I do not understand anything about coding, but the way this mysterious gentleman stated everything, I was completely hooked up seconds by seconds till the end. I guess some peoples do have some extraordinary quality of teaching. Thanks Savjee
Tauw heed it’s that you actually care about learning about blockchain. Trying watching a video on programming a microwave keypad. Much less interesting lol
Savjee, I have finally been compelled to subscribe to a youtube channel. As an 'old dog' programmer, you have got me moving on blockchains more than the dozens and dozens and dozens of articles I have read. For a 'show me' programmer, this is just what the doctor ordered and I thank you for taking to the time to share your knowledge and for doing such an easily understood walk-through. Well done young man...
Great video. I'm a programmer so this made a lot more sense to me than watching someone try to describe how the blockchain works in a spoken presentation!
For my internship, I was recently requested to do a simple web3-based project. This is what I've decided to use. Thanks for this project and for being a great teacher😁
Great tutorial, thank you. I was "playing" with your code and i've just discovered that changing the "Genesis block" (block 0) attributes is possible (the chain stays valid). This is due to the "isChainValid()" method; as you can see, the method has a "for(var i = 1; i < this.chain.length; i++){ [...]" which starts from "i = 1". This means that no controls are applied to the first block (data can be changed without any problem). A simple work-around is to change the "for([..])" loop (make it starts from "i=0" and check the previous block only "if(i>0)"). Thanks for your time and knowledge
Exactly! Over all those explanations online which doesn't provide any example, I can finally understand the base concept of a blackchain after watching this video, thank you soooo much. Autosubs
Oh man, after watching heaps of videos on bitcoin, etherium and block chain. This is the first time I really got my head around only because we think in terms of code. Love you for that.
@@joeysipos if(currentBlock.hash !== currentBlock.calculateHash()){} TypeError: currentBlock.calculateHash is not a function : thats the error I got, not sure why it is function
Very well done video. Steady pace, clear code, and an engaging voice. The blockchain just became a whole lot less intimidating and mysterious, so thank you.
I swear, this is the video finally where I really understood the concept of Blockchain. I have watched many videos but was getting just repetitive things time and time again. Thank You very much. I have like and subscribed to you channel.
Thank you for sharing this. Today I decided to learn about blockchain. I hope I can learn enough to produce something to help make our world a better place.
Major in Law but I think this guy has successfully guided me through the jungle of IT and let me know a little bit of how Blockchain are created and its security mechanism
Great observation!! It is similar to a Singular Linked List data structure With one massively important improvement namely: O(1) (i.e constant time access) to all blocks in the chain, via the top-level array.
@@SatyamGupta-gc9sq Nope, you're INCORRECT!! Please revisit the source code - it is quite clear. The presented Block Chain data structure has more commonalities with a SINGULARLY Linked List, NOT a doubly linked list as you have attempted to suggest. Whilst I agree that the structure does indeed store reference to the previous node (i.e its parent) it DOES NOT *DIRECTLY* store reference to the NEXT node. Thus it's essentially a singularly linked list in reverse.... But STILL a singularly linked list nonetheless. Source: myself lol. I've actually built these types of core data structures (i.e Singularly/Doubly linked lists, Binary Search Trees, Balanced Binary Search Trees,Tries,etc) from scratch in numerous languages and have a deep understanding of matters pertaining to their. respective implementations,trade-offs, time-space complexity,etc
@@slavento yeah using dark theme in bright light environment is not good. Dark theme is perfect for only dark environments. And light theme is good for brighter environments
I've watched too many videos to understand what a blockchain is and none of them seemed to help, but this video clears things up in my head about blockchain, Thanks
These hands-on turorials really come in handy to grasp the blockchain concepts. There's this scenario where tampering the data of the final block in the chain will lead to the block getting invalidated due the mismatch of the hash generated post-tampering with the existing hash of the final block. So, this will prompt a "false" in the chain validation. But, if we recalculate the hash after tampering with the data (only for the final block), it prompts us the chain being valid since the hash has been regenerated (modified after the hash mismatch). Thus the validity of the chain turns out to be "true" which is sort of a glitch from the blockchain conceptual perspective, but is correct from the logical point of view
Hey! Thanks for the great content! One question: why didn't you generate block's index and timestamp on a fly in the constructor? Is there any reason for passing them on instance initiation?
