How do computers read code?

Рет қаралды 3,064,060

Күн бұрын

When you first learned to write code, you probably realized that computers don't really have any common sense. You need to tell a computer exactly what you want. But do you know about all the work the computer does to understand what you mean?
0:00 Intro - Where You've Seen Compilers
1:25 Source Code vs. Machine Code
3:38 Translating Source Code to Machine Code
9:05 How Compilers Make Things Easier
10:39 Outro - The Story of Automation
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Пікірлер: 4 100

@burntpotatoes999 6 жыл бұрын

Whoever writes the compilers are absolute beasts

@hausemester7386 5 жыл бұрын

nah compilers are simple

@immadmir 5 жыл бұрын

@@hausemester7386 Writing GCC, LLVM is indeed "rocket-science".

@MygenteTV 5 жыл бұрын

simple? where is your complier?@@hausemester7386

@MygenteTV 5 жыл бұрын

@ well if you really did that then you are a genius

@Dennis19901 5 жыл бұрын

@@MygenteTV Nice logical fallacy.

@janek4024 11 ай бұрын

my man just quit after making the best video about compilers, what a legend

@oompalumpus699 Ай бұрын

I miss him.

@lucasoliarovera9549 14 күн бұрын

What happened to him?

@Insignia_ Жыл бұрын

Mad respect to all the engineers behind compilers.

@Maltebyte2 Жыл бұрын

IT feels almost like something they would find inside of a crashed alien ship! xD

@theowillis6870 Жыл бұрын

its not that difficult really. once you build one, its really consistent. its a really fun project tbh. i built an interpter so. which is like a compiler with out the code gen.

@stinkyyy2k Жыл бұрын

shout out to my boy terry, the mad fella actually made an entire os (temple OS) from scratch, running on its own language (Holy C)

@salutboss3008 Жыл бұрын

@@stinkyyy2k yea terry was amazing RIP

@RenderingUser Жыл бұрын

@@theowillis6870 that's not really the same as compiling. Also, while it's true that the basics of compiling is easy..... The sheer amount of optimising you have to do to make the compiler even remotely give a decently sized executable file is unreal That's why most people have their language compile into something like LLVM, for example

@dynpallomah5918 Жыл бұрын

I remember watching this video a few years back and fascinated. Now I'm more than capable of creating my own programming language.

@rgloria40 3 ай бұрын

It's probably going to be exciting seeing the next generation jumping directly into Quantum Computing... I see a lot of confusion, flat lies and etc... but they will figure it out. what is possible, what is not and what is Politically Correct.

@coffeedude 5 жыл бұрын

"So our program is pretty boring right now, let's add a line to increment x by 1" Hold up dude, you can't go that fast to such levels of complexity

@mexicanlucky 4 жыл бұрын

hahaha holy shit im dyying

@yakinthebox 4 жыл бұрын

not even X++;

@Norogoth 4 жыл бұрын

It was boring but now it is starting to get interesting baby.

@equenos 4 жыл бұрын

@@yakinthebox not even x = 4;

@yakinthebox 4 жыл бұрын

@tutacat No

@SergioEduP 4 жыл бұрын

When I started to learn how to write code years ago I was told "the computer is one of the dumbest machines, it only follows orders even if they are wrong", it really helped me shape my mind to understand the logic of many programs

@willd0g 4 жыл бұрын

Agreed

@ybr8192 4 жыл бұрын

Self aware AI will remember this

@onlyme0349 3 жыл бұрын

"it only follows orders even if they are wrong" humans don't?

@DamnBoii123 3 жыл бұрын

M.L. and A.I. - Am I a joke to you 😂😂

@theshermantanker7043 3 жыл бұрын

@Nebula no, Human only use them for tedious tasks lmao

@jadedplover1851 2 жыл бұрын

I think my university did it pretty well, first semester you take a class called "Computer Systems, Architecture, Networking and Security", and in that class you work with manually compiling written code to objects and then linking them in assembly then you also covert them to binary aswell, you also cover logic gates and in it some optimization compilers do to your code. It cover os architecture and network protocols and cryptography but I think it's important to understand object linking and compiling otherwise you'll get very confused when you start trying to use cmake and get 20 linking errora haha.

