0:40 "A ressource where you can download all the digits of Pi." Wait, ALL of them? That's a very impressive website.

@speedfastman

4 жыл бұрын

The technology is finally here!

@MohamedSaad-zy7pu

4 жыл бұрын

pi has infinitely many digits no database ever could hold all digits of pi

@v0xl

4 жыл бұрын

@@MohamedSaad-zy7pu woosh

@xnick_uy

4 жыл бұрын

I can give you all the digits of pi right here in this comment: 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9. Just rearrange and repeat some of them as you see fit to recreate pi. You are welcome. :-)

@Firestar-rm8df

4 жыл бұрын

@@xnick_uy XD

Who noticed Dan replaced so many times "million" by "billion", by deleting "million" and writing "billion" instead (or vice versa), while there is just one letter to change?

@TheCodingTrain

4 жыл бұрын

🤦‍♂️

28:18 Shocking news! Man found last ten digits of PI

@luisgeniole369

4 жыл бұрын

We can use the tail command in bash to find the last ten digits of pi like so: tail -c 10 pi-billion.txt

@kimeg7294

4 жыл бұрын

"last ten digits of KNOWN PI sequence"

@Cry53r

4 жыл бұрын

@@kimeg7294 Oh... Oh no, sweet child... A billion is just the first sneeze of what has been calculated.

@ffggddss

4 жыл бұрын

Bigger shock - they turned out to be . . . 9876543210. Fred

Hey. I am just a random 30 yo Brazilian geologist switching carreers and I want to say that today is saturday night, world has corona, I am anxious, alone, thinking about life but this video and your work/passion/humour make things easier for me and I am sure for a lot of other people. Keep up the good work. We appreciate it.

@sombracep12

4 жыл бұрын

Boa Cara, muita gente de programação é de outras áreas.

No way Dan... ALMOST 1 MILLION SUBSCRIBERS NOW!? I remember your classic P5 tutorials before the whole coding train thing even existed!! I just wanna say, I'm proud, man.

@TheCodingTrain

4 жыл бұрын

Thank you!

I am always a bit amazed at how incredibly much larger a billion is than a million. I know the math is super simple, but the intuition of it is really difficult for me to grasp

@xot9897

4 жыл бұрын

Morten Flecks if you look at a millimetre on a metre stick, same ratio

@shreerangvaidya9264

4 жыл бұрын

Look back a dozen decades when the definition of billion was a million million in England, and you will be more amazed.

@InXLsisDeo

Жыл бұрын

That's why people don't realize how being a billionaire is completely unnecessary and actually detrimental to society. See it like this: if your salary was 1 million $ per month (not per year, per month), it would take 84 years (aka more than an entire working lifetime) to earn a billion $. And that would be without spending a single $ or paying any tax during all that time.

@InXLsisDeo

Жыл бұрын

@@shreerangvaidya9264 no, it's a thousand million. A million million is a trillion.

Do everyone will ignore the fact that , coding train will soon hit 1 million subscribers. I didn't even how when you reached too close to 1M. It had been 3-4 years now since i am watching your videos.... You taught me processing, you taught me the Nature Of code.... This channel is absolute gold.... I don't remember whats the first video i watched but i could proudly say that i had watched almost every of them. 😍 love from india Dan❤

@thomasdevelops3087

4 жыл бұрын

shashank Sahu he has hit 1 million as of today!

Finally another Coding Challenge! I really hope for more coding challenges, I really like these videos!

Congrats on 1 millions subs! Love these challenges! I wish you a lot of luck in the future of your channel

Ah!!! You are so close to 1 million subs!! Congrats Dan! You’ll always be the guy that made programming click for me :)

Pi was calculated to 50Trillion digits, a text file is available but it's 40TB! Today it's also been added to the pi.delivery api

@bilallaaroussi7110

4 жыл бұрын

What is the use of this

@ffggddss

4 жыл бұрын

@@bilallaaroussi7110 Esoteric. It's of some interest to mathematicians to know whether there are any non-random patterns in the digits of π, and these mammoth collections of digits can be used to answer such statistical questions. Fred

@ffggddss

4 жыл бұрын

50 trillion digits in 40 trillion bytes? Must be slightly compressed, no? (Even if that's the binary terabyte = 2⁴⁰ B, 40 TB ≈ 44.0 trillion bytes.) Fred

@Xnoob545

4 жыл бұрын

50T 40TB Wot

@oblivion_2852

4 жыл бұрын

Use it for some good random numbers

Ayyyye our first coding challenge in a while! And a good one at that!

