Скачать или смотреть Complete Hashing in 1 Video + MAANG Level Problems | DSA in JavaScript | Part 20

Welcome to your one-stop solution for mastering Hashing in Data Structures!
In this power-packed video, we’ll walk through the complete foundation of Hashing, covering everything you need to know before solving problems based on Maps, Sets, and Frequency Hashing.
We’ll begin by building strong fundamentals — learning what hashing is, why it’s needed, and how it works behind the scenes. Then we’ll explore practical implementations using JavaScript Sets and Maps, and finally, solve MAANG-level problems step-by-step using hashing techniques.
Whether you're a beginner starting your DSA journey or preparing for product-based interviews, this video is your foundation for understanding and applying Hashing in real-world coding problems.

🧠 Here’s What You’ll Learn:
•⁠ ⁠What is Hashing & Why It’s Needed
•⁠ ⁠Internal Working of Hashing
•⁠ ⁠JavaScript Set and Map methods
•⁠ ⁠Difference between Object and Map
•⁠ ⁠Step-by-step dry runs & optimal solutions for:
Frequency counting
Pair sums
Subarrays & sequences
Real MAANG-style problems

🧩 Homework Questions:
•⁠ ⁠✅ Leetcode 350: Intersection of Two Arrays
•⁠ ⁠✅ Leetcode 525: Contiguous Array
•⁠ ⁠✅ GFG: Count Distinct Elements in Every Window

Instructor - Ali Ansari

💡 Whether you're preparing for coding interviews or brushing up on DSA fundamentals, this video is a must-watch in your learning journey!

🚀 This is Part 20 of the DSA with JavaScript series, helping you master Data Structures and Algorithms for top tech companies.

Don't forget to LIKE 👍 this video, SUBSCRIBE 🔔 for more DSA tutorials, and COMMENT below if you have any questions or suggestions! 🚀

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🕒 Timestamps:
00:00 - Intro
00:26 - Agenda
01:24 - What is Hashing
03:00 - Why We Need Hashing
07:16 - How Hashing Works Internally (High Level)
10:48 - What is Set and Its Methods
15:25 - Problem 1: Delete All Elements with Even Frequency Except the One with Single Occurrence
24:28 - Problem 2: Check if the String is Pangram or Not
29:25 - Set Methods Continued
41:25 - Object vs Map – Key Differences
43:56 - Problem 3: Print the Frequency of Each Character
50:40 - Problem 4: Sort the People
59:15 - Problem 5: Two Sum
1:09:20 - Problem 6: Intersection of Two Arrays
1:19:30 - Problem 7: Subarray Sum Equal to K
1:42:31 - Problem 8: Longest Subarray with Sum K
1:59:00 - Problem 9: Longest Consecutive Sequence
2:23:09 - Outro


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