@robonator2945 Жыл бұрын

Jesus you must have gotten extremely lucky to have a CS track that was that exhaustive and explanatory, even sounds like it was using linux from the start too. I've been to a few different university CS courses and they've all been nothing like that. Maybe it's a culture thing but I WISH I got that sort of introduction to programming.

@kornelijussliubauskas8299 Жыл бұрын

Where did you study?

@essayedgar Жыл бұрын

I’m also curious what uni you’re talking about as this sounds lovely for a 1st semester class

@jadedplover1851 Жыл бұрын

@@essayedgar Monash University in Melbourne, AUS. The unit itself isn't exhaustive in any of these topics by any means, however most of these topics are often fundamental to many career paths despite being overlooked in favour of more specialized practical work. But the relative broad coverage of many of these topics helps give a lot of context and elevates students' understanding of other units substantially. Often a lack of these fundamentals leads to elusive higher level problems the person is likely to struggle to identify and often results in trial and error learning of these concepts, or even worse where the student fails to learn these concepts completely which I see all too often result in zero-day security flaws in software they later release in their career.

@mridhulml3269 Жыл бұрын

damn lucky you..I'm doing btech CSE and all I got in first year was a lot of chemistry, physics, civil engineering and whatnot..literally wasted a year imo

@vadiks20032 Жыл бұрын

the fact you explained it to us in such a detail just tells that you either had a very good experiecne with writing a compiler, or you had an experienced person check/write your text, or

@theonionpirate1076 4 жыл бұрын

I remember this quote from the programming classes I took while getting my EE degree. I don't remember who it was attributed to, but... "Computers always do what you tell them to do, and rarely what you want them to do."

@MauritsWilke 4 жыл бұрын

Thanks for that amazing quote! Ill share the one I liked: There are 10 types of people in the world, The ones that understand binary and those who don't

@theguywhodoes6790 4 жыл бұрын

@@MauritsWilke you bitch

@pootzeketzi1233 4 жыл бұрын

@@theguywhodoes6790?

@theguywhodoes6790 4 жыл бұрын

@@pootzeketzi1233 he made a pun with binary

@isaaclaughton7591 4 жыл бұрын

so true

@momomi104 5 жыл бұрын

In a push of a button... no.. nope.. wait..... -Programmer life story

@zucc4764 4 жыл бұрын

A push of a button. *Realizes he actually runs Python 3 instead of Python 2* There we go. A push of a button.

@sublime_tv 4 жыл бұрын

50 errors laters, there are now 60 errors...

@Hangyeol97 4 жыл бұрын

@@sublime_tv SO TRUE

@manonthedollar 4 жыл бұрын

I genuinely laughed out loud at that part, and I'm dead inside.

@liamtaylor3576 4 жыл бұрын

unexpected indent, syntax error, index out of range 😂

@pptide 3 жыл бұрын

Thank you for putting EVERY tool and programming language you used in the Description!!! Sometimes I'm so confused on which programms were used in a video!

@choicefive9761 2 жыл бұрын

This cleared so many of my doubts and made me take up computer engineering more passionately , thanks for changing my life

@Cyber_One 5 жыл бұрын

When you know how computers work exactly, how the internet works and all that stuff, you get fascinated a lot.

@NikkiCRMP 5 жыл бұрын

Opposite. Once you understand how it all works, it stops being "some magic".

@Cyber_One 5 жыл бұрын

Nikki yes, I mean you get fascinated about how humans made this and you start appreciating technology

@randomthings5383 4 жыл бұрын

@@Cyber_One Which is why i hate the technology these days, we went from changing humanity to wifi salt shakers.

@randomthings5383 4 жыл бұрын

@Vseslav Levchenko prove me wrong

@randomthings5383 4 жыл бұрын

@Yann cedric Totsingan im 22yo and studying CS lol your guess was off by a lot

@OonHan 4 жыл бұрын

"How do computers read code?" _by running code_

@arithedotanewb9126 4 жыл бұрын

Yeah.. I was expecting him to talk about transistors and what actually makes up a cpu. That's what reads it. I had to design one from scratch in one of my electrical eng classes

@johneygd 4 жыл бұрын

Ever wondered how a computer compares to a human brain?