hello, has this improved your knowledge of java and blockchain? have you made any progress on creating a blockchain? i would like to talk with somebody who might be able to help me script a source of a new blockchain
Great! I was learning blockchain but with a traditional school teaching for weeks and I didn’t understand nothing but with your videos I completely hooked up great and very simple way to learn thanks and appreciate to share your knowledge ❤
If you're really serious, I would switch your desktop from Windows to Ubuntu Desktop (free) or run Ubuntu in VirtualBox (free). Windows and Node/Javascript don't play well yet, there are still lots of problems with file names and stuff. The windows guys I work with are always having problems, the people on the *Nix/Mac system dont have these problems ever. I'm not saying Linux/Mac is better than Windows, just saying that for now JavaScript is better on Linux/Mac. They my fix it soon.
Amazingly explained! I really didn't know anything about Blockchain. After watching this video, I was like "wow, this guy is amazing!". You did it so nice Savjee! Thanks a lot!
would implementing some of those other features such as "proof of work/ stake", check of funds, ability to prevent tampering of data / rollback function be possible to demonstrate in another video? It would be greatly appreciated.
Not to mention P2P network consensus and transaction broadcasting. I sometimes think writing your own blockchain is just as ambitions as writing your own OS. Maybe it is just easier to take to bitcoin code and adapt it to your needs.
Yeah the actual source code is the best option when you want to understand the more complicated aspects of merkle trees, nonces, unconfirmed transactions, and memory pools. But this is an extremely good generic intro on the fundamentals !!!
You are a great teacher, Mr. X! Thankfully, I do not have to write this code but I needed to understand blockchain for my graduate class. This video finally made it all click! (I watched your other one before this too and that was helpful as well.) Keep up the great work and thank you for sharing it for free!
Great video. Congratulations. I have a question though, in the example, I tried to tamper data and did recalculation of current hash and assigned to existing hash. I got output as true. We are not tampering anything with previous block hash. Basically I have not understand the check on current block hash with the previous block hash as for me it always return true. Also if I carefully watch video , when you do a tampering and set current hash. It gives output as false. However if I examine your console which is on this video, both previous hash and current hash seems to be identical. Then how does it return false? Thanks Matty
when isChainValid loops and checks the block that is right after the one you changed, its previous hash will not match that preceding block's new hash that you had calculated
Noticed this video on my recommendation and in 15mins understood the basics of blockchain… most importantly the simple and powerful sample you showed👍🏻👍🏻👍🏻
Awesome intro, I think you should make this a series so that people can make their own full blockchain using your details. When is the next video coming??
+Amit Yadav Great idea! Next stop would be to discover smart contracts. Definitely will work on that in the future. But first I need to finish another course ;)
+Amit Yadav Great idea! Next stop would be to discover smart contracts. Definitely will work on that in the future. But first I need to finish another course ;)
Wow.. Thanks, Sanjeev for this video. I`ve been searching for something to enlighten my brain with what`s actually Blockchain is. Finally, you did it... Thanks man
Thanks for the great tutorial. There are lots of videos describing how blockchain works, but only a few that give some technical example(s). Among those few, this video stands out really well. For those who are new to blockchain (e.g. me), this video is really enlightening.
Wow, amazing job man. I've only covered the basics of Javascript yet your explanation of every part of your code made everything so clear. Your name really does suit the quality of your content. Thanks a ton man!
First time Im seeing Javascript and coding and just learning about blockchain - I understood it. Lets mint this video :) ah and this is my first youtube comment ever
Wonder I didn't come across your page months ago. Not just for this particular video but the quality and the clarity in all your videos are amazing. Huge fan!!
This is so strange. I have watched tons of videos on blockchain and as a programmer it took watching this video in code language for this to be fully understood. Hilarious that english seemed more obtuse than pure javascript code to explain this concept. I even can now extrapolate how to write a code for correcting a chain after a change (iterating with a method that will match various tags ie timestamps etc) and also even how a proof of work might function. Great video I think aimed directly at coders.