You are the best. Your energy is incredible, the world needs more like you. My wife asks what is that song you are singing? lol a man in his 50s singing coding train. THANKS!!!

Love it!

waiting for this on pi day!!!!!

0:00 Why, happy Pi day to you too!

I love this!

The fact that the first million digitals is 1mb and the first billion is 1gb gives me great satisfaction.

Nice! I saw this suggestion on the github and was hoping you'd do it.

Cool idea!

This is my first video. I love this guy already. He makes learning coding fun. 😊

this man can visualize anything

the video title should be *Writing Built in Javascript Function* 😂😂 Thanks for this great video

I promise you that I was waiting this video from 1 year ago

Why You Dont try make a random face ganerator in processing(or you cant do that?)

That buzz sound effect kept jump scaring me!

@assenv

4 жыл бұрын

jup the buzzer is just wrong. short conductor whistle or passing train will be much more fitting ;)

This requires at last 1gb or RAM! Yiou should search directly from the stream, searching in chunk by chunk

@TheCodingTrain

4 жыл бұрын

Good point!!!

BCD encoding the file would be 500Meg for a 1 billion digits file, not sure how much you'd get from gz or zip since pi is a high entropy number.

KMP is best algorithm for me.

Great video, youre a very engaging teacher, would you consider doing some videos on functional programming, preferably Haskell, I have trouble understanding it and there hardly any good tutorials on KZread

hey dan! i am trying to implement this to my express server which holds projects, but it seems like the app.use overrides the front page (which is "/"). can anyone help me?

I came here for Pie... but all he was talking about was PI.

What about actually calculating the first thousand or million or so digits of pi?

It would be really neat to have the node server lazily evaluate pi as you search, until it finds the string of digits, no matter how long it takes.

I love pi day challange😍

Peek in pi => pecan pie, just so it's easier to remember

I have plenty enough file storage on my local server for 1 trillion digits (43.7GB), I may be able to set it up as a coding challenge by dumping the variables as I run out of ram and searching chunks of the file, but it would be quite a slow process.

@Xnoob545

4 жыл бұрын

But shouldnt it be 1TB thats insane compression

@andrewnunes9148

4 жыл бұрын

Try to use KMP algorithm and look for matchs while you read the stream

Hi can make programe which can read the chart provided by a website on the screen and create signals on activity detected !?

Can we get some more coding challenges? Maybe 3D tic-tac-toe or adding physics to your fractal trees from ages ago?

Is there a pi inside pi find 3 then 31 then 314 then 3141 I wonder what that sequence would look like ?

What program is he using?

You know things get handy when it comes to a 1GB file of plain text

If you substituted music notes for numbers, what would Pi sounds like? You could also see if you could find certain melodies within Pi. Edit: I commented this before watching till the end of the video haha.

Close to 1 million subscribers ♥️♥️

How about searching for the digit of a certain digit in pi? Could be an interesting recursive function

You should calculate pi in the code so you can just set a number for the number of digits you want

what if i +j will exceed the length of the text file , when the value of i is at last , or somewhere in the last

@luisgeniole369

4 жыл бұрын

27:56 We can use the tail command in bash to cat the last ten digits like so: tail -c 10 pi-billion.txt

@delta619

4 жыл бұрын

Brent Trenholme i thought it may give an exception something like out of bounds.

@delta619

4 жыл бұрын

Brent Trenholme yeah 😄, thnx

@TheCodingTrain

4 жыл бұрын

indeed, i should have accounted for this!

