Monday, February 28, 2022

How to use Context and useReducer for state management in React app? Example Tutorial

Introduction
A React component is made up of props and state. The state can be local or global. Usually, the local state is handled within the component using the setState method in class components and hooks in the functional components. But as the application grows, the state is usually required to be shared among multiple components. The global state is managed using third-party libraries such as Redux

Redux works perfectly but setting up redux is complicated and working with it is more complicated. So for moderate global state management, we can use Context API or the useReducer hook. But, there is one more way for managing the global state and that is by using the Context API and useReducer together.

Friday, February 25, 2022

What is "render props" in React.js? Example Tutorial

Props in React are properties that are passed from a parent component to a child component. Basically, props are plain JavaScript objects. Unlike the state, which is managed within the component, props are received as input from another component. As mentioned, props are JavaScript objects. But props are not limited to this only. There is another way of using props and it is known as “render props”. In this article, we will discuss what “render props” are and how to use this technique in React with the help of examples.

Friday, February 18, 2022

Top 5 Courses to learn UML for Software Design and Development in 2024 - Best of Lot

Hello friends, we are here again today for another exciting topic to discuss. But, today we are not gonna discuss something which is related to Java or any other language or spring boot. Today we are gonna discuss something which is immensely practical and very important skill if you want to grow as programmer and become a tech lead or Software architecture. Yes, you guessed it right, today we are going to talk about UML (Unified Modeling Language). Modeling is a process to communicate your design which is in your mind to other people in your team like developers, architect via diagram. This is one of the most important skill if you want to become Software architect in 2024

Wednesday, February 16, 2022

Top 6 Courses to Learn Neural Networks and Deep Learning in 2024 - Best of Lot

Hello folks, if you are looking for the best online courses to learn Deep Learning and Neural networks in 2024 then you have come to the right place.  In the past, I have shared the best Data Science courses, best Data Science websites, and best Machine Learning courses, and in this article, I am going to share the best online courses to learn Data Science and Machine Learning for Beginners. I have hoped a lot of online platforms and websites to find deep learning courses which not only cover essential concepts but also cover them in a way that can be easily understood, but most of the courses fall short of it. Some courses have great content they cover every possible concept but they are very hard to understand, and in some courses where you have engaging and easy to understand content then they shy away from covering advanced topics. 

Monday, February 14, 2022

Top 6 Blockchain Courses and Certifications for Beginners in 2024 - Best of Lot

Hello guys, If you're involved in the cryptocurrency space, then you've probably heard about Blockchain. Unless you're living under a rock . I'm talking about this new technology that offers what cryptocurrencies were most dangerous about… safety. With Blockchain, transaction safety is a must every time. Big companies invest big stacks of money in finding experts in this field. A blockchain expert's salary can go as high as $150,000 per year. So yeah, if you were thinking of learning about Blockchain, this is the right time to do so.

Top 5 Online Courses to Learn MySQL Database in 2024 - Best of Lot

Hello guys, if you want to learn MySQL and SQL in 2024 and looking for the best resources like online courses, tutorials, and books then you have come to the right place. Earlier, I have shared the best SQL courses, books, and SQL interview questions and today, I am going to share the best online courses to learn MySQL in 2024. As you most probably know, MySQL is one of the big players in the Big Data technological ecosystem. It is one of the most popular databases in the world and has wide-ranging capabilities. It is used in a wide variety of industries, and so every half-decent programmer should at least have a basic understanding of MySQL.

Sunday, February 13, 2022

Top 20 Hibernate Interview Questions with Answers for Java Programmers

Hibernate is one of the most popular persistent frameworks in the Java world. Hibernate offers an object to relational (ORM) solution which frees Java developers from writing tedious, hard to read, and cluttered JDBC code converting SQL columns into Object properties. Apart from freeing Java developers from writing JDBC and database interaction code, Hibernate also offers the out-of-box solution on caching, proxying, and lazy loading which drastically improves the performance of your Java Web application. 

Saturday, February 12, 2022

How to Parse JSON in Java Object using Jackson - Example Tutorial

Hello guys, if you are wondering how to parse JSON in Java then don't worry, there are many options. In the last article, I have shown you 3 ways to parse JSON in Java in this example, You will learn how to parse a  JSON String to Java and how to convert Java Object to JSON format using Jackson. JSON stands for JavaScript Object notation is a subset of JavaScript object syntax, which allows all JavaScript clients to process it without using any external library. Because of its compact size, compared to XML and platform independence nature makes JSON a favorite format for transferring data via HTTP. 

Friday, February 11, 2022

How to use useReducer in React.js and JavaScript? Example Tutorial

Introduction

Before the React hooks were introduced, it was not possible to use state in functional components. The React hooks transformed stateless functional components into stateful components in which state and lifecycle methods like functionality could be used. 


The useState hook is the primary hook for declaring the state in a functional component. Using it, a state variable can be declared and initialized along with a function to manipulate it. But sometimes state gets complex and the useState hook is not efficient to handle it.


So React provides another hook for complex state management in functional components. This hook is called useReducer. In this article, we will discuss what useReducer hook is and how to use it. 

Wednesday, February 9, 2022

3 ways to Count words in Java String - Google Interview Questions with Solution

Today, I am going to share with you Java interview questions from Google, which were asked to one of my readers during the telephonic round. How do you count the number of words in a given String in Java? You can count words in Java String by using the split() method of String. A word is nothing but a non-space character in String, which is separated by one or multiple spaces. By using a regular expression to find spaces and split on them will give you an array of all words in a given String. This was the easy way to solve this problem as shown here, but if you have been asked to write a program to count a number of words in a given String in Java without using any of String utility methods like String.split() or StringTokenizer then it's a little bit challenging for a beginner programmer.

Difference between save(), saveOrUpdate() and persist() in Hibernate Session

The Session interface in Hibernate provides a couple of methods to move an object from a new or transient state to a persistent state like save(), saveOrUpdate(), and persist() is used to store an object into the database, but there are some significant differences between them. The Session.save() method does an INSERT to store the object into the database and it also returns the identifier generated by the database. On the other hand, saveOrUpdate() can be used to reattach a detached object in Hibernate Session i.e. it can do INSERT or UPDATE depending upon whether an object exists in the database or not. 

Monday, February 7, 2022

7 Examples of HttpURLConnection in Java - Sending GET and POST Request [Tutorial]

If you want to learn how to send GET and POST requests from the Java program then you have come to the right place. Earlier, I have shared free Java Courses for beginners, and today, I am going to show you how to use HttpURLConnection class in Java to send HTTP requests to the server.  The HttpURLConnection is an important class in the java.net package which allows you to send an HTTP request from a Java program. By using this class you can send any kind of HTTP request like GET, POST, PUT, DELETE, HEAD, etc to the server and call REST APIs. 

Saturday, February 5, 2022

15 Technical Core Java Interview Questions Answers for Experienced Developers

When the experience of a Java Programmer grows in the years e.g. when it goes from beginner years ( 2 to 4) to more experience or sort of senior level ( 5 to 7 years), Core Java Interview Questions also change a bit. Of course, basics like data structure, algorithms, and object-oriented programming remains the same, but types of questions will become more advanced and their answers will definitely need to be more detailed and accurate. I often receive queries about core Java questions asked to a senior developer with 5 to 6-year experience, or, sometimes, I am going for an interview of a senior Java developer, what kind of questions I should expect.