If you want to follow this tutorial First run "npm init -y" to initiate a node js project. Then in your package.json add "type": "module" If you don't do this the code won't run. It took me a whole year and a half to solve the issue.
Thanks Brother....you have pushed me in right direction. I was reading, watching many videos on Block Chain, but your Javascript example cleared lot of ideas. Thanks again. May I tell you, I have used many a times timestamp & date to create a unique ID for various databases. That concept has been expanded into something massive. Great work....
Really a great video . Finally i got the point of blackchain . I had a lot of doubt regarding the implementation. The video gave an insight of the concept . Really a great work .
Thank you very much, I think this is absolutely the best way how to explain how blockchain works (assuming one knows javascript or other similar language).
I 100% agree with all of the positive comments. This was explained so cleanly and clearly, in perfect sequence. Thank you so much for making learning the fundamentals of blockchain so simple :)
Ive no idea how to code, but I mine and I wanted to understand a bit better. Thanks. For me it was the simplest example I watched and now understand it a bit better.
This was such a great video. I was amazed that you didn't make one error in your coding as you were going along, and you were "explaining" the whole time which was like watching some kind of super-human! Unbelievable coder!
Hehe, thank you! But I won't lie, this was well prepared in advance, so that makes it easier ;) I can't think, code and explain like this on a daily basis.
This explanation is so solid! Like others said in the comments, this is what made me get it. I sortoff knew but this made the click and will make it much easier for me to explain it myself in the future. Thanks!
Thanks a lot. Very helpful. Good video to start with when learning blockchain technology, and narration is good too. The BASICS seem SIMPLE; build a constructor and hash it then, link each instance like nodes, loop through the nodes, do some logical statements for validations, have the chain stored on local computers, and there you have it. I think. Please let me know.
brilliant video, once i saw the code, i learned much more than they teach you in any other videos trying to explain blockchain using stupid powerpoint presentations
this guy the only guy on utube as a teacher whi hasnt made me sleep. or fumble or waste time. just bammmmm. u know its right and good but soooooo many questions. lol. k im donee
But how is it stored? How does each user store the infinitely growing chain of blocks? Every user must have a copy of the block chain going back to the genesis block. In order to participate in that block chain they must store the entire thing? What if the chain has grown into the millions?
Right now the growth is still manageable because storage capacity is still increasing. Different solutions have been proposed for the long term like pruning the Blockchain (removing fully spent transactions) to partitioning the Blockchain into multiple parts.
Great video. Just to double check my understanding, the reason you start isChainValid on [1] not [0] is because there's no previousBlock.hash and you'll get a false so the genesisBlock is being validated? Did I get that right? Thanks.
![BLACK BAG - Official Trailer [HD] - Only in Theaters March 14](http://i.ytimg.com/vi/Du0Xp8WX_7I/mqdefault.jpg)
I do not understand anything about coding, but the way this mysterious gentleman stated everything, I was completely hooked up seconds by seconds till the end. I guess some peoples do have some extraordinary quality of teaching. Thanks Savjee
Tauw heed it’s that you actually care about learning about blockchain. Trying watching a video on programming a microwave keypad. Much less interesting lol
Agreed!!
@@ViralVeediuh true
Same here
SAME.
Savjee, I have finally been compelled to subscribe to a youtube channel. As an 'old dog' programmer, you have got me moving on blockchains more than the dozens and dozens and dozens of articles I have read. For a 'show me' programmer, this is just what the doctor ordered and I thank you for taking to the time to share your knowledge and for doing such an easily understood walk-through. Well done young man...
Thanks a lot! Reading your comments made my day!
Great video. I'm a programmer so this made a lot more sense to me than watching someone try to describe how the blockchain works in a spoken presentation!
After +1 year of courses, projects documentation and tutorials I could finally understand how Javascript classes work thanks to this video. Thanks!
Keep Walking, now you start Easily understand everything else.. Everything will Open to you.. ;))
For my internship, I was recently requested to do a simple web3-based project. This is what I've decided to use. Thanks for this project and for being a great teacher😁
Great tutorial, thank you.