@delta619

4 жыл бұрын

The Coding Train i need coding train sticker for my laptop if i may ask. 🥺 Fan from India

Do you know any other code languages other than java script? I learned the bare minimum of java script and now I’m learning html to create a website for my friend

Code simplification: let start = search.charAt(0); for (let i = 0; i if (txt.charAt(i) === start) { let found = true; for (let j = 1; j if (txt.charAt(i + j)) !== search.charAt(j) { found = false; break; } } if (found) { return i; } } } return -1; is the same as for (let i = 0; i if (txt.charAt(i) === search.charAt(0)) { let found = true; for (let j = 1; j if (txt.charAt(i + j)) !== search.charAt(j) { found = false; break; } } if (found) { return i; } } } return -1; is the same as for (let i = 0; i let found = true; for (let j = 0; j if (txt.charAt(i + j)) !== search.charAt(j) { found = false; break; } } if (found) { return i; } } return -1;

All your videos are so great and so entertaining. Oh and: function askQuestion(question, sender) { if ( typeof question !== "string" && typeof sender !== "string" ) { return "The question and sender is not a proper one"; } if (question == "Any ideas for another video?" && sender == "David Shiffman") { return { getTheIdea: function() { console.log("Put the code to run this console.log as a reply"); } dumpIdea: function() { try { this.getTheIdea = null; } catch (e) { console.error("getTheIdea Cannot be deleted"); } } } } return "Sorry, No answer here..."; }

is there a Prossesing Server ?

10:04 If the condition ends up being true, you can just return -1 instead of keeping track of a variable "found"

@Justinba1010

4 жыл бұрын

You can't do so, you need to exhaustively search the entire string. Say you're looking for 1419, U would go 1 4 1, then 5, but you cannot exit there.

1 mill!!

Why number 3 is not in?

wasn't pi supposed to be a non-repeating and non-terminating decimal number? there are repeating numbers in this video though (such as ....99999....)?

You must do Tau Day too

Make a Picross solver.

Sir, I like how you deliver content about machine learning. I really want good people like you to contribute in the fight against corona virus. I have an idea, what if you create content about the neural network chatbot. I think this is useful for socialization about corona virus to the public. Some doctors say, prevention is the best medicine for all diseases. The socialization of preventing corona virus at this time is the most needed thing to suppress the virus spread. Thanks, i hope you at least read this.

Well, here In Spain we write the date in different order, so it is 14/3/20. Which is pretty sad 😞😞

@leo848

4 жыл бұрын

Qwerty GMR Same in Europe

@cosminturtureanu692

4 жыл бұрын

@@leo848 Spain is in Europe

@cosminturtureanu692

4 жыл бұрын

@@HiHi-ur3on oh yeah.. i forgot it just moved

@cosminturtureanu692

4 жыл бұрын

@@HiHi-ur3on yeah.. after all, you should eat your cereal

@leo848

4 жыл бұрын

Cosmin Cosmin I meant holy Europe

You could speed it up by a factor of 4 by instead of search for chars, search for longs (that is 4 chars at once). Caveat is that your search string should be at least 4 chars ... Even faster would be keeping track of where all digits are, that would speed it up by factor of ten, but you would use 10 times more memory. Performance tuning is always a trade-off for something else 😬

@TheCodingTrain

4 жыл бұрын

Thanks for these suggestions!

@agcummings11

4 жыл бұрын

The computer would still have to compare the sane number of bits, so it isn’t really a 4x speed up

@ryan-heath

4 жыл бұрын

See it like this: compare 12 bytes or compare 3 longs. The amount of bits is the same but the CPU can do it in less instructions, thus faster.

Bailey-Borwein-Plouffe formula

After 1 billion you would need to use algorithms similar to sorting algorithms.

Im gonna make this in python

No need for a bigger file. The natural challenge here is to compute the digits themselves. But I guess it requires a bit of mathematics.

He even included inside in the title

Isn't it as easy as pressing ctrl+f inside a pi.txt file?

double value=sqrt(2.0); println(value); // prints many decimal places. text(value, 100,100); gets an error.

