Understanding and implementing a Linked List in C and Java
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- เผยแพร่เมื่อ 29 มิ.ย. 2024
- Patreon ➤ / jacobsorber
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Website ➤ www.jacobsorber.com
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Understanding and implementing a Linked List in C and Java // Linked lists are one of the most fundamental data structures that any computer programmer needs to understand and be able to use. It's linear, like an array, but makes it much easier and faster to insert items into the list and remove things from the middle of the list. This video describes the basic concepts behind linked lists and provides code examples in both C and Java to help you get started.
Follow-on video about doubly-linked lists:
• Doubly Linked List (in C)
***
Welcome! I post videos that help you learn to program and become a more confident software developer. I cover beginner-to-advanced systems topics ranging from network programming, threads, processes, operating systems, embedded systems and others. My goal is to help you get under-the-hood and better understand how computers work and how you can use them to become stronger students and more capable professional developers.
About me: I'm a computer scientist, electrical engineer, researcher, and teacher. I specialize in embedded systems, mobile computing, sensor networks, and the Internet of Things. I teach systems and networking courses at Clemson University, where I also lead the PERSIST research lab.
More about me and what I do:
www.jacobsorber.com
people.cs.clemson.edu/~jsorber/
persist.cs.clemson.edu/
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A warning to those who try to write the code as it’s shown: Blink and you’re dead
Great vid btw cheers
Thanks. Yeah, playing back at half speed might help.
Omg
Omg weeping angels run and don’t blink!
@@JacobSorber rushing in this case creates tiny mistakes, also it's easier to understand slower line-by-line when first introduced
@@JacobSorber I watch in 2x :)
NOW I know what pointers are used for in C!! Can’t imagine all the things you could do with them. That’s amazing! Thank you!
I know, right?
Pointers are also very handy for giving a function a pointer to some big data and you won't be moving as many variables
you can even develop hacking software for games using pointers in c++
I'm gonna have to watch this at half speed.... very dense with good info :)
Its actually very intuitive...
i watched it x2
@@thengakola6217 🙇🙇
@@neillunavat depending on how much exposure you've had, but hey take the time to feel good about yourself LOL
post your github, lets see your projects bud
Your keyboard must be heaven to ASMR listeners.
makes me anxious af lmao especially when he stops talking, what a disgusting sound xd
this honestly was the best way to explain the linked lists ,going from the basics and reaching the more complex functionalities ,
Thanks. Glad you enjoyed it.
I have been coding in Python and Java for a couple years now, but C had always seemed very intimidating. I am glad I found your channel. Thank you
Thank you. I really like that you understand what you're talking about and it feels like you really enjoy programming, which makes it fun and easy to follow you.
Amazing video. I am taking an online programing course and for homework, i got stuck with trying to implement a linked-list in C. I understood the theory, but this video helped me see how to actually use it in code.
Amazing video. Very smart guy. I had to pause the video and write the code in pen for the first 10 mins until I saw what was happening.
Thank you very much.
This Professor is brilliant. I love using your videos Jacob! They really lit up those areas of my brain that needed to grasp C. From a dull glow to a flashing glare! Thanks so much.
Thank you so much for making this awesome video, I got confused after going through a three-hour lecture. But this video just helps me solve that confusion within 30 minutes.
Dude THANK YOU. You just made me understand pointers to pointers in a single line with that insert_at_head. I always thought it only served to pass arrays of pointers and chars
I'm graduating in May 2021 and preparing for Leetcode and Hackerrank technical interview questions. Jacob, your explanation of how Linked Lists work, and the accompanying C implementation is extremely helpful. I mostly program in garbage collected languages like Python and Java, but after watching re-watching your videos and struggling with my compiler for a while, I feel like I finally understand how Linked Lists are implemented under the hood.
Hope you got your job bro
@@verbisdiablo Thank you! Yes I did get the job and really like it so far. I hope you are doing well.
@@verbisdiablo Thanks! Fortunately I did get the job and it's going well so far.
I gotta be honest all of this is great and all but if you're gonna use linked list a lot then implementing them each time will be such an exhausting and time wasting process so it's better that after you understood how they work that you create functions ready for use when ever you want so that you don't implement time every single time.
Thank you so much I really appreciate the effort and patience you put into your videos , I have my exam tomorrow and I was struggling to understand the concept and it's implementation throughout the semester but your explanation came in handy and made things easier for me ; wish me luck 🤞
Perfect demonstration that learning to program only in very high level languages such as Java, Python etc will always hide from you the elegant simplicity and beauty of data structures ...
This is a great video, very grateful for the efort you put into this.
5 minutes in and the explanation is already so helpful. Edit: After going beyond 5 minutes, the speed of his code isn't very convenient really.