I was "playing" with your code and i've just discovered that changing the "Genesis block" (block 0) attributes is possible (the chain stays valid). This is due to the "isChainValid()" method; as you can see, the method has a "for(var i = 1; i < this.chain.length; i++){ [...]" which starts from "i = 1". This means that no controls are applied to the first block (data can be changed without any problem).
A simple work-around is to change the "for([..])" loop (make it starts from "i=0" and check the previous block only "if(i>0)").
Thanks for your time and knowledge
So much information fit in this 15 minutes and this finally made blockchain click in my head. Thank you for this!
Yes! Really helpful video! Thanks!
Especially the explanation of difficulty and nonce.
Exactly! Over all those explanations online which doesn't provide any example, I can finally understand the base concept of a blackchain after watching this video, thank you soooo much. Autosubs
How can i make zsh in terminal
Same here. I think we belong to developer world. Simple words can't make us understand until read the programing logic. Hehe.
Oh man, after watching heaps of videos on bitcoin, etherium and block chain. This is the first time I really got my head around only because we think in terms of code. Love you for that.
yeah, seriously. All these explanation videos make no sense. But looking at how the code actually works make perfect sense haha.
Same here 👨🏽💻
@@joeysipos if(currentBlock.hash !== currentBlock.calculateHash()){} TypeError: currentBlock.calculateHash is not a function : thats the error I got, not sure why it is function
My gosh, in terms of covering the basic fundamentals this is an amazing intro!
Very clean explanation, and also very clean english for those who doesn't speak english natively. Thanks!
I'm not a native speaker myself, so I have to keep things simple ;)
Very well done video. Steady pace, clear code, and an engaging voice. The blockchain just became a whole lot less intimidating and mysterious, so thank you.
I swear, this is the video finally where I really understood the concept of Blockchain. I have watched many videos but was getting just repetitive things time and time again.
Thank You very much.
I have like and subscribed to you channel.
"Simply Explained" indeed ! Amazing, cleared a lot of concepts.
Thank you for sharing this. Today I decided to learn about blockchain. I hope I can learn enough to produce something to help make our world a better place.
Demystified this for me, finally! Thank you so much for making these concepts so tangible.
Major in Law but I think this guy has successfully guided me through the jungle of IT and let me know a little bit of how Blockchain are created and its security mechanism
This looks similar to linked lists in Data Structure with added security!
Great observation!! It is similar to a Singular Linked List data structure With one massively important improvement namely: O(1) (i.e constant time access) to all blocks in the chain, via the top-level array.
May i nitpick? The focus is on integrity which make it inherintly secure 😁
i was thinking the same thing
@@cazino4 yup it's linked list but not singly linked list, it's doubly linked list as it stores the adress of the previous block too.
@@SatyamGupta-gc9sq Nope, you're INCORRECT!! Please revisit the source code - it is quite clear.
The presented Block Chain data structure has more commonalities with a SINGULARLY Linked List, NOT a doubly linked list as you have attempted to suggest.
Whilst I agree that the structure does indeed store reference to the previous node (i.e its parent) it DOES NOT *DIRECTLY* store reference to the NEXT node. Thus it's essentially a singularly linked list in reverse.... But STILL a singularly linked list nonetheless.
Source: myself lol. I've actually built these types of core data structures (i.e Singularly/Doubly linked lists, Binary Search Trees, Balanced Binary Search Trees,Tries,etc) from scratch in numerous languages and have a deep understanding of matters pertaining to their. respective implementations,trade-offs, time-space complexity,etc
I know nothing about coding, but this example really made me understand what's happening with blockchains - thank you!
Damn bro, that light theme doesn't hurt your eyes?
😂😂😂😂
and the bracket on the same line with the parentheses and no space, ew
Try working in very light room...it's common to work with light theme in that case, and with dark theme in darker rooms...
@@slavento yeah using dark theme in bright light environment is not good. Dark theme is perfect for only dark environments. And light theme is good for brighter environments
Does anybody know which theme is he using?