@GamerTheTurtle 4 жыл бұрын

@Chris Russell They aren't building simple circuits using Ohm's Law (not electricians), electrical engineers learn the why and how of circuits using fourier, vector, and complex analysis. They don't just learn circuitry either, the 'weed out' classes constitute three semesters of physics, and four of calculus (if you count differential equations), next comes electrodynamics, thermodynamics, quantum mechanics, classical electromagnetics, the whole nine yards and more. It is extremely over the top conceptual and recognized as one of the harder engineering courses. So ya it's not just some piece of paper that the "HR people" give credence to. Electrical engineer is a set of tools used in almost any industry that uses electricity.

@GamerTheTurtle 4 жыл бұрын

@Chris Russell I like how you so pompously tout your knowledge of elastance but brush off thermo. This comment is absolutely sceaming at me that you fancy yourself some tragic savant, doomed to mediocrity by the system that lets youngsters with a an embossed plaque to go on to bigger and better things. Save your schtick buddy, you just sound haughty and maybe a little jealous, else why are you even giving this spiel in the first place but to call yourself a gifted little star.

@Luka-he5mr 4 жыл бұрын

Can I throw some Lua in here?

@DaVince21 2 жыл бұрын

This video perfectly answers all of the questions I had as a teenager twenty years ago. All the way up to "but how would the first compiler be written?" Thank you for introducing others to these questions. 😄

@Moe5Tavern 3 ай бұрын

This is an amazing video, you really have a gift for explaining complex matters in a clear way, shame this channel stopped uploading. Hope you are well!

@hamadmohammed7645 4 жыл бұрын

"Source code is made only to be understandable to humans" My brain cells: Ight imma head out

@ExtremusStupidus 4 жыл бұрын

lol

@half-qilin 4 жыл бұрын

Source code is sometimes only readable by its creator. I know my code falls victim to this

@atastypineapple9296 4 жыл бұрын

@@half-qilin exactly, reading people's code is a pain in a$$.

@KoolMonkE 4 жыл бұрын

@@half-qilin well, on the bright side it could be more difficult for hackers.

@ErrorNoInternet 3 жыл бұрын

Fortran: Hold my code

@tremon3688 4 жыл бұрын

Imagine doing all the holes for old computer programs and then you realize you forgot a semicolon....

@TorutheRedFox 3 жыл бұрын

you didn't need semicolons back then semicolons are just to allow the programmer to set the end of an instruction in a high level language rather than having the compiler rely on line breaks so you can break it up into multiple lines for binaries, semicolons leave basically nothing behind unless it's a lone semicolon, which compiles into a nop, which is the only exception

@gianmarcoproia5855 3 жыл бұрын

@@TorutheRedFox it's a joke duh

@TorutheRedFox 3 жыл бұрын

@@gianmarcoproia5855 I know

@cosmic4297 3 жыл бұрын

Everybody: wow you write code that’s really hard Me: you should see the people who write compilers

@Luka-he5mr 3 жыл бұрын

Everybody: What’s a compiler? Me: its a program that turns source code into machine code Everybody: whats source code and machine code?

@JonathanMandrake 2 жыл бұрын

Honestly, the most interesting part was your description of how machine codd works. From the machine code to the output felt always like magic to me, and this starts to give meaning to what is really happening

@dianathomas2674 Жыл бұрын

I have been wondering about this for so long, not knowing was always a stone in my shoe, a disturbance in the force, it was. I knew the code had to be transferred into binary, but how? And, "Compiling the compiler with a previous version of itself", the sweetest poem I've heard in a long time. Thank you so much for this.

@5up3rp3rs0n 6 жыл бұрын

lol that python 2/3 joke at the end edit: didnt realize this is just released 18 minutes ago, nice

@bit2shift 6 жыл бұрын

Likewise the one at 1:08.

@manuelisaiaspenapujols4451 6 жыл бұрын

Nice easter-egg

@xetera 6 жыл бұрын

Yatta Sovr That really doesnt have anything to do with the joke though.

