Data Structures Explained for Beginners - How I Wish I was Taught
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- เผยแพร่เมื่อ 7 พ.ค. 2024
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If I was a beginner, here's how I wish someone explained Data Structures to me so that I would ACTUALLy understand them.
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Data structures and algorithms are not most people's favourite coding concepts to learn. nevertheless, if you want to learn how to pass coding interviews, mastering data structures and algorithms is a must.
From linked lists to priority queues to graphs...when I was a beginner, I could not understand why these things are even important. What do data structures even mean and why do big tech companies ask these stupid leetcode-style questions in coding interviews?
But once I actually sat down and over a few months learned the theory and practice of data structures, I started to appreciate just how beautiful computer science can be.
In this video, I explain data structures for dummies and (hopefully) in a future video, I will explain algorithms in a similar way!
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CHAPTERS:
0:00 How I Learned to appreciate data structures
1:50 What are data structures & why are they important?
3:20 How computer memory works (Lists & Arrays)
6:00 Complex data structures (Linked Lists)
8:10 Why do we have different data structures?
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11:35 A real-world example (Priority Queues)
14:30 The beauty of Computer Science
15:40 What you should do next (step-by-step path)
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On this channel, my aim is to give you the tools, strategies and methods to learn to code effectively - according to science! In addition, I document my life as a self-taught software engineer. - วิทยาศาสตร์และเทคโนโลยี
I finished the cs50x course a month ago and just finished cs50w. It has literally turned me from knowing nothing about programming to the point that I want to code every single day. I just can't think you enough for recommending these amazing courses for me. Btw, the video is great. Hope your channel gain back views
So awesome to hear, that is exactly what I want to do with this channel: to get people excited to code! CS50 is what initially did that to me!!
@@InternetMadeCoder hi where I can watch cs 50 course ?
is there any link where I can get this course free of charge?
@@JG-lb8xk It's free, the only thing you have to pay is the certificate which is if you only want to have the certificate
hey I have question since I'm thinking to take those courses right now. cs50 course says web programming with python and JavaScript and why it says python I don't understand because python is used for back end or for something other, since when python became language for web development?
I LOVED data structures! One of my favorite classes back in 1991 was Data Structures In C. This was before they started teaching Java in the Uni, which was before they started teaching Python as they do now. Back in the day you had two choices - C and Pascal. I saw the writing on the wall and I knew C was the future, so I focused on C (after taking one requisite Pascal class). Anyway, that data structures class was the best class I ever attended, and I probably use more from that class in my every day coding than any other class I attended for programming. We learned deques, linked lists, queues, stacks, rb trees, binary trees, and probably a half a dozen more data structures that I am forgetting right now. In fact the first thing I do when I learn a new language is implement those data structures. Even though they might already be implemented as a feature of the language I will implement them anyway to get a better understanding of the language. For example, most duck typed languages have associative arrays built in as part of the language implementation, but that doesn't stop me from creating a red-black tree in that language anyway :D. I live and breath computers, always have, so for me anything that helps me understand them better is a goal for me. I'm auto-didactic and taught myself assembler on the IBM XT (back in 1986) using the DOS Debug command when I was 14, so learning about languages is something that I really enjoy.
What do you recommend for someone trying to study data structures by themself
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lmao what are these replies. anyways, awesome story!
Enough with your life story. Focus on telling us how THIS video was useful.
Just came across your video. This is gold. I had an idea of data structures, but having you link it to memory in the computer and why it matters.... *chef's kiss*
glad my video helped!! Figuring out this link is what sort of made things 'click' for me too
I have played around with python a bit and thinking about how you wanna organize data and writing reusable functions that work with that makes a lot of stuff a lot faster to code, and you need to fix a lot fewer bugs. It's like when you have containers on ships and all harbors are set up to load and unload containers of that size from ships. It just makes everything a lot smoother and faster (if you do a good job with your structures in the first place).
This isn't as low level as the stuff in this video but it's similar, just more surface level
Keep the videos coming man! You’ve got a great pulse on what I want to see
🔥🔥
Thanks for explaining this stuff so clearly and why it is so important to learn it. I had a mental block going in to learn this stuff cause I never use it at work to the extent that they are going to have you do at interviews, you really sold it to me with your creative analogy of someone maintaining a messy room. Thank you very much again!