I've watched too many videos to understand what a blockchain is and none of them seemed to help, but this video clears things up in my head about blockchain,
Thanks
Love this! Thanks so much for making this tutorial, really helps a non-techie like me get under the hood of blockchain!
there were a few genious on algorithm n coding, but i think you one the best amid them....simple n clear
Subbed , you brought tears to my eyes.
exactly. That's why dark theme *is better*
These hands-on turorials really come in handy to grasp the blockchain concepts.
There's this scenario where tampering the data of the final block in the chain will lead to the block getting invalidated due the mismatch of the hash generated post-tampering with the existing hash of the final block. So, this will prompt a "false" in the chain validation.
But, if we recalculate the hash after tampering with the data (only for the final block), it prompts us the chain being valid since the hash has been regenerated (modified after the hash mismatch). Thus the validity of the chain turns out to be "true" which is sort of a glitch from the blockchain conceptual perspective, but is correct from the logical point of view
Hey! Thanks for the great content! One question: why didn't you generate block's index and timestamp on a fly in the constructor? Is there any reason for passing them on instance initiation?
hello, has this improved your knowledge of java and blockchain? have you made any progress on creating a blockchain? i would like to talk with somebody who might be able to help me script a source of a new blockchain
Great! I was learning blockchain but with a traditional school teaching for weeks and I didn’t understand nothing but with your videos I completely hooked up great and very simple way to learn thanks and appreciate to share your knowledge ❤
How can I download the library on Windows? Because on windows the terminal is working with powershell
same problem here
did u solved ?
@@AbdulAhad-ni4hq same probleme :(
use bash instead :)
You need npm installed.
If you're really serious, I would switch your desktop from Windows to Ubuntu Desktop (free) or run Ubuntu in VirtualBox (free). Windows and Node/Javascript don't play well yet, there are still lots of problems with file names and stuff. The windows guys I work with are always having problems, the people on the *Nix/Mac system dont have these problems ever.
I'm not saying Linux/Mac is better than Windows, just saying that for now JavaScript is better on Linux/Mac. They my fix it soon.
Amazingly explained! I really didn't know anything about Blockchain. After watching this video, I was like "wow, this guy is amazing!". You did it so nice Savjee! Thanks a lot!
would implementing some of those other features such as "proof of work/ stake", check of funds, ability to prevent tampering of data / rollback function be possible to demonstrate in another video? It would be greatly appreciated.
Not to mention P2P network consensus and transaction broadcasting. I sometimes think writing your own blockchain is just as ambitions as writing your own OS. Maybe it is just easier to take to bitcoin code and adapt it to your needs.
@Sophie, do you want a complete implementation? Just read the source code for Bitcoin or Ethereum...
Yeah the actual source code is the best option when you want to understand the more complicated aspects of merkle trees, nonces, unconfirmed transactions, and memory pools. But this is an extremely good generic intro on the fundamentals !!!
You are a great teacher, Mr. X! Thankfully, I do not have to write this code but I needed to understand blockchain for my graduate class. This video finally made it all click! (I watched your other one before this too and that was helpful as well.) Keep up the great work and thank you for sharing it for free!
Great video. Congratulations.
I have a question though, in the example, I tried to tamper data and did recalculation of current hash and assigned to existing hash. I got output as true. We are not tampering anything with previous block hash. Basically I have not understand the check on current block hash with the previous block hash as for me it always return true.
Also if I carefully watch video , when you do a tampering and set current hash. It gives output as false. However if I examine your console which is on this video, both previous hash and current hash seems to be identical. Then how does it return false?
Thanks Matty
Did you put the return true statement in the body of the for loop?
I am having the same exact problem now. Did you manage to solve it?
when isChainValid loops and checks the block that is right after the one you changed, its previous hash will not match that preceding block's new hash that you had calculated
Noticed this video on my recommendation and in 15mins understood the basics of blockchain… most importantly the simple and powerful sample you showed👍🏻👍🏻👍🏻
13:02 Blockchain is like "Mr.Stark...I dont feel so good..."
The first video about Blockchain that I actually understood
Awesome intro, I think you should make this a series so that people can make their own full blockchain using your details. When is the next video coming??
