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In the world of JavaScript development, the rest and spread operators have emerged as powerful tools for simplifying code and enhancing functionality. These operators, introduced in ES6 (ECMAScript 2015), have become essential for working with arrays and objects in Node.js applications.
In this article, we’ll explore the practical applications of rest and spread operators, along with up-to-date code examples to help you leverage their capabilities effectively.
The Spread Operator: Expanding Arrays and Objects
The spread operator, represented by three consecutive dots (...), allows you to spread the elements of an array or the properties of an object into another array or object. This operator is particularly useful when you need to combine arrays, pass arguments to a function, or create new objects based on existing ones.
Combining Arrays
const fruits = ['apple', 'banana'];
const moreFruits = ['orange', ...fruits, 'kiwi'];
console.log(moreFruits); // Output: ['orange', 'apple', 'banana', 'kiwi']
