JavaScript Data Structures & Algorithms + LEETCODE Exercises (Udemy.com)
DSA + LEETCODE for Coding Interviews — Clear, Step-by-Step Animated Walkthroughs!
Created by: Scott Barrett
Last updated April 2026
What you will learn
- Solve 86 coding exercises to ace DSA interviews with confidence.
- Think like a pro coder to tackle complex problems efficiently.
- Master data structures—linked lists, trees, heaps, graphs—for practical use.
- Learn algorithms—sorting, recursion, dynamic programming—with clarity.
- Analyze time and space complexity to optimize your coding solutions.
- Grasp DSA concepts faster with animated examples for deeper insight.
- Apply DSA to solve LeetCode challenges and practical coding problems.
- Boost your developer skills to excel in technical interviews confidently.
Quality Score
No CourseDuck member has rated this course yet. Taken it? Give each part a thumbs up or down.
Overall Score : 98 / 100
Course Description
Welcome to Data Structures & Algorithms in JavaScript
This course makes learning to code fun and makes hard concepts easy to understand.
How did I do this? By using animations!
Animating the Data Structures & Algorithms makes everything more visually engaging and allows students to learn more material - in less time - with higher retention (a pretty good combination).
I will use these visuals to guide you, step-by-step, through the entire course.
The course also includes dozens-and-dozens of Coding Exercises. So you can immediately put everything into practice as soon as you learn it (a very important step).
All of this will help you to feel more confident and prepared when you walk into a coding interview.
I have made several Free Sample Videos available for the course so you can see the difference the animations make.
Also, I am very active on the Q&A, so I will be with you every_step_of _the_way.
_____________________________
What you will get in this course…
Over 100 hand-crafted animated HD videos to illustrate the Data Structures & Algorithms.
Here are the topics we will cover:
Technical
Big O notation
Data Structures
Arrays
Linked Lists
Doubly Linked Lists
Stacks & Queues
Binary Trees
Hash Tables
Graphs
Heaps
Algorithms
Dynamic Programming
Sorting
Bubble Sort
Selection Sort
Insertion Sort
Merge Sort
Quick Sort
Searching
Breadth First Search
Depth First Search
Don't just take my word for it though, check out what existing students have to say about my courses:
5-Star Review:
"In order to describe this course accurately, we need the definition of the word Beautiful. beau·ti·ful: adjective 1.- pleasing the senses or mind aesthetically. 2.- of a very high standard; excellent." - Josue Hernandez Amezcua5-Star Review:
"The best course on DSA on Udemy" - Enlai Li5-Star Review:
"One of the best courses on DSA. The animations do make a huge impact. All the points are explained in detail. The only problem is that I can't give it more than a 5-star rating." - Nikita Sarkar5-Star Review:
"Amazing Course. My words cannot describe how much animations helped me to understand the concepts. 100% Recommended." - Simarjeet Singh5-Star Review:
Being a visual learner this is BY FAR the BEST course ever. The way the instructor presents this topic makes it so easy to understand." - Eduardo SN5-Star Review:
"The animations were really helpful for an easy understanding, but the best thing about this course for me is that it will not waste your time! It is perfectly optimized, covers the important topics that I wanted, and at the same time perfectly clear. Thank you so much." - Fatemeh Moghaddam5-Star Review:
"This course is very well done! ... the animations in each video take the explanation and understanding of the material to a new level." - Luis Felipe Posada5-Star Review:
"This course has seriously been amazing. The animations have worked wonders for my understanding and I have made significant progress from the beginning of the course until now." - Dakota Fabro5-Star Review:
"I can follow as a beginner, amazing." - Sabrina Fung5-Star Review:
"This is the best course I have ever seen" - Luong Viet Tri
REMEMBER… I'm so confident that you'll love this course that we're offering a FULL money-back guarantee for 30 days! So it's a complete no-brainer, sign up today with ZERO risk and EVERYTHING to gain.
So what are you waiting for? Click the "Buy now" button and join the best JavaScript Data Structures & Algorithms course on Udemy.
I look forward to seeing you in the course.
Now let's get started! :-)
Instructor Details
- 4.9 Rating
4,131 Reviews
Scott Barrett
Hello, I'm Scott, a developer with a passion for teaching.
I've helped Hundreds of Thousands of students learn to code and change their lives by becoming developers.
My courses make learning to code fun and make hard concepts easy to understand.
How do I do this? By using animations!
Animating the code and the concepts makes everything more visually engaging which allows students to learn more material - in less time - with higher retention (a pretty good combination).
I will use these visuals to guide you, step-by-step, through the entire course.
My courses also include dozens-and-dozens of Coding Exercises. So you can immediately put everything into practice as soon as you learn it (a very important step).
I have made several Free Sample Videos available for each course so you can see the difference the animations make.
Also, I am very active on the Q&A, so I will be with you every_step_of _the_way.
I look forward to seeing you in the course.
Let's get started! :-)
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Reviews
By Uroy Chinwuba Nwankwo on 5/21/2026
The explanations are very clear and the coding exercises have helped internalize the concepts properly. I would recommend this course to anyone thining of taking it.
By Grazielle Amanda do Carmo Café on 5/11/2026
Curso excelente! Não sei como aprenderia tantos conceitos e códigos sem este curso. Ótimas aulas e explicações e cheio de códigos para irmos treinando. Muito bom, nota 10!
By Joshua Foxworth on 3/20/2026
I feel like this was a really, really good intro into data structures for non CS majors. The explanations are exceptionally clear and the diagrams are great.
By Jeff Farmer on 3/19/2026
Animated visual diagrams make this course so much easier to understand DSA. I would highly recommend this course to anyone who needs to learn this subject.
By Lion Arar on 3/10/2026
Great explanations, great visual aid. i haven't seen a teacher yet be as clear and as helpful. The animations bring a remarkable help as someone who thinks in pictures and not words.
By Akarsh Bisht on 2/22/2026
Says we wont focus on space complexity more. But, since it's a DSA course I think both space nd time complexities are important.
By Sreaya on 2/20/2026
At first, I was reluctant about whether I should buy this course, but after getting started, I’m so happy that I chose it. His teaching method is excellent, and the concepts are crystal clear to me now.
By Rujith Ramu on 12/23/2025
Amazing explanation with beautiful visualizations. The way each data structure and algorithm is broken down step by step makes the concepts very easy to understand and remember. Visual explanations really help the logic stick in your mind instead of just memorizing code. Highly recommended for anyone learning DSA from scratch or revising fundamentals.
By Lewis Benson on 10/17/2025
Detailed explanations. Followed by actual practice. Followed by realistic coding interview challenges. Best DSA course I have found. Creating the data structures with a class instead of using built-in ones makes things much easier to understand.
By Sumit Abhishek on 9/13/2025
The best part of this course is the visualization of concepts – it made understanding data structures and algorithms so much simpler. In most other courses, they just show dummy code, which can be confusing for beginners. But here, every concept was explained visually first and then implemented in code, which helped me grasp the logic much faster. Highly recommended for anyone starting out with DSA in JavaScript!"








