21 String programming problems and one of them was this one. In this article, I am going to show you how to solve this frequently asked coding problem from Java Interviews. It's one of the difficult coding problems and not every programmer I have interviewed has solved this, only a few can solve this so preparing for this one can definitely improve your chances and give you a competitive edge over other candidates.

How to count a number of words in given String in Java? [Solved]

Can you write a method in Java that accepts a String argument and returns a number of words in it? A word is a sequence of one or more non-space characters i.e. any character other than '' (empty String). This should be your method signature:

public int count(String word);

This method should return 1 if the input is "Java" and return 3 if the input is "Java, C++, Python". Similarly a call to wordCount("    ") should return 0. 

How to use String.matches() with Regular Expression in Java? Example Tutorial

String Matching Example in Java
The string matches method in Java can be used to test String against regular expressions in Java. The string matches() method is one of the most convenient ways of checking if a String matches a regular expression in Java or not. Quite often we need to write code that needs to check if String is numeric, Does String contains alphabets e.g. A to Z or a to Z, How to check if String contains a particular digit 6 times, etc. There are so many cases in Java programming where we need a regular expression. 

How to prepare for Google Cloud Machine Learning Engineer Exam in 2022?

Hello guys, if you are preparing for Google Cloud Machine Learning Engineer Certification Exam in 2022 and looking for a guide then you have come to the right place. Earlier, I have shared a guide for the Google Cloud Security Engineer exam, and in this article, I will share my tips, process, and resources to prepare for the Google Cloud Machine Learning Engineer exam. The Professional Machine Learning Engineer certification test is regarded as one of the most difficult GCP certifications because More than one accurate answer is provided for almost every question; nevertheless, just one is considered the best one. 

How to Prepare for Google Cloud Security Engineer Exam in 2022

The world is changing, so does the studying procedure. In today's world, everything is before us, any course, any certificate can be accomplished using a single gadget. But, maximum of us are deluded by assigning unmerited & boring courses, which lack in quality. In the path of this article, I'll be directing you to some splendiferous resources that would help you undoubtedly. To succeed in this target, I've vetted a tracing of tactics. In this plan, I've fractioned the sketch into three parts – accumulating wisdom via courses & books, and evaluating your gained wisdom into practice tests. Let's buckle down into the details of the Google Cloud Security Engineer Exam and analyze this exam, strategies, what it is to pass this exam in 2022. 

How to use @ResponseBody and @RequestBody in Spring MVC and REST ? Examples Tutorial

Hello guys, if you are wondering what is @RequestBody and @ResponseBody annotation in Spring and Spring Boot then you have come to the right place. Earlier, I have told you about the @RestController annotation and in this article, I am going to explain to you what is RequestBody and ResponseBody annotation and when to use them with simple examples. When working with REST API, we may need to bind HTTP requests and response bodies with the domain object. To bind this, we use we can use the @ResponseBody and @RequestBody in Spring. So in this tutorial, we are going to discuss what and when to use the @ResponseBody and @RequestBody in Spring MVC

Top 5 advanced JavaScript function concepts to Learn

Introduction:
A function is a piece or block of code that is created to perform single or multiple tasks. Every major programming language has functions because functions are one of the essential parts of modern programming. JavaScript also supports functions. Over time, JavaScript has upgraded functions in several ways to make them more programmer-friendly. In recent years, more and more advanced concepts are added in JavaScript. In this article, we are going to discuss the advanced working with functions in JavaScript.

How to use Switch Statement and Expression in Java? Tutorial with Examples

Hello friends, welcome aboard to the journey to understand and enjoy Java! We meet once again today to discuss a really interesting topic in Java. But, before we get to the actual topic, let’s talk about a scenario.  Suppose you guys have an integer, which can take up to 5 values, and depending on the value, we perform some tasks. To give you an example, here is a little code on it :


int value;


Now, suppose this int can have up to 5 values associated with it. Let’s say {0, 1, 2, 3, 4}.

For each value, we need to do different processing. 

10 Examples of ArrayList in Java

ArrayList Example in Java
In this Java ArrayList Example, we will see how to add elements in ArrayList, how to remove elements from ArrayList, ArrayList contains Example, and several other ArrayList functions which we use daily. ArrayList is one of the most popular classes from the Java Collection framework along with HashSet and HashMap and a good understanding of the ArrayList class and methods is imperative for Java developers. ArrayList is an implementation of List Collection which is ordered and allows duplicates

Top 8 VS Code extensions to use with React - Best of Lot

Visual Studio Code, commonly known as VS Code is the most popular code editor in the world. VS code supports hundreds of languages and offers a beautiful user interface. It is considered an instantly productive coder editor because of its several features such as syntax highlighting, auto-indentation, snippets, and many more. Most of the React developers prefer using VS Code for React development because of the above-mentioned reasons. Apart from its features, several useful extensions can be installed in VS Code to make React development easier. 

