The Front-End Web Developer Bootcamp - HTML, CSS, JS, and React - Modify and Delete Arrays

This video tutorial explains how to modify and delete values in a JavaScript array. It covers the process of changing an array's value using its index and demonstrates how to delete a value from an array. The tutorial also highlights the outcomes of these operations, such as the appearance of 'undefined' when accessing a deleted index. The main purpose of these operations is to allow changes to predefined arrays in JavaScript.

What is the initial step in modifying an array in JavaScript?

• Assign a new value to the array

• Print the array using console.log

• Add a new element to the array

• Delete an element from the array

How can you change the value of the first entry in an array?

• Use the 'pop' method

• Delete the first entry and add a new one

• Assign a new value to the first index

• Use the 'push' method

What happens when you try to access a deleted index in an array?

• It throws an error

• It returns 'undefined'

• It returns 'null'

• It returns the last value in the array

Which method is used to remove a specific value from an array?

• pop()

• splice()

• delete

• remove()

What is the main purpose of modifying and deleting values in an array?

• To sort the array

• To increase the size of the array

• To update or remove specific data within the array

• To change the structure of the array