Great editing on the video, very well done on explaining this concept and presenting this video in a nice format! Thanks mate :)
Your videos are fantastic. Thank you so much for sharing this knowledge in such a didactic way. Hope to be able to buy your course soon! 👏👏👏👏
"Oh Java i just love your quirks" is my life's motto now
Glad I could help. It's more positive than some of the other java-inspired life mottos.
This guy reminds me of my professor. Covers materials at 100 mph, then asks you got it? Understood? Good. Let's move on.
Me: Wha.....?
Nobody spoke up. So, I kept going. :)
Seriously, I do slow down in person, when I can gauge from student faces how things are sinking in. Fortunately, with TH-cam you can replay and watch it at reduced speed.
@@JacobSorber haha true that. I do have difficulty understand some other pieces of the code though that weren't explained what it does. But overall I think better to understand than my professor.
HOLY CRAP I LOVE THIS VIDEO THANK YOU. The general concept just did not click in my head bit watching this video made me realise how it works it all makes sense now. Definitely subscribing just for that.
I think this is the simplest program of linked list, Thank you :)
I love the simplicity and implicity of the content which you created. G bless U
Dude you're awesome. I'm trying to become a cs major and your videos help me out so much!
Simple, informative, easy to understand
Very good tutorial. Quick but also full of information. I like it that it isn't so slow that you can fall asleep. It motivates to stay in focus. :D
Jacob Sorber's contents are just amazing.
And that's how I understood linked list! Thanks a lot for the clear and concise explanation brother, keep the good work ;)
First time working with linked lists, this introduction felt really good!
Thank you sooooooo much for providing such a high quality content for free on youtube
Thank you very much for the video. Revised Linked list in 18 min. I have my interview tomorrow.
Super effective and just what I need. You are my favourite teacher from now on.
Thanks! Let me know if there are topics you want to hear more about.
I wish I could learn this much thing every 18 minutes in my life
Very good explanation. Thank you!!!
Thank you for this awesomely clear tutorial !
You're very welcome.
thank you very much , your videos are so simple to understand yet so enriched with information and well explained details
i tried to save a linked list and to save in a binary file then reading it but i struggled a lot if make a video about this topic that would be great !!
That sound while typing is super cool!
Thank you so much, Sir! That was a great video!!!!
Thank you!! This video helped me so much
One cool trick with linked list and arrays is instead of having a really long array, or a really long list, you have a linked list of pointers to multiple arrays. That way you can easily sort values into arrays without a single one getting too large.
That's a trie, isn't it?
very good video! very easy to understand
THE FIRST 30 seconds!! you called me out majorly lol. I was speaking with my prof about some confusion on an assignment (I'm a senior) and he said "well linked lists are something you know already from your intro classes so that part should be easy" I immediately clammed up out of embarrassment and now here I am. Thank you for making this video.
thanks for explaining all of this so succinctly
You're welcome.
what an underrated channel, thanks!
You do a great job! Thanks.
Thank you very much, your video helped me a lot
Thanks for sharing, bro!😄😄
Please make more videos on data structures. Your videos are very easy to grasp. Thanks.
Thanks. I posted one today, and have a few more planned.
you are awesome man really love the explanation thanks a lot
this is helpful and all but you don't have to fast forward; it makes it really hard to keep up with what you're doing
Awesome explanation! Subscribed!
Thanks and welcome
Honestly this explain is better then my college professors but you code so fast! Thank you for explaining this better!
Thanks. Glad it helped.
You forgot to free up the dynamically allocated nodes.
The video was really helpful.
This is awesome!
Pretty neat!
Thank you
You're welcome. Glad you enjoyed it!
Thank you so much !! I didn't know how to manipulate my *head pointer well to find a node in my list for inst. This was so confusing but now i know better thanks to you :D
You're welcome. Glad I could help.
thank you very much. It is really helpfull
Hey, Jacob. Thanks for touching the structures. Tell us about more specific or less used structures as pyramid or quadtree. That would be great.
I agree, it can be really nice to have some videos about less common data structures.
very helpful, thanks
Simplest and clear singly linked list tutorial, I have seen till now. Cheers.
Brilliant tutorial, thanks a lot!
You're very welcome!
Very nice tutorial
Thanks, i would be awesome if your channel were there during my college :)
That was super helpful...:)
I swear, this video better get 500k views at least.. mans explaining with ease
Thanks, Mauro! I'm glad you liked it.
love it thanks, could even build trees with this
Sir, Thank you.
thanks bro it was really help full for me
You're welcome. Glad it helped
Amazing!!
dang your keyboard sounds really good.. Also thanks for the java piece
Great video.
i swear to god literally make 3-4 hour long ASMR videos of you just coding whatever with that keyboard guaranteed 2 million views
You are a beast at coding man, I'm a student at the school 42, I need to learn this data structure quickly for a project
Thanks. Make sure you don't just learn it quickly. Learn it well. That way you won't have to learn it again in a month or two. :)
Best of luck.