Top 10 Tools for REST API Development and Testing

Hello guys, it's been a long time since I have shared useful tools. Last, I have shared the best tools for Java developers to learn and then the best data visualization tools for Data Scientists to learn. So, today, I am going to write about 10 essential tools for REST API development and Testing. These are the tools that will help you in every stage of your REST-based project like design, development, testing, and documentation. If you are creating REST APIs in Java or any other programming langauge, most of the tools like Postman which are HTTP based are equally useful but a couple of tools are most suitable for Java developers.Without wasting any more of your time, here is my list of 10 useful tools every REST developer should learn

6 Ways to optimize a React application performance

Introduction

Performance is one of the biggest reasons why React.js has gained immense popularity in the last five years. React uses virtual DOM to boost performance. Though React does what it has to do to increase the performance behind the scenes, the developer has to ensure a top-quality user experience. In this article, we will discuss some of the ways which can be used to optimize the performance of a React application.

Understanding "Lifting State Up" in React - Example Tutorial

Introduction

If you have ever worked with React, then you know the importance of state management. The state is managed within the component and decides the component’s behavior. But as the application grows, the state is required to be shared among the different components. For such global state sharing, third-party libraries such as Redux are used.


Apart from managing the state inside a component or using redux for the global state, there is one more way to work with the state. This is called “lifting state up”. In this article, we will discuss what is “lifting state up” in React with the help of an example. 

Higher Order Components in React - Example Tutorial

As a React application grows, it becomes more and more complex. The number of components increases too. With increasing code, you may encounter situations where the same logic is being used in multiple components. Why write the same code everywhere when we can perform code reusability? It is important to understand code reusability and it is recommended to reuse code as much as possible. Higher-Order Components are one such technique. In this article, we will discuss what is Higher-Order Components with the help of a simple example.


5 Best DP-900 Certification Courses and Practice Test for Azure Data Fundamentals Exam

The DP-900 certification, also known as the Microsoft Azure Data Fundamentals Certification, is perfect for people who are just starting to work with data on the cloud. This certification will help you build foundational knowledge in cloud data services with Microsoft Azure. Taking the DP-900 certification exam will have many benefits. It will give you a broad overview of how data works in the cloud. It will also help you test your knowledge of cloud data within the ambit of Microsoft Azure services.

How to Create Custom hooks in React.js? Example Tutorial

Introduction

The introduction of React hooks in React version 16.8 changed the React development completely. The web application development using React was mostly limited to class components because the state and lifecycle methods were not supported in the functional components. But with React hooks, the state can be used in functional components. Moreover, lifecycle methods like functionality can also be achieved using the useEffect hook. 

How to do Type checking in React using PropTypes? Example Tutorial

In React, data can be passed from a parent component to a child component as props. Props are the properties that contain immutable read-only data. A prop value is basically an object which can hold any number of values of different data types. Props are an essential part of a React application. If not handled properly, props can lead to potential bugs and conflicts. The main issue is the data type of the value that is being passed from one component to another. React provides type checking support that is very useful in such cases. In this article, we will discuss how to use type checking in React with the help of PropTypes. 

How to use React forms in JSX? Example Tutorial

Introduction

Forms are an essential part of web application development. You can find forms on almost every website you visit. Forms are important because they are used to handle input from the users. Websites will not function properly if there is no way for input handling. 


Input can be taken in various forms. The most common type of input is text input. Other forms of input are checkboxes, radio buttons, and ranges. 


In React, forms are created like they are created in HTML. The most important part of forms in React is handling them. In this article, we will discuss how to create forms in React and handle them. 

How to use "styled-components" in React? Example Tutorial

Introduction

Today, no website is complete without CSS. The user experience is heavily dependent on the CSS applied to the website. Without CSS, the website will look extremely unpleasant. So to make a website attractive and user-friendly, it is necessary to apply top-notch CSS. 


Since its introduction in 1996, CSS has changed a lot. Over time CSS has undergone many changes and lots of new features are added to it. Moreover, to make the developer comfortable, CSS frameworks, libraries, and tools are invented. One such tool is styled-components and in this article, we will discuss what are styled-components and how to use them in React. 

What is context API in React? Example Tutorial

Introduction
Props and state are essential parts of a React component. While the state is controlled within the component, props are passed to it from the parent component. In a huge React application, a global state is generally created to pass the data around. Through props can also be used to pass data around multiple components but that can lead to unwanted situations. To avoid such unwanted situations, React provides the Context API. In this article, we will discuss what Context API is and how (and why) it is used.