+Amit Yadav Great idea! Next stop would be to discover smart contracts. Definitely will work on that in the future. But first I need to finish another course ;)
+Amit Yadav Great idea! Next stop would be to discover smart contracts. Definitely will work on that in the future. But first I need to finish another course ;)
Amit Yadav how can i make zsh in terminal?
Simply Explained - Savjee Heyy any luck with making those blockchain courses
You could use for(var i in smth) instead of for(var i=1;i
Yep that's right but then I would need to keep a reference to the previous block.
it's will be great if you create a. video about smart contracts
That's a nice idea! I'll definitely consider that!
yeah pls do that and can u include dates in smart contracts for tokens to be distributed only during that time?
+Python_Tutorials Great idea! I'll think about how to implement that :)
great,thanks a lot and we would love to wait for that video
WORD!
Wow.. Thanks, Sanjeev for this video. I`ve been searching for something to enlighten my brain with what`s actually Blockchain is. Finally, you did it... Thanks man
great video. subscribed!
You simply explained and I simply subscribed. This is what I was searching for as I don't knew any implementation of blockchain. thankyou
Really great, that sparked a great idea in my mind! :) (y)
Thanks for the great tutorial. There are lots of videos describing how blockchain works, but only a few that give some technical example(s). Among those few, this video stands out really well. For those who are new to blockchain (e.g. me), this video is really enlightening.
It's a great explanation video of Blockchain.
Can you tell what IDE you are using 0.0 Cuz i really like the UI , thanks
Hafrn The Grey white edition ;)
Press ctrl k + ctrl t, and select the quiet light theme :)
Why some one can dislike this video ? There is nothing to dislike, unless you wanted to see movie and endup watching coding video! LOL
Clear coding style makes a complex concept to be so easy that everyone can understand! Amazing...!
Wow, amazing job man. I've only covered the basics of Javascript yet your explanation of every part of your code made everything so clear. Your name really does suit the quality of your content. Thanks a ton man!
Thanks for the kind words! Makes my day ;)
Finally understood how magic internet money works. Awesome video!
First time Im seeing Javascript and coding and just learning about blockchain - I understood it. Lets mint this video :) ah and this is my first youtube comment ever
This is amazing. I dont even do Javascript (just php) and i understand what you're saying. Great vid.
Wonder I didn't come across your page months ago. Not just for this particular video but the quality and the clarity in all your videos are amazing. Huge fan!!
so so helpful, I can't believe all that happened in 15min. Love it. Please keep it up
Very intuitive way to explain about blockchain. Thumbs up!
Explaining it in code makes blockchain technology so much easier to understand. Thank you for this! Great job!
This is so strange. I have watched tons of videos on blockchain and as a programmer it took watching this video in code language for this to be fully understood. Hilarious that english seemed more obtuse than pure javascript code to explain this concept. I even can now extrapolate how to write a code for correcting a chain after a change (iterating with a method that will match various tags ie timestamps etc) and also even how a proof of work might function. Great video I think aimed directly at coders.
Fantastic!!! What an explanation! it just makes you understand the whole thing in one video!
If I modify the latest block (index = 2 instead), then recalculate its has => chain is valid now! so how to prevent this
Wow! This explanation demystified the whole concept of blockchain . Thanks 😊👍
Best block chain explanation video so far I've seen
If you want to follow this tutorial
First run "npm init -y" to initiate a node js project.
Then in your package.json add "type": "module"
If you don't do this the code won't run. It took me a whole year and a half to solve the issue.
Thanks, I had the theoretical understanding of what a blockchain was before, but seeing it explained this way makes everything much clearer.
The best beginner level blockchain tutorial.
This is so easy. For all the noise this "technology" has made. I am impressed how fundamentally basic is the idea itself.