Thank you Toumas so much for this video, it's great to know foundational topics like DS&A from someone who went through the same journey, to give me a clear vision of what one can face in later stages,
please we need more videos like these, a series of an overview of what a self-taught programmer should know,
also it'd be great if you could imitate problems like the ones you face at real work, to see how the things I'm learning are applied in real life.
Glad it was helpful! I plan to do a lot more content related to DSA as it also helps me solidify these concepts even more!
Thank you for creating this video. I believe that many people typically have a lot of problems attempting to understand DSA. Also it's quite important as for any Software Engineer.
yep exactly
C, C++ is good way to learn data structures because you have to do all things manually it is good way to understand what is happening behind the scenes
true, at least you want to learn a low-level language eventually
I have experienced that same epiphany about the importance and, yes, beauty of data structures. And not just in Programming and CompSci. My background is in Physics, EE, and Computing, but I now run a company and so on the surface I spend more time thinking about sales, finance & accounting, HR issues, and so on than I do about technical matters. But that's only the surface. In a deeper and more real sense, it truly is data structures all the way down. At the risk of being too grandiose and philosophical, I now see data structures as being so important and fundamental not just because they concern the way we organize the stuff we put in our computers; data structures are so important and fundamental because they concern the structure of thought itself.
damn u sold me
Hey! New to the channel and definitely enjoying the content! Wondering if you could do more in-depth break downs on just some of the data structures such as ID= , Class= console.log etc
This is the best explanation as to not just what are Data Structures, but the most important reason as "Why" they are needed and so important. I've never heard anyone talk about them this way.
You have the best way of explaining things for someone like me. Just subscribed. Thank you!
I'm so glad to hear that you found this helpful! I noticed with many things that once I figure out the 'why', the 'how/what' become a lot more easier to understand as I can have the big picture/why this thing exists in mind. And I agree that I haven't seen anyone else make this kind of explanation on DSA so I wanted to make mine.
@@InternetMadeCoder Exactly! Thank you!
Thank you so much for this video. I am a second year data science student and I'm starting to get overwhelmed with studying the data structures, algorithms and computability module. Finding your video is helping me feel more calm about it.
You do a nice job of going over "what's in it for me." Love the 'no one wants to hire a developer who keeps their code like their messy room.' (Not a direct quote.)🙂
Oh man this is such a good explanation and as soon as you said the word abstraction my brain had already gone out to thinking out hypothetical algorithms. I’m just getting back into coding since I’ve been busy with uni and mostly coded in the summers, but now that I’m trying to get back and conquer JavaScript this was a very eye opening video so thanks for that!!
man great video once again, I would recommend you to also make such informative videos about data science, data analysis and other data related fields. Thanks!
This was actually good and it can be even better if you would add more examples for each data structure there is.
Great content as usual!!! Would love to see a video on algorithm!!
Dude this video is awesome ! I am currently a third year Comp Sci undergrad taking my esteemed Data Structures & Algorithms class right now ! This is of great help ! thankyou🙏🏿
Thank you so much!! It gives a general overview of how data structures work , definitely great for beginners
This is an amazing refresher as well. Amazing video bro!
This is a brilliant explanation 👏 you have made things so understandable with the visualization
Glad it was helpful!
I’m new to learning programming, and this made a lot of sense. Thank you.
Glad it was helpful!
Thank you so much! It’s really easy to understand data structures following your thoughts
I just have few days to get into Fang and I have no idea about DSA as a whole. I was searching whole internet for a video explaining briefly about all data structures- array, lists, arraylists, linked list, stacks, queues, hash maps, trees. And when to use where just in brief, just for implementation purpose. But whole net was flooded with hours of vids for each DS. But yours man!!!! Its the one we all need, people like me. Thanks man. Can u make more of it covering all of those ds in brief pls. I use JAVa
This is so well done. Thank you! Subscribed 👍
Thank you for your video. It's really inspiring and encouraging for me as a self-taught developer learner now. It's really hard for me to hold on myself alone. But everytime I watch your video it makes me reenergized to learn again. Wish you all the best and respect
I have completed a DSA purchased on Udemy; the best part of the course …animations were used to drive home the key point etc. getting this information from different perspective is very important as it allows for review, re-learning and retention, Basically, repetition. Thank You! ☺️🙌🏿🙏🏾
yes indeed!
