Reverse Sublist in Linked List | (Reverse Linked List II on LeetCode) Explanation

[@JyotinderSingh]

Count the number of times I said "essentially" in this video :P

[@staffeng]

Loved the way you named your variables! Half the battle in understanding is won right there.

[@JyotinderSingh]

Hahaha yes I do like to keep my variable names descriptive! Thank you, and be sure to subscribe for more content!

[@engineeringflix]

very welll explained....

[@yashsaini3331]

Best Explanation on the internet. Thanks a lot man!

[@susmitapatro8720]

After spending hours on this problem, i finally understood because of your explanation . Thankyou :)

[@JyotinderSingh]

Glad you understood the concept! Be sure to subscribe for more videos!

[@pythonenthusiast9292]

hey man , your explanations are so good and voice is quite clear as well. I see you are not making videos currently . I really hope you start it whenever possible cause these are for sure very helpful. cheers

[@JyotinderSingh]

Hi! Thanks a lot for the feedback! Yes, I've been taking a break for the last couple of months due to work commitments, but I plan on making new videos very soon! I'm currently exploring different things that I'd like to make more videos on, other than LeetCode :) Again, thanks for the support!

[@rajeshkilladi7124]

Thank you so much for the explanation❤, simply get the whole concept within the first 5 min, for those guys who are checking the comments whether to watch this video is simple, go for it.

[@MayankLC93]

What a crisp explanation.... !!! thank You :)

[@EmiNBega]

Got stuck on many paid Udemy courses explaining Linked lists, but you definitely nailed it! Nice visualization and explanation, also a variable names are incredibly meaningful in understanding this algorithm! Big like!

[@itsninja709]

its showing null pointer exception for this line at 15:58 as nodetobeextracted is null. plz help.

[@indranilthakur3605]

Awesome explanation. Though I code in Java, your explanation was the best I could find and understood it properly. thanks

[@JyotinderSingh]

Glad I could help! Be sure to subscribe for more upcoming content! ♥

[@radhikadube7360]

your explanation is remarkable, literally I have no words...... superb Plzzzzz upload more videos

[@saranyavivekanandan9044]

Amazing explanation! The best part is the diagram you drew.

[@JyotinderSingh]

Thank you so much! I'm glad you found this useful, please consider subscribing for more content!

[@samolusola]

@@JyotinderSingh great video. What software do you use to draw and present at the same time?

[@itsninja709]

its showing null pointer exception for this line at 15:58 as nodetobeextracted is null. plz help.

[@govindmall4731]

you are amazing, your code is very explanatory ...

[@dwivedishashank9]

Thanks man. Will be using variable names going forward :)

[@alkadas4094]

Just loved the variable names...It became damn easy after that to undersatnd

[@JyotinderSingh]

Glad you liked it! Be sure to subscribe for more videos!

[@danielnzuma9070]

Thanks for the great insight had trouble understanding this In addition we need to add a dummy node (sentinel) to cover for scenarios where we need to reverse from the head of the linkedlist

[@adityachauhan1182]

Excellent !! Using diagram and name of pointers you have turned this hard concept into soo easy to understand !! Thanks

[@JyotinderSingh]

These comments make my day! Please consider subscribing for more content!

[@adityachauhan1182]

I am preparing for my internship will you give some suggestions ?

[@JyotinderSingh]

Sure, feel free to email /DM me about any specific thing you wish to ask. I'll try my best to help! My social media is linked on my profile

[@adityachauhan1182]

@@JyotinderSingh Can you provide me your LinkedIn account ?

[@JyotinderSingh]

www.linkedin.com/in/jyotinder-singh

[@shoaibhossain4545]

Thanks for this video, made things a lot easier for me. Great Job!!

[@ankitpaudel8901]

Amazing Explanation Brother all there were n doubts at all.

[@ismailhassaballa6948]

Wonderful visualization and explanation! Thank you a lot!

[@cantseeme101]

This was a great explanation, mate!

[@shrutipriya4848]

thank you thank you so much your explanation was the best

[@RituJain-qu6sf]

Amazingly amazing explanation. Understood in one go :D

[@JyotinderSingh]

That's so great go hear! Please consider subscribing for more videos!

[@Ankit.yt_885]

Very Nice Explanation!

[@giorgikhachidze64]

Great explanation! Only question is, why did we have to create dummy list? Why couldn't we do it with existing list?

[@rajendrabrahmbhatt2585]

hi, do we always need to have dummy node? I am trying without using dummy but it does not seem to work. Could you please help?

[@furryna482]

The simplest solution I found ngl Really helpful!

[@itsninja709]

its showing null pointer exception for this line at 15:58 as nodetobeextracted is null. plz help.

[@hardikmittal4746]

if instead of nodeToBeExtracted->next=nodeBeforeSublist->next if we write nodeToBeExtracted->next=workingPtr why is it not working as nodeBeforeSublist->next is pointing to address of workingPtr

[@JyotinderSingh]

WorkingPtr will only be equal to nodeBeforeSublist->next for the first iteration, after that the workingPtr will be further ahead in the list with other elements between itself and nodeBeforeSublist. I hope this clears it out, otherwise look at the second iteration in the demo I give in the video, you'll see that there is another element between workingPtr and nodeBeforeSublist once the first element has been 'cut & pasted'.