@KingJellyfishII 6 жыл бұрын

HAHA! I was just going to comment the same thing! That is why I still program in python 2

@alice_in_wonderland42 5 жыл бұрын

@@KingJellyfishII well you can convert python 3 to 2 and 2 to 3

@exquisite7416 6 жыл бұрын

This video managed to take a complex idea and compile it down in a form understandable to our human brains. Funny that :)

@skorpius2029 5 жыл бұрын

@Niepowtarzalny Użytkownik "decompilation" of how compilers work

@johnpro2847 5 жыл бұрын

Maybe .. but it also presented more unanswered questions :(

@SomeYouTubeTraveler Жыл бұрын

Me: "Computers work by doing magic." Frame of Essence: "Here's how they actually work." Me: "Computers work by doing 50x more magic than I thought they did."

@dianathomas2674 Жыл бұрын

Four years later this comment still deserves a like.

@rajesh_404 Жыл бұрын

When I read about compilers, it all start with lexical analysis, parsing, tokens, etc. But, you just built up an intuition. I got what you gave. Thanks!

@christianriekert2908 2 жыл бұрын

I wish you will come back any time.. this videos are filled with lots of information and are quite funny so I wanted to watch the entire channel on one evening .. well.. it’s 12:30AM and I’m still watching 😅 Nice job!

@quack3891 4 жыл бұрын

"What you've only done python scripting!?" *started on C++ and moved to java* *sweating bullets from dodging a bullet*

@glzr_io 4 жыл бұрын

you just dodged a bullet by jumping into a bigger and worse bullet

@rorymax 4 жыл бұрын

i started on Java and am now learning C++ :D

@andrewdaniels5043 4 жыл бұрын

@@glzr_io python's syntax sucks and is slow

@pepperoniboy57 4 жыл бұрын

@@andrewdaniels5043 no

@andrewdaniels5043 4 жыл бұрын

@@pepperoniboy57 yeah lol Java is better

@MSDOS128 5 жыл бұрын

>Programming isn't so hard... *calls quit()*

@maybelbdidit 5 жыл бұрын

Python's is exit()... lol

@anteconfig5391 4 жыл бұрын

@@maybelbdidit In python you could use: exit() quit() or if you import sys sys.exit() All these work.

@Miko-hw1ft 4 жыл бұрын

Lolz

@abbyboing 4 жыл бұрын

@@maybelbdidit Just try plugging out the power source. Works with every language.

@Sparkette 4 жыл бұрын

@Irritating Would have been funnier if there was a single frame with an error.

@IAmNumber4000 2 жыл бұрын

How tf did humans figure out how to do this lmao

@TheInterestingInformer Ай бұрын

100 billion people * 40 years of thinking = quite a bit of progress 😅

@tgsvampire Ай бұрын

My brain is getting roasted in a corner thinking the same....While I just completed watching this video.

@tgsvampire Ай бұрын

@@TheInterestingInformerThat's not really just, quite a bit of progress TBH...💀

@user-mf8nn3tl5w 16 күн бұрын

It took us approximately 300K years to figure this out(since homo sapiens spawned 😂)

@johngeiger3770 9 күн бұрын

Aliens 👽

@Estrav.Krastvich 2 жыл бұрын

Thank you for such a creative and clear explanation of such tough things!

@Neurofilia 3 жыл бұрын

When I was teen (15 years ago), I was fascinated in programming. I remember spend a lot of hours on the computer trying to figure out how it works and why a code like "print("Hello world")" works in a machine level, but in that time internet didn't have this kind of videos (in fact, youtube was just beginning). Nowadays with this kind of videos it's really easy learning about everything and I am still fascinated with computer (but now approaching it from neuroscience) and your skills to transmit this information, however are awesome. Thanks a lot !

@Neurofilia 3 жыл бұрын

@killmoo almost, I'm 29 😅

@xephobia795 3 жыл бұрын

ouuch that was hard understanding things like puts() in c because it use the system c lib (libc/glibc/musl on linux and msvcrt on windows

@rithvikkona8922 3 жыл бұрын

it just show picture not found thingy

@thisisfaiaz 3 жыл бұрын

@@Neurofilia right now I am 15 and learning this programming stuff

@Dennis19901 Жыл бұрын

Even with rhe Internet it's still extrenely difficult to understand, if at all. Processors are insanely complicated nowadays including how they execute instructions

@swedneck 6 жыл бұрын

This is a damn near perfect video

@kanayocopy9876 3 жыл бұрын

This has to be the funniest and one of the most engaging explanations I have seen on KZfaq😂😂

@tylerornelas9552 2 жыл бұрын

this is now, by far my favorite CS channel, good stuff!