Which course u opted..
@@naazj8508 “Data Structures and Algorithms- Java” By Scott Barrett! He really drives the points home and gets you in the habit of thinking about “edge cases!” Cheers.
what course did you choose specifically?
I actually bought the scott barett one a few says ago too! I heard the animations were great in the reviews so it's great you like it
OMFG THIS IS ONE OF THE BEST DS&A VIDEOS ON THE INTERNET. Currently studying ds&a @ a top university and it's so frustrating how the profs never mention the WHY, they just dive into the HOW without any explanation or background.
Bro I had just completed my Java course and I decided that I'll start my DSA FROM TOMORROW and think what's you upload a video on DS this is very useful.
You should have to make video on algorithms we'll like it and learn from it.
wonderful, tutorial ....i also have a hard time understanding these concepts....this has really given me a great overview of what data structures is all about
thanks! great to hear it helped!
I started with a python course and fell down a rabbit hole and along the road came data structures amd algorithms, I cam see the beauty in it
Nice work @internet made coder! You have a personable and calm style.
You totally cleared this out for me, thank so so much 💓.
Thanks for the vid. I've just started my master degree in computer science with no basic knowledge about programming and coding at all and couldn't understand much in the Algorithm class today, but I've learnt something fundamentally from this vid. You've made it easy to understand (and not to mention that you're quite easy on the eyes..LOL). Anyhow, may I ask what programming language you're using in the vid when you show the example of the codes?
No language, it’s pseudocode
I just started coding some months ago and this made perfect sense to me!
This is a very interesting way of explaining a data structure and memory storage. Thanks!
We certainly appreciate your support on our software developer journeys!
Learning computer science @ Honolulu Community College around 1990, I really fell in love with Pascal's pointers.
ideally you want the data to fit in the CPU cache, so you want to group data that you will carry computation together in a single data struture, student id, class year together so you can carry a simple instructions to increment their class year at the start of the academic year, you don’t need to fill the cpu cache with first name, middle name, dob, sex, address etc...
Just watched the first ten minutes of your video. I wish I was taught this way. I am going to steal your example and teach it in my lesson tomorrow thanks dude Data Structures made clear
Go for it!
Best Explanation. I want more videos like this or may be a complete series on DSA. Real World Examples really make everything simple to understand :)
Glad you liked it!
Couldn't agree more man 🙏🙏
Brilliant. So glad found your channel
So glad!
Thank you for sharing this information. So end-user interfaces are abstractions of data structures and data structures are abstractions of machine code?
I like how you explain things. Great job 👏 keep it up.
You're a keeper of this realm
keep going deep
My first "data structure" was years ago, when I learned some C++ and created an application using linked lists, I remember trying to work out the pointers, using post it notes ; )
Lol I wrote my post before watching the video
Thank you for explaining this thoroughly!
The initial example with lists and registers is off. You've also used the term "memory register". Memory, and registers, are different things entirely. You don't store lists in registers. Unless your writing an OS or a compiler, you shouldn't have to worry registers. If you're working in a high level language, hopefully the lowest level you ever find yourself in is a "page"
Beautiful explanation 👌🏾
I have a question! I really want to do leet code problems for fun like solving a puzzle but I don't know any coding language. Do I need to know a coding language to start doing leet code problems or is it something I can pick up along the way of solving them
Thank you. This was very helpful.
Thank you! Subscribed 👍
I love your explanation!! Great video.
DSA feels intimidate when learning, but it get more frustrated when you face a problem that require certain data structure to even understand the problem you facing.
So, don't skip learning Data Structure once you familar with programming language syntax.
Great video! Very well explained!
Thank you for the clear explanation
Fantastic video! I learned a lot, and you actually didn’t have to use actually as much as you did, actually
I started learning how to program I think what you referring to is how the compiler analyzes any giving code am I right ?
I’m new to coding but I have edited enough videos to say no weird zoom ins or cuts are necessary. There is enough well executed cuts in the video without the zooms
Kiitos! It's funny to hear someone say that about algorithms. For me it's the opposite - I'm trying to learn the language quickly so I can fluently start learning algorithms.
Really great insights about data structures thankyou well done
I am 13 yrs old and I still understood the entire lecture!!! thx a lot.
