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Dzung Nguyen
Dzung Nguyen

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πŸš€ Enhance Your JavaScript Code with the Spread Operator (...)!

πŸ‘‰ Have you ever needed to merge arrays, clone objects, or pass multiple arguments to a function efficiently?

πŸ‘‰ Instead of writing lengthy, repetitive code, JavaScript's spread operator (...) provides a simple and powerful way to do that.

πŸ”₯ What is the Spread Operator?

The spread operator (...) allows you to expand elements of an iterable (like arrays or objects) into individual elements.

πŸ›  Common Use Cases

1️⃣ Merging Arrays

// βœ… Merging Arrays  
const frontend = ["React", "Vue", "Angular"];  
const backend = ["Node.js", "Django", "Spring"];  
const fullStack = [...frontend, ...backend];  
console.log(fullStack);  
// Output: ["React", "Vue", "Angular", "Node.js", "Django", "Spring"]  

// βœ… Merging Arrays & Objects
const extraInfo = { country: "USA", language: "English" };  
const mergedUser = { ...user, ...extraInfo };  
console.log(mergedUser);  
// Output: { name: "Alice", age: 25, country: "USA", language: "English" }  
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2️⃣ Cloning Arrays & Objects

// βœ… Cloning Arrays  
const originalArray = [1, 2, 3];  
const clonedArray = [...originalArray];  
console.log(clonedArray);  
// Output: [1, 2, 3]  

// βœ… Cloning Objects  
const user = { name: "Alice", age: 25 };  
const clonedUser = { ...user };  
console.log(clonedUser);  
// Output: { name: "Alice", age: 25 } 
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3️⃣ Passing Multiple Arguments to a Function

// βœ… Passing Multiple Arguments to a Function  
const numbers = [3, 5, 7];  
function sum(a, b, c) { return a + b + c; }  
console.log(sum(...numbers));  
// Output: 15  
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πŸš€ Why Use the Spread Operator?

βœ… Concise & Readable – Reduces clutter in your code.

βœ… Flexible – Works with arrays, objects, and function arguments.

βœ… Safe & Efficient – Prevents modifying original data.

If you’re writing JavaScript, embrace the spread operator to make your code cleaner, shorter, and more powerful! πŸš€


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