Most Efficient Way to Create a Zero Filled Javascript Array?

When working with JavaScript, you may often come across situations where you need to create an array with a specific length and all elements initialized to zero. In this blog post, we will explore the most efficient ways to achieve this in JavaScript.

1. Using the Array constructor and fill method

The Array constructor in JavaScript allows us to create a new array with a specified length. We can then use the fill method to initialize all the elements of the array with a specific value, in this case, zero.

const length = 5;
const zeroArray = Array(length).fill(0);
console.log(zeroArray); // Output: [0, 0, 0, 0, 0]

2. Using the Array.from method

The Array.from method in JavaScript allows us to create a new array from an iterable object or an array-like object. We can pass a length parameter to create an array with a specific length. We can then use the map function to initialize all the elements of the array with zero.

const length = 5;
const zeroArray = Array.from({ length }, () => 0);
console.log(zeroArray); // Output: [0, 0, 0, 0, 0]

3. Using the spread operator and Array constructor

The spread operator in JavaScript allows us to expand an iterable object into individual elements. We can use the spread operator along with the Array constructor to create a new array with a specific length and all elements initialized to zero.

const length = 5;
const zeroArray = [...Array(length)].map(() => 0);
console.log(zeroArray); // Output: [0, 0, 0, 0, 0]

These are the most efficient ways to create a zero-filled JavaScript array. Choose the method that best suits your needs and coding style. Happy coding!