@shybound7571 4 жыл бұрын

KZfaqr: "you've only been using python!?" Me, who uses scratch: "uh, sure"

@t07minas 4 жыл бұрын

Rabot Carol

@PhoenixStudios147 4 жыл бұрын

Web languages gang here

@gamermapper 4 жыл бұрын

People less than 13 year old aren't allowed on KZfaq

@shwabbaa5728 4 жыл бұрын

@@gamermapper what

@couldntsetpass2901 4 жыл бұрын

JS gang rise up

@DlcEnergy 5 жыл бұрын

Bootstrapping (pull yourself up by your bootstraps / an impossible action) is to compile a compiler from its own source. It's a chicken and egg situation. Which came first? The compiler? Or its self source? The compiler, born from another language. The first C++ compiler originated from C. (Bjarne used C to create a C with Classes preprocessor. He used his C with classes language extension to create Cfront. Cfront compiled his C++ language into C. And that's why C and C++ mix together.) The first C compiler originated from B. (B was first written for the PDP-7 minicomputer. (Programmed Data Processor) It evolved into NB (New B) to support the PDP-11. C was written in NB.) The first B compiler was written in TMG. (TransMoGrifier) The first TMG compiler was written in PDP-7 assembly language. Assembly is machine code made readable. (directly from the opcodes. (operation codes)) Before Assembly, people would've likely used some form of custom assembly code on paper to translate into machine code.

@zeozeto5457 4 жыл бұрын

Whoah, untold history, thanks now i can sleep in peace

@herrbonk3635 4 жыл бұрын

It's not impossible though to write a compiler without using another high level language. Most early compilers and interpreters were written in assembly (for Fortran, Algol, Simula, Lisp, Basic, and so on). Some of them first wrote a simple compiler for a subset of the language in assembly and used it to compile a more advanced compiler (written in that subset, but implementing more of the language).

@DlcEnergy 4 жыл бұрын

@@herrbonk3635 of course, but it wouldn't be worth it. the compiler will do the same exact translation you program it to do. the only difference would be how fast those compilers are at doing that. i think we'd take slightly slower compilations, for more well managed and developed compilers. that's the whole reason for higher level languages to begin with. to make development easier and more time efficient. hence why AAA games are written in C/C++, not assembly. we don't need the utmost potential possible out of most stuff. we'd rather have the darn thing finished already. and better compilers means better compiled code.

@herrbonk3635 4 жыл бұрын

@@DlcEnergy Hmm, I wasn't discussing efficiency here, but rather principles from an historical perspective. I was under the impression that you did too. However, you somehow seem to miss my point about that interesting middle way between assembly coded and self hosting compilers, using a subset of the HLL implemented. It has been used also for relatively "modern" (at least when you are 50+) languages like Pascal and Modula. I sure agree that compilation speed is much less important today, when everybody has "super computers" (in a very real mening, compared to the situation in the 1960s, or even the early 1990s). I personally love interpreted languages for their great flexiblity and security (checking array accesses, stack overflow, and so on). And my own design of a HLL language happens to be a pretty slow(!) compiler with some aspects of typical interpreters that I find useful. It produces quick and efficient code though. (All statements and their syntax are implemented as fully redefinable operator functions in this language, with pre-, post- or infix syntax, hence its relatively slow parsing speed.)

@DlcEnergy 4 жыл бұрын

@@herrbonk3635 That's why i'm bringing efficiency up. Obviously a lower level language can achieve the same. But there's a reason for higher level languages.

@filipavieira8794 2 жыл бұрын

This video is amazing! You explained everything in such an easy and fun way.

@kartikeymishra5398 2 жыл бұрын

I do genuinely appreciate. Your video quality. It's awesome man, Keep it up.

@whythosenames 4 жыл бұрын

This is so mindblowing how this swaps the values, I have never seen this before: x = x + y; y = x - y; x = x - y;

@thegreatzoom5073 3 жыл бұрын

So x and y are 0...?