You're the best man ... Can you please make a video on struct node** head_ref and struct node* head_ref ? I'm just confused with double pointers in linkedlist.
Beautiful!
Thank you computer science Matthew McConaughey! This saved me on my project.
Thanks for the vid!
You're welcome. Glad I enjoyed it.
Awesome!
Thank you so much!!
You're welcome.
The pointer to the first node in the list is passed by value, so you don't need the temporary variable to print the elements in the list.
You are right. I tested it and had the same results
Thank you very much for the wonderful explanation. I would to add a function to free memory after we have used it.
void free_list(node_t *head)
{
node_t *tmp = NULL;
while (head !=NULL)
{
tmp = head; // Store the current head to tmp
head = head->next; // Move to the next node
free(tmp); // Free the current node
}
}
Hairless Matthew McConaughey just taught me a lot about coding. Thanks :3
I like that you are one of the only I have seen that type at the same speed as me
😂
@@JacobSorber I ask if you ever considered using rust instead of c and c++? In a comment on another of your videos. Just interested because i come From a language theory perspectiv so it is fun to hear the what you thought about it.
one of the best videos about linked lists. enjoyed it although i'm not new to this topic. would've liked a little bit big-o-notation though.
and - some addition to the still outstanding content - i think calling them 'chains' instead of lists would be more intuitive.
Thank you for the video. I do have to say the portions where you actually write code are simply too fast for me. I am aware I can pause but I might have to pause every 2 seconds at some parts which gets tedious quickly.
I really like the way you explain. Being a C developer and given the fact that linked-lists were uncharted areas for me, i found this really helpful.
In fact i fixed a bug in a piece of code at work that i had implemented. :)
It would be really interesting to see free memory malloced for the nodes, once you're finished with linkedLists work.
Thanks. I'm glad it was helpful.
I don't completely understand your request, though. Are you wanting to see how memory allocators work? Or are you looking for some variant on what I did here with my linked list?
@@JacobSorber actually a variant. You could show how the allocated memory can be freed, once the work with linkedlist has been completed. I would also typecast those mallocs like (node_t*)malloc since they return void* by default. :-)
Great video
Thanks, Mike.
sir i look first 3 minutes of this video and l i love you and yor channel thank for sharing your knowledge 🖤🖤🖤🖤🙏🏻🙏🏻🙏🏻🙏🏻
Thanks and welcome
🔥🔥 Dope intro
Thanks.
I'll say something & probably will get lambasted, I've been through 10 to 20 tutorials on DSA. I search DSA through C/C++ on TH-cam and hundreds of subpar, half-arsed tutorials of incompetent people ( who possibly don't even know what they're doing ) pops up and it's so annoying because not only you've a problem that require DSA comprehension but now you also have another issue of finding a decent resource. I'm glad I found this channel amid heaps and piles of trash.
Thank You!
Welcome! Glad you found my channel.
@@JacobSorber ♥️
probably the only programming tutorial out there that has to be slowed down(playback speed!)
Very good !
Thanks.
@@JacobSorber welcome.
I'm not sure if this is that best way to handle this, however in the video there was no code on adding a node to the end of the list so I came up with this. Where you pass in the head of the list and the create_new_node function. ex. insert_at_end(head, create_new_node(55));
void insert_at_end(node_t *head, node_t *newnode){
node_t *tmp = head;
while(tmp->next){
tmp = tmp->next;
}
tmp->next = newnode;
}
@4:20... Jacob's Ladder 🤣🤣
Very nice explanation of linked list. Thank you very much! Do you have a public repo with this example?
Thanks. I'm glad it helped. Source code is available via Patreon. More info in the video description.
8:45 yes, I am indeed enjoying this video😁
could you make a video where a linked list had various data types in a single node? Also could you show various ways of driving the code besides the ones in this video... for example what if i want to populate the node via command lines args or via scanf? And also could you explain writing function with pointers and so on, like functions that take struct pointers in.
Subbed!
Welcome! Thanks for the support.
This is a bit meta, but how do you feel about approaching data structures from different angles, prog lang wise? This is a bit early for me (still undergrad), but I really enjoy teaching so far and am thinking about how I'd approach this myself. For example, I didn't really get the utility of sum types until I looked at how much simpler they make implementing binary trees.
the sound of keyboard is awesome
Glad you liked it.
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