JavaScript: Empty an array keeping the original

JavaScript Array: Exercise-33 with Solution

Empty Array

Write a JavaScript script to empty an array while keeping the original.

Sample Solution:

JavaScript Code:

// Declare and initialize an array
var arr = [1, 3, 6, 3, -5];

// Output the contents of the array before modification
console.log(arr);

// Set the length of the array to 0, effectively clearing its contents
arr.length = 0;

// Output the contents of the array after modification
console.log(arr);

Sample Output:

[1,3,6,3,-5]
[]

ES6 Version:

// Declare and initialize an array
let arr = [1, 3, 6, 3, -5];

// Output the contents of the array before modification
console.log(arr);

// Set the length of the array to 0, effectively clearing its contents
arr.length = 0;

// Output the contents of the array after modification
console.log(arr);

Live Demo:

See the Pen JavaScript - Empty an array keeping the original - array-ex- 33 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript function that empties an array by setting its length property to zero while preserving the original reference.
• Write a JavaScript function that returns a new empty array without modifying the original array.
• Write a JavaScript function that uses a loop to remove elements one by one using pop().
• Write a JavaScript function that clears an array and confirms that subsequent operations are performed on an empty array.

Improve this sample solution and post your code through Disqus.

Previous: Write a JavaScript function to find an array contains a specific element.
Next: Write a JavaScript function to get nth largest element from an unsorted array.