When is 1 trillion coming haha

Happy Pi day!

Happy Gilfoyle

Oh, do you have a new character?

Or, in two minutes but with no error checking but including time to download file: import sys target = sys.argv[1] data = open('onemeg.dat').read() pos = data.find(target) if pos print '{} not found'.format(target) else: print '{}: {} {}'.format(pos, target, data[pos+len(target):pos+41])

But 1 million digits of Pi file should weight only about 2 megs - in 2020 it is nothing even for JS. It is very small amount of memory. And, well, 1 billion is about 2 gigs, depends on encoding.

This certainly has been an interesting year so far...

Happy 🥧 day🤓

Damm i even still haven't moved on since the last pi day special

Game made with p5.js: spaceadvent.glitch.me/

You could implement kmp algorithm, this algorithm is not so hard to implement...

i was in chat during the stream :))

Make plastic deformation simulation

what the hell dude, why you gotta do me like that? At 0:59 your buzzer sounds exactly like my door bell and i went outside to check if anybody just rang... *EDIT:* and he keeps using that buzzing sound throughout the video....

@TheCodingTrain

4 жыл бұрын

Ooops, sorry about that!

You are supposed to use pattern matching for this problem, and not for loops..

@lucasg.5534

2 жыл бұрын

you are supposed to shut up

Pi day should be 14% through the month of March, not the 14th day of March.

NINE NINE NINE NINE NINE NINE

15:07 it's not binary, it's hexadecimal I know that because I do Unicode stuff every now and then

@Justinba1010

4 жыл бұрын

They're interchangeable in this context. It is just outputted as hexadecimal, it is technically a binary, usually buffers are binary data. What does unicode have to do with this anyway?

Is it maybe fun, to find self indexing numbers in the first billion numbers of Pi? So like 3.1415(edit) 1 would be index 1 and thus be its own index. Or maybe if 1 would index 0. I got the idea from this Numberphile video about looping numbers in Pi( starting with a given number, finding its index, than looking at that numbers it index and so on) Here is the video kzread.info/dash/bejne/iWZkw7ZqZNeegNo.html

I forgot it was pi day... SHAME ON ME

@levinsondsouza

4 жыл бұрын

you are pi pi poo poo

@RubyPiec

4 жыл бұрын

@@levinsondsouza pie pie?

Do 1 trillion

grep

9:40 is he writing on the wall with a sharpie??

@TheCodingTrain

4 жыл бұрын

don't worry it's a dry erase whiteboard

Great video, but this annoing sound when you correct yourself...

dude literally i had this idea like a week ago to publish it today (pieandme.com)

10:00 txt.charAt(int) at line 17 could overflow.....

Peeing inside Pik -_-

Suggestion for the editor: have music playing in the background and increase the volume of the music when showing a fast forwarded lapse of Dan working through code, rather than having the music cut in and out

Here is the code for Processing(Java): String raw[]; String digits; String surch = ""; void preload() { raw = loadStrings("pi.txt"); } void setup() { size(500, 500); preload(); digits = raw[0]; } void draw() { background(0); suchBox(); int index = digits.indexOf(surch); fill(0, 100, 255); text(index - 1, width/2, height/1.5); } void keyPressed() { if (keyCode == BACKSPACE) { surch = ""; } else { surch += key; } } void suchBox() { rectMode(CENTER); textAlign(CENTER, CENTER); fill(255); stroke(0); rect(width/2, height/2, width/2, height/8); fill(0); textSize(20); text(surch, width/2, height/2); }

7th

Whoever read this, you'll be successful one day. Let's do this for the future

This is O(N²)

@amey7064

4 жыл бұрын

It's actually pretty close to theta(n), since the length of the sequence to be searched is small relative to s billion digits

@ryan-heath

4 жыл бұрын

I think the big o is still O(N) It would be O(N^2) when your search string would be always as big as the digits of PI

WTF man. I just found ur wikipedia page, and I thought you are in my age group. How the fuck are u 47 ? :O what diet do u have?