What are some examples of JavaScript arrow functions?

What are some examples of JavaScript arrow functions?

Arrow functions are a concise way to write function expressions in JavaScript. For example:

1. Basic syntax: const add = (a, b) => a + b;

2. No parameters: const greet = () => 'Hello!';

3. Single parameter: const square = x => x * x;

4. Returning an object: const createUser = (name, age) => ({ name, age });.

Can you explain the difference between arrow functions and regular functions?

Sure! The main differences are:

1. Syntax: Arrow functions are shorter and do not require the function keyword.
2. this binding: Arrow functions do not have their own this context; they inherit it from the parent scope, while regular functions have their own this.

Are there any limitations to using arrow functions?

Yes, some limitations include:

1. They cannot be used as constructors.
2. They do not have their own arguments object.
3. They cannot be used with yield in generator functions.

Can you show me a practical example of using arrow functions?

Certainly! Here's a practical example using map with an arrow function:

const numbers = [1, 2, 3, 4];
const doubled = numbers.map(num => num * 2);
console.log(doubled); // Output: [2, 4, 6, 8]