Thank you so much, Sir. You just make the whole concept of blockchain sys clear for me in just under 15 mins.
for the first time in life i have watched the whole info stuffed youtube video in one go. keep it up man!!
what will happen if the chain is not valid? you wrote that it should return false, but what will happen in the real life block chain?
i watched the whole thing ,didnt understand anything but it was fascinating
ure a genius
Thanks for your video
Great tutorial to start with
Just to add, you can recalculate all hashes after you tamper with a block which should return that the chain is valid
Clarity by far the best tutorial i have ever seen
simply explained a complex code. Love this video
Thanks Brother....you have pushed me in right direction. I was reading, watching many videos on Block Chain, but your Javascript example cleared lot of ideas. Thanks again. May I tell you, I have used many a times timestamp & date to create a unique ID for various databases. That concept has been expanded into something massive. Great work....
Best and simple way to understand the core concept of blockchain . Nice job ...
Clutch video. Excellent explanation of block chain. So much simpler of a concept than when you just hear it explained.
Wow very simple explained ! thanks sir you are save my life!
Watching this in 2020 and its broadens my programming knowledge. Thanks!
Really a great video . Finally i got the point of blackchain . I had a lot of doubt regarding the implementation. The video gave an insight of the concept . Really a great work .
Thank you very much, I think this is absolutely the best way how to explain how blockchain works (assuming one knows javascript or other similar language).
This is a top notch video mate. Tomorrow I’ll get started.
Really great video , wish i had this guy teaching me programming and coding as well
Excellent 11/10. Detailed, concise and easy to understand.
I 100% agree with all of the positive comments. This was explained so cleanly and clearly, in perfect sequence. Thank you so much for making learning the fundamentals of blockchain so simple :)
Glad you enjoyed it! I would say: spread the word 😉
Simply Explained - Savjee Will do 👍🏽😁
wow! great video... I'm a low level dev and by watching the last 2 videos, really got the concept and quick application. Cool!
Not going to lie, I’m brand new to this and I have no idea what just happened here. But I liked it!
Ive no idea how to code, but I mine and I wanted to understand a bit better. Thanks. For me it was the simplest example I watched and now understand it a bit better.
Your explanation demonstrate why Blockchain and its child cryptocurrency is unstoppable & secured. Many Thanks for the code ....
This was such a great video. I was amazed that you didn't make one error in your coding as you were going along, and you were "explaining" the whole time which was like watching some kind of super-human! Unbelievable coder!
Hehe, thank you! But I won't lie, this was well prepared in advance, so that makes it easier ;)
I can't think, code and explain like this on a daily basis.
@@simplyexplained Either way, pretty impressive.
he explained in a simple matter , thank you
Had never seen a light theme that actually looks good
Also thanks for the video
This explanation is so solid! Like others said in the comments, this is what made me get it. I sortoff knew but this made the click and will make it much easier for me to explain it myself in the future. Thanks!
Thanks a lot. Very helpful. Good video to start with when learning blockchain technology, and narration is good too. The BASICS seem SIMPLE; build a constructor and hash it then, link each instance like nodes, loop through the nodes, do some logical statements for validations, have the chain stored on local computers, and there you have it. I think. Please let me know.
Love the way you explain things for a noob like me
Thanks man. This really helps understand the concept without going into too much or too little details. Exactly what I was looking for.
You gave an efficient and easy to understand intro to blockchain development. Subscribed
Glad you liked it!
brilliant video, once i saw the code, i learned much more than they teach you in any other videos trying to explain blockchain using stupid powerpoint presentations
Just amazing how you have explained this topic in a really easy way. Congratulations!!!
this guy the only guy on utube as a teacher whi hasnt made me sleep. or fumble or waste time. just bammmmm. u know its right and good but soooooo many questions. lol. k im donee
All is really very simple and i understood the majority of things you said with my bad english(i'm russian). Thank you
Such an incredible video. Thanks a lot for making this. :)
But how is it stored? How does each user store the infinitely growing chain of blocks? Every user must have a copy of the block chain going back to the genesis block. In order to participate in that block chain they must store the entire thing? What if the chain has grown into the millions?
Right now the growth is still manageable because storage capacity is still increasing. Different solutions have been proposed for the long term like pruning the Blockchain (removing fully spent transactions) to partitioning the Blockchain into multiple parts.
Great video. Just to double check my understanding, the reason you start isChainValid on [1] not [0] is because there's no previousBlock.hash and you'll get a false so the genesisBlock is being validated? Did I get that right? Thanks.