splice

Introduction

The 'splice' method in JavaScript allows you to add or remove elements from an array at a specific index. It takes three parameters:

• index: The index of the element to start at.
• deleteCount: The number of elements to remove from the array.
• elementsToAdd: The elements to add to the array.

Practical Steps

To use splice, follow these steps:

1. Determine the index of the element you want to start at.
2. Specify the number of elements you want to remove (deleteCount).
3. Provide the elements you want to add (elementsToAdd).

Example

const myArray = ['a', 'b', 'c', 'd', 'e'];

// Remove 2 elements starting from index 1
const removedElements = myArray.splice(1, 2);

// The array now contains: ['a', 'd', 'e']
// The removedElements variable contains: ['b', 'c']

// Add 2 elements starting from index 2
myArray.splice(2, 0, 'x', 'y');

// The array now contains: ['a', 'd', 'x', 'y', 'e']

Key Concepts

• Index: The position in the array where you want to start adding or removing elements.
• Number of elements to remove: The number of elements to delete from the array.
• Elements to add: The elements you want to insert into the array.