@whythosenames 3 жыл бұрын

The Great Zoom no = in programming means "assignment". You assign the value on the right to the variable on the left. Even equations like x = x + 1 are possible. This would not work in mathematics for example, there = is a "comparison". In most programming languages comparison is defined as "==" which is not the same as "="

@TorutheRedFox 3 жыл бұрын

this would immediately cause a compile error because Y is undefined when you're initially assigning X using Y

@whythosenames 3 жыл бұрын

@@TorutheRedFox yeah you have to define them otherwise the swapping would not even make sense

@ninesquared81 3 жыл бұрын

In Python, you could actually write it in one line as x, y = y, x which is a direct consequence of Python's unpacking. It is fundamentally different from the C-style approach though (as I understand it) because firstly, names in Python don't correspond directly to a location in memory and the y, x on the right is actually a tuple, more explicitly written as (y, x).

@viharcontractor1679 6 жыл бұрын

Instead of IDEs saying "EOS : End of expression expected at line : 40" They should just say "Add a semicolon at the end of line 40 ya dummy" Life would be easier this way.

@son_guhun 6 жыл бұрын

Well, eventually your human brain will learn to compile that error message into an instruction to add a semicolon somewhere xD

@ArchHeretic1 6 жыл бұрын

or just use a a decent modern IDE that will underscore that missing semi-colon. less wasted energy and time.

@macstevins 6 жыл бұрын

Nor saying: "Semicolon Warning: Please put semicolon at the end of the line 40", or just adding a semicolon when running or the IDE finds the error. Dumb IDE Developers... Oh wait, I'm a IDE Developer.

@dennielluissadian5026 5 жыл бұрын

And then python coders will be like, "what the f is the semicolon?"

@ArchHeretic1 5 жыл бұрын

@@spidercubed9718 notepad?! Pfft amateur. Real pros use punch cards

@jiffylou98 10 ай бұрын

Just got past the intro and somehow I'm subscribed. Presentation so good it's an automatic yes

@janek4024 11 ай бұрын

i found this video, and than i went to check out the cccs. a week later, i am here now again to say thank u - this video is a really good complementation to the cc. this is insane and mind blowing.

@hikerwolfspaine8200 6 жыл бұрын

I was kind of lucky with my instructor. He's an old veteran who goes on rants of his experiences with writing in c and dealing with UNIX mainframes and talks a lot about all this underlying stuff which makes programs work.

@pooja05rejoice 5 жыл бұрын

This video should be the mandatory pre-requisite for any and every concept of computer Science henceforth :) Amazing , So Thankful for you

@anuragmishra3227 4 жыл бұрын

@@ithaca2076 means worship on Hindi.

@abcd123906 4 жыл бұрын

I absolutely agree! And to think it's only 12 minutes long!!! Why is this not shown to everyone who is learning to code?!

@supreetkumar7604 4 жыл бұрын

@@abcd123906 This is on YT. So, they will co e to know that they can basically learn all sorts of things on internet. And? college gone broke.

@BorisNVM 2 жыл бұрын

I loved this, this was so clarifying and it helped me out with to taking me through new programming skills. Thank u

@tgsvampire Ай бұрын

IDK how man, but this video suddenly popped on my face after may 2 years when I know a bit more about computers and programming and I am able to comprehend more of what is going in this video.... And I just realiesed, This man is creating some real value dude....🔥

@blerst7066 4 жыл бұрын

As a language geek and conlanger, I'm so glad that I now know how compilers work. It inspires me.

@gdtutorial 11 ай бұрын

As an AI Language Model.....

@ranijoy7630 3 жыл бұрын

I know you probably won't read this but still, I want to say this is my favourite computer science video on youtube. You explained things in such a clear manner and also not boring one bit. What's really special about your video is how you explain some of the concepts lecturers and others never teach. for eg the part where you talked about how compilers themselves are created. Thank You for the video

@kakyoindonut3213 2 жыл бұрын

he hasn't posted anything for 4 fucking years, and your comment was like 1 year ago

@imibuks-replit 2 жыл бұрын

@@kakyoindonut3213 yeah. these videos are amazing but the channel is dead innit?

