Modern Web Design with HTML5, CSS3, and JavaScript - JavaScript Array Map Method - Example Code

The video tutorial explains how to create and manipulate arrays in JavaScript. It covers the creation of new arrays from existing ones using the map method, filtering elements based on specific criteria, and constructing new arrays. The tutorial also demonstrates how to use arrow functions for cleaner code and provides examples of multiplying array values. The focus is on practical application and understanding the map method's utility in array manipulation.

What is the primary purpose of using the map method on an array?

• To sort the array in ascending order

• To create a new array by transforming each element

• To find the maximum value in the array

• To remove duplicate elements from the array

How can you filter elements in an array using the map method?

• By using a for loop

• By using a sort function

• By using a filter function

• By using a conditional statement within the map method

What is the advantage of using arrow functions in array transformations?

• They automatically sort the array

• They execute faster than regular functions

• They provide a more concise syntax

• They can only be used with the map method

Which of the following is a correct way to double the values of an array using the map method?

• array.map(value => value - 2)

• array.map(value => value / 2)

• array.map(value => value + 2)

• array.map(value => value * 2)

What does the map method return when used on an array?

• A boolean value

• A new array with transformed elements

• A sorted version of the array

• The original array