Q171. What is a first class function?
In JavaScript, **first-class functions(first-class citizens)** mean that functions are treated like any other variable. That means: 1. You can assign a function to a vari...
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Q172. What is the difference between HTML and React event handling?
Below are some of the main differences between HTML and React event handling, 1. In HTML, the event name usually represents in _lowercase_ as a convention: ```html ``` Wh...
Q173. How do you create a new Next.js project?
The officially supported and recommended way to scaffold a new Next.js application is using **`create-next-app`**: ```bash npx create-next-app@latest ``` ### Interactive ...
Q174. What is the difference between <b> and <strong> tags in HTML?
The `` tag is used to apply bold formatting to text, while the `` tag is used to indicate that the text is important and carries stronger semantic meaning than ``.
Q175. What is the purpose of type annotations in TypeScript, and how are they used?
The purpose of type annotations in TypeScript is to specify the types of variables, function parameters, and return values. They help catch errors during development and ...
Q176. What is a first order function?
A first-order function is a function that doesn’t accept another function as an argument and doesn’t return a function as its return value. i.e, It's a regular function t...
Q177. What are synthetic events in React?
`SyntheticEvent` is a cross-browser wrapper around the browser's native event. Its API is same as the browser's native event, including `stopPropagation()` and `preventDe...
Q178. Can we rename a column in output?
Yes, using `AS` (alias): ```sql SELECT first_name AS fname, last_name AS lname FROM customers; -- AS is optional but recommended for readability: SELECT first_name fname ...
Q179. What is a higher order function?
A higher-order function is a function that either accepts another function as an argument, returns a function as its result, or both. This concept is a core part of JavaS...
Q180. What are inline conditional expressions?
You can use either _if statements_ or _ternary expressions_ which are available in JS(and JSX in React) to conditionally execute or render expressions. Apart from these a...