@kakyoindonut3213 2 жыл бұрын

@@imibuks-replit maybe, 4 years is a really long time

@imibuks-replit 2 жыл бұрын

@@kakyoindonut3213 yeah... for a few months yeah but almost half a decade....

@shivamxtras Жыл бұрын

I feel the same and I hope he gets back to KZfaq again!!

@aatifakhan1653 2 жыл бұрын

This video is so creative and understandable the deep part of how the program works JUST MINDBLOWING

@ex-xg5hh 2 жыл бұрын

Compilers aren't actually as complicated as people tend to think. They can be, and the industry grade ones like gcc really are, but the core idea is really simple. Most people who know programming can write one (not without extensive googling of course), no cs/math degree is required for that. I'm speaking from experience as I've written a few of these things myself back in high school. In fact, I believe that everyone who considers themself a programmer should write a compiler to properly understand how it actually works, as in, "I don't understand it if I can't do it myself".

@usrnewxnew5227 Жыл бұрын

Yeah, like from what I heard almost half of gcc is just the optimization passes where they pull off some freaky shit. The actual translation and ast isn't that complicated.

@snesmocha 9 ай бұрын

@@usrnewxnew5227one quarter is parsing cause c++ is a very hard language to parse, the next is then optimization… witchcraft

@gesoocreesto6374 8 ай бұрын

@ex-xg5hh hope you're still acrive... may i ask what did you write in assembly? what was the purpose of the code? was it like some simple thing or a complex code like rollercoaster tycoon type of stuff

@mohammednajl5950 7 ай бұрын

I remember writing a brainfuck compiler back when I was beginning C programming. It was fairly simple (brainfuck is literally designed to have a small compiler) but it helped me understand a bit about how compilers work.

@pixelstriko1642 7 ай бұрын

Interpreters are probably easier to write tho since you can just run the code in the language of the interpreter instead of generating machine code

@minibun04 4 жыл бұрын

That ending 😂 Pain of people who change from Py2 to py3

@half-qilin 4 жыл бұрын

I try to avoid Python, it’s complicated to figure out after learning other languages. I prefer C over Python.

@TorutheRedFox 3 жыл бұрын

@@half-qilin Python is very inefficient too, and is only a scripting language, plus it also requires the user to have all of the required libraries and the same major Python release installed, while a binary only requires the user to have the same OS, and potentially a few dynamic libraries, which in the case of Windows and Visual C++ (which also tends to apply to C if you use functions included in VCPP DLLs), the user very likely has them anyways, and with Linux and macOS it tends to be a little more complicated at times, but things generally are more backwards compatible than Python

@half-qilin 3 жыл бұрын

@@TorutheRedFox I develop for MacOS or game consoles like the 3DS (when I’m not using Unity). I might consider using Java at some point, but IDK on that one.

@RaLo4 3 жыл бұрын

@@half-qilin good job comparing a complied language to an interpreted language guys. it's not the case of different languages for different uses, it's definitely the case of one being better than the other. jeez better call all these research facilities and let them know they are using the wrong language.

@panoskotoulas759 4 жыл бұрын

Man please keep making videos. You are the only chanel that answered all my questions in such a clear way without being afraid to go into a bit of math. And your humor is awesome as well. You are literally the best computer science chanel I found, it would be a shame to stop making such awesome videos. Hope we hear from you soon.

@EngMoGo2010 2 жыл бұрын

I love this video, I never get bored watching it over and over

@omw1727 2 жыл бұрын

i was learning how to code in python, then the guy on the video said "compilers and intrepreters are different, but do the same work basically", and now even if this haven't respond my question im glad to understand a little bit more about computers, this video is really cool and well explained!!

@nikm2089 3 жыл бұрын

I have always been fascinated with compilers and how they work ever since I started to teach myself to write code. I teach myself out of hobby and to use my brain since I'm a bit older. Awesome video.

@arcsexpedition2406 3 жыл бұрын

10:40 I was so excited when I heard this. That's the exact question I've been wondering ever since I learned about compilers! Thanks for clearing it up, keep up the great work!

@brian_kirk 2 жыл бұрын

My day is going much better now that I've seen this video and understand compilers better ;) .. thank you for making this!