Very good. It is only now that I understood data structures. Now that all is clear, I have already given away all my books.
You got my subscription happy to see tech TH-camrs from London
after watching your videos i can see the progress in my learning and im taking CS50, im literally struggling alot with the logic, if i tried 50 ways the solution will be in the 51 way, and the problem is im not able to think beyond that, im thinking alot to get the logic but im not able to get that, is it really i cant get the logic or is it lack of something else, can you please help me with this, your videos gave me a good thought and im feeling a bit confident when compared to before. even though if im struggling., it will be helpful for me alot if you reply.,
there will always be problems that you'll struggle with. All the time I too end up looking up the answer, spending some time to properly understand it, and move on. I think the best balance is to try for a good amount of time, but if you're stuck, just look up the answer and make sure you understand it. Then move on to the next. THis has worked for me.
@@InternetMadeCoder I'll follow that, and thankyou very much for replying
I don't understand the advantage of linked lists. If they are efficient for storage in memory but inefficient for actually accessing that data, how are they any more efficient overall? At the end of the day, it's all about being able to retrieve the data we need in the fastest way possible, right?
Thanks you for your effort your put in every video man
Thanks for explaining everything so thoroughly.
My pleasure!
Really nice and helpful... Thanks!
thank you, i am understanding this much better now
Thanks a lot man!
I really like the video. My take away from this is that "a lot of times certain DS are about the operations we want to do with the data".
Yess
can't wait for the algorithms video
Honestly, Ive been coding for about 5 years in an organization with some very good and experienced developers. Ive looked at 50+ repos and have not found even 1 example of linked list being used in any of these apps.
Watching your videos from.Ethiopia ❤👏 i love your contents !❤
Thank you great videos..❤
You explained this very well
I want to learn cs50 course. Is this course is take certification fee or not
? And what is the time time duration to complete the course.
Man!!! 🤠….
I really can’t take off this hat,, but we really respect & love what you do!!thanks mate 😍
Waiting for the next video ✌❤️✌
This is an incredible explanation
0:15 you had this impression when you're learning data structure and i always have this impression whenever i study XD
You really good at explaining thank you
I definitely need help on oop and loops(lists, tuples, dictionary's, arrays) & function combos(algorithms).
I would like to see real source code, so I may read it and understand the whole Source File.
Given that data structures help to make data organized and efficient, do they help to optimize a game's code?
yes
What's that editor you're using?
this video is very helpful!!! thank you 😊😊
Glad it was helpful!
Very good video! thank you for sharing.
Why not to create a playlist of data structures, Your way of explanation is great.. playlists will gonna help so many of us.
I will do that! Next video is in preparation
@@InternetMadeCoder great❤
Thank you ☺️ in school for SE At flat iron and taking #cs50. Thank you for breakdown.
I hava a question, like if you want to add 8 in the list, instead of overwriting "hello" we can just apped it right? I'm a bit confused , I didn't understand why do we need to make Linked list. Any help is appretiated.
In practice you can do this because under the hood what most languages do is they copy the array into a different location in memory. But this is inefficient.
Correct me, but probably the only point of data structures and algorithms is make slow code faster.
You don't have to understand all math behind it, but know how to use is more important.
You can see that some data structures and algorithms will take 0.3 secods, some 8 hours (extreme example)
But even 8s and 30s is enormous difference between different data structures- it doesn't matter for your small pet prject,
but as soon there is a lot of data (like tens of thousands transactions a second) it will eat all your memory even if it's hundreds of gigabytes of RAM,
or add some incapsulation and your script went from 5 minutes to execute to 2-3 or even 8 hours just because you don't know your data structures.
My advice, don't go deep into it at the beginning, read very very basic definition, then search for many easy examples why people choose particular data structure and algorithm and you get it fast.
When you start using, check math and theory later.
Very basic understanding is not hard, start with it.
You inspired me a lot to start coding, so i started the CS50 program , but I am struggling with some problems . Can someone help me ? Where can I find the answers of CS50?
google
Nice work Internet Made Coder! Or shall I say, Internet MAD Coder! 😜
Very well explained 👍
Glad it was helpful!
very helpful, thanks.
Great explaination
a little pause between different concepts and information will be highly appreciated :)
hey can you show me the Linkedlist class in full display or show me a link to it cause I was writing that code down so I could comment and break it down for better understanding