1.Safe Calls (?.) - If the object is null, the expression which is using the safe call operator will return null instead of throwing a - Null Pointer Exception. - It allows you to safely access properties or methods of an object that may be null. EXAMPLE OUTPUT EXAMPLE OUTPUT
Introduction: - In the dynamic landscape of software development, managing database schema changes efficiently is crucial for ensuring the stability and scalability of applications. Liquibase, an open source database. It's a free tool that helps you control and organize changes to your database . Chapter 1: What is LiquiBase?
Learn to parse date and time strings into instances of LocalDate and LocalDateTime using strict style using ResolverStyle.STRICT parameter with DateTimeFormatter instance. ResolverStyle – Parsing styles Parsing a string to date in Java happens in two phases: * ResolverStyle is an enum and used to control how phase 2, resolving, happens.
What is Playwright :- Playwright is Free & open source Framework for web automation testing. Created by Microsoft. Introduction:- Playwright Test was created specifically to accommodate the needs of end-to-end testing. Playwright supports all modern rendering engines including Chromium, WebKit, and Firefox. Test on Windows, Linux, and macOS, locally
Chapter 1: PostgreSQL 101 PostgreSQL is an open-source relational database management system (RDBMS) that's freely available for all. Think of it as a powerful tool that lets you organize and manage data effectively. Step 1: Install PostgreSQL : If you haven't installed PostgreSQL yet, you can do
In React Native, we typically use styles or create selectors for styling. However, an alternative approach is to use NativeWind it adds some plugins to Tailwind CSS with the className props, it allow us to use CSS StyleSheets Example 1: Text element with the className prop set to apply for
An AI Powered Image Processor is used in a software using artificial intelligence to analyze images and extract the text (Optical Character Recognition). In any application, you can scan documents like medical prescriptions, business cards, passport, etc and get the text from the document. In the app, you click on
This is the homepage of WORDSMART user can start the use by entering name. Words: A list of words opens in the Words page. When you click on that word, the below screen opens. GRE Wordlists: In GRE Word List, Words are sorted alphabetically. When you click on a specific
The JavaScript reduce method takes each value of an array, and applies reducer function such that it changes the array into a single value. Syntax of .reduce() method: array.reduce((accumulator, currentValue, index, array) =>{....}, initialValue} The .reduce() method takes two arguments : 1. The first is reducer function, which is
This is an AI-based educational app. This app is built for school students to study virtually. It is available for all classes from 1st grade to 12th grade. Sign up/ Log in If you are a new user, you need to register it first. To register with the Shiksha App
Open the Spring initialize : https://start.spring.io/; Steps Version/Language Select the Project Gradle -Kotlin Select the Language Kotlin Select Spring Boot Version 3.2.0 Group Name com.example Artifact Name demo11 Name demo11 Project Description Demo Project for Spring Boot Package Name com.example.demo11 Select Packaging
In JavaScript scope and closure are two fundamental concepts, scope determines the accessibility of variables, while closures are functions that keep certain variables safe and accessible even after their original functions have finished running. Scope In JavaScript, scope defines where variables can be accessed or referenced. While some variables can
The Tab Navigator is tabbed at the bottom of the screen. It is used to switch between different route screens Bottom Tabs Navigator : The tab bar is fixed to the bottom of the screen. Each tab is linked to a screen and displays an active state when selected. By using
Login: In this Login page login is done after entering username and password. If the user is not registered then he can register by clicking on the Register link and after the registration is complete, he can login by entering the username and password. Employee: Dashboard: In the Total Calls
The car accessories app is useful for providing accessories for all TATA cars in one click. Here, you will see a list of all accessories suitable for your car. Register To Register with this app, you need to click on the register button and then need to register with your
Drawer Navigator renders a navigation drawer on the side of the screen which can be slides in and out from the left or right side of the screen. To use this navigator, install the necessary react native package by running following command npm install @react-navigation/drawer Also install dependencies using