[@047gauravkumartiwari5]

Very nice explanation. Thanks a lot.

[@JyotinderSingh]

Thank you!

[@penchaldas7253]

awesome explanation!

[@akshitvashishth5481]

Amazing approach! Thanks :)

[@JyotinderSingh]

Glad I could help! Be sure to subscribe for more content!

[@vinothiniseenivasan1502]

brilliant explanation and naming variables ... thanks a lot

[@itsninja709]

its showing null pointer exception for this line at 15:58 as nodetobeextracted is null. plz help.

[@pateladarsh1463]

big appreciation for this !!

[@michaelphan7477]

Whats the point of the dummy pointer? Still don't understand

[@michaelphan7477]

can't you just return head at the end?

[@JyotinderSingh]

Hey, I'm glad you asked. This is a common design pattern while working with linked lists in cases when you need to return a new list. The idea is that you always want dummy.next to be the head node. Think of examples when your head might be null, the dummy allows you to keep track of that node. This is also useful in cases when you need to perform some other tasks, such as rotating or reversing a list, when you need a pointer to the previous element of your current node (and your current node might be head itself). The point is, you can probably get by without using a dummy node as well, because there's always more than one way to do something. But it's a helpful pattern that you'll realise is adaptable to a lot of problems. I hope this helped!

[@michaelphan7477]

@@JyotinderSingh ahhh ok that makes a lot of sense. thank you. so basically for this probably you don't really need a dummy pointer.

[@JyotinderSingh]

Glad I could help! Be sure to subscribe for more content!

[@briangorman3511]

The dummy pointer is used to handle the case where the sublist is at the start of the list

[@AbhinavKumar-dr4ef]

Krishna bless you. Nice explanation.😊

[@Abhishek-ie4mm]

Superb explaination.... Thanks man...

[@JyotinderSingh]

Glad I could help you understand the concept! Please consider subscribing for more videos!

[@ujjawalgupta23]

Awesome explanation Bhai!!

[@saharshithasa]

Fantastic explanation

[@JyotinderSingh]

Thank you! Please consider subscribing for more videos!

[@saharshithasa]

@@JyotinderSingh sure

[@manjotkaur6731]

Very good explanation sir

[@JyotinderSingh]

Thank you! Be sure to subscribe for more content!

[@bittudwivedi6536]

Thanks for the good video

[@piyushmanaswi7470]

could you please explain the need of dummy pointer and its usecase?

[@govindmall4731]

because you can't change directly the main head of the linked list... that's why he has taken the dummy pointer...

[@keshavgaur4535]

Thank you so much

[@barnabasbabatunde5454]

Very helpful. Thanks

[@JyotinderSingh]

Thanks a lot! Be sure to subscribe for more content!

[@savagebeaztpeace8390]

this is insightful, thanks!

[@AvikNayak_]

Damn! what an explanation !!

[@JyotinderSingh]

Glad you were able to understand the concept! Be sure to subscribe for more videos!

[@diksharajput4638]

Amazing explanation thanks a lot 😊

[@JyotinderSingh]

Glad you liked the video! Subscribe for more content!

[@ishaanshrikantkulkarni4660]

amaing explaination!!!

[@ManojDohale-q6o]

I liked the explanation sir, but it will be better to understand if you keep the variable name a little bit shorter (without compromising the meaning) Thanks for this awesome content

[@itsninja709]

its showing null pointer exception for this line at 15:58 as nodetobeextracted is null. plz help.

[@100_bindusai8]

Amazing 😊🤩

[@JyotinderSingh]

Thank you! Be sure to subscribe for more content!

[@ayushvats1808]

please someone clear this in loop our working pointer needs to be updated na.. with just start++ how our working pointer is getting updated..

[@JyotinderSingh]

Hey, if you look at the whiteboard explanation, you'll see that we never really update the workingPtr. It always points to the same node (with value 3 in our example). The only thing that changes is the next pointer of the workingPtr, which we do update in every iteration of the loop. Hope this clears it up

[@AvikNayak_]

Can you do a video on Rotate Array,Next Permutation,Product Of array except self ?

[@JyotinderSingh]

Hey, sure. I'll try adding those :)

[@anikkhan8811]

You are gem bro :) Thanks would be such a small word for ya!

[@JyotinderSingh]

It really means a lot! Thank you!

[@anikkhan8811]

@@JyotinderSingh My pleasure bro 😀

[@techenthusiast127]

Thank you so much!

[@muditkumarsingh7627]

pretty well solution :))

[@JyotinderSingh]

Thank you! Be sure to subscribe for more content!

[@GauravSharma-wb9se]

Whole logic sit at you dummy pointer, I tried this problem with reversing sublist then join likns properly but for 2 elements it got failed, but after seeing your video I got idea of dummy node.

[@ishaankulkarni49]

how on earth am i supposed to come up with this?!

[@shouryagupta8763]

wow