In this video, we'll explore the powerful array functions map, filter, & reduce in JavaScript.
We'll start by understanding how these functions work and their practical applications. Then, we'll dive deeper by creating polyfills for each function to gain a deeper understanding of their implementation.
We'll also tackle JavaScript interview questions that require the use of these functions, testing your problem-solving skills.
TIMESTAMPS:
0:00 - Introduction
0:31 - map() function in JavaScript
2:02 - Polyfill for the map() function
5:00 - filter() function in JavaScript
7:20 - Polyfill for the filter() function
8:00 - Introduction to Array.prototype
8:26 - What is a Polyfill?
10:15 - reduce() function in JavaScript
12:13 - Polyfill for the reduce() function
15:30 - Q1: Return the length of the longest word
17:26 - Q2: Return the longest word
18:46 - Q3: Return the factorial of the largest number
21:26 - Finding factorial without reduce()
23:26 - Q4: Find the average score of students who scored above 90
26:01 - Questions for practice
Join us on this journey to master these essential JavaScript functions and gain confidence in your coding skills. Whether you're preparing for an interview or seeking to level up your JavaScript knowledge, this video is for you. Let's dive in and become experts in map, filter, and reduce!
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