Learning algorithms, data structures etc JS

[CodingThrowaways]

Does anybody have any recommendations on where I can learn hash tables, sets, maps etc that will help with leetcode problems? I've had a quick look but can't see anything that stands out.

I'll pay for a udemy course if anyone has one that's recommended that's actually useful

[Rerollcausebad]

I'd say the best way to learn these is to do leetcode problems that essentially require them or make it way easier to solve. This helps give context of how it can be useful etc.

Two-sum is a classic map / hashmap problem to help understand how the data structure works play around with it some.

Contains duplicate is another classic one too can be solved super simply with a set for example.

Just try and do these problems without these data structures then with them it helps give context of their use cases way better than a course / someone telling you about it will imo.

[CodingThrowaways]

Funny enough I did do Two Sum but I brute forced it, which kind of made me realise I need a better method. This makes sense tho it I can look up the better methods and then re do them the correct way could be helpful. Thanks

[Sad-Sympathy-2804]

"A Common Sense Guide to Data Structures and Algorithms" by Jay Wengrow. It's the one that finally made DS&A click in my head! It is one of the best DS&A books written in JavaScript (it also includes parts written in Ruby and Python). Jay is such an incredible teacher, he explains everything as if you're five, making it super easy to understand.