@georgiosrigas8094 2 жыл бұрын

Excellent. The way you explain it is a gift you have. Thank you!

@badcholesterol 3 жыл бұрын

"The difference between an amateur and a professional is you write your own compiler."

@MrRolnicek 6 жыл бұрын

Oh god! The ending! I was eating goddammit! I nearly spat potato chips all over my keyboard!

@neilbalch 6 жыл бұрын

lololololol hope you learned your lesson! :)

@neeeeeck9005 6 жыл бұрын

I didnt get it please explain

@MrRolnicek 6 жыл бұрын

I mean ... I lived through this many times. The amazement at how simple Python is, just print "This" and it works! No wait, that's the old python, the new one needs brackets.

@bithon5242 5 жыл бұрын

You should eat more healthy

@marcfoster715 5 жыл бұрын

@@potato_x69 Let's call the whole thing off

@ammyvarela598 Жыл бұрын

This was one of the very few times I learnt while having fun! Thanks for this amazing lesson

@SRPhantoms Жыл бұрын

It's funny that you brought up the little skit in the beginning about intro cs courses because my intro to cs course required the students to use Cygwin and we had to understand enough about compilers and terminal commands to compile code we wrote using nano or pico

@ultravidz 6 жыл бұрын

I wish I didn’t wait until I was 18 to learn programming. I could’ve learned this shit easily at the age of 10. I think most people could.

@reyariass 6 жыл бұрын

AlphaOmega my thought exactly!

@MakinBacon0651 6 жыл бұрын

Well I did try when I was 12 and I was able to write HTML and CSS with ease but VB and C I just could not grasp. I stopped trying to program and stuck with the hardware side as a net admin and then later tried to pick up programming again. It does seam WAYYYYY easier than it was 18 years ago.

@ultravidz 6 жыл бұрын

I had a similar experience at 12, with html and css, mainly for building out my old myspace page. Regretfully I didn’t revisit the subject for years to come.

@TheNathanDrawdy 6 жыл бұрын

Ya know, I am just a freshmen, and Java is quite nice to use. Not saying the same for JavaScript, but I am saying that about Java itself.

@RandumStuffRandumnes 6 жыл бұрын

I used to teach a programming class to 7-12 year olds. It's definitely a thing.

@jeremyrodriguez9815 4 жыл бұрын

the best video ever seen in my life about programming. you've done a wonderful job.

@shehab976 3 жыл бұрын

hats off to those who made compilers,struggeling behind the scene for making programming world so simple!

@eddybobea6709 3 жыл бұрын

I like how Crash Course computer Science was mentioned, you are not mistaking dear sir, such as yourself they are very good at explaining.

@NinaTheLudaca 6 жыл бұрын

Beautiful video content and editing. Thank you for your efforts. ♥

@OldDogNewTrick 4 жыл бұрын

I first learned about all this 54 years ago. The knowledge served me well over the years.

@sujeewarathnaweera 2 жыл бұрын

tf?

@abhiramreddy9234 2 жыл бұрын

You spent a lot of time and efforts for this and added a pinch of sarcasm to it, you deserve a subscribe for sure, very well explained sir

@Yggdra666 2 жыл бұрын

Yesterday I talked to somebody who worked for big companies back then when computers were introduced. He worked a lot with Machine Code and Assembler Language. It's quite fascinating.

@shubhamshinde3593 6 жыл бұрын

Damn, i thought this channel was over, I'm so happy he's back!!

@Nae_Ayy 5 жыл бұрын

aaaand he's dead

@frameofessence 5 жыл бұрын

coming back soon!

@SKO_PL 5 жыл бұрын

@@frameofessence still waiting lol

@prakharsinha4822 5 жыл бұрын

@@frameofessence we miss u

@binmosa 4 жыл бұрын

Psychologically, if students start learning assembly language first, then they're exposed to high level language, they would grasp the concepts like super quick.

@jaredvec5737 2 жыл бұрын

That’s not really true it’s easier to learn high level stuff first, and then to go under the hood

@ggsap 2 жыл бұрын

@@jaredvec5737 Yeah

@Changecangs 2 жыл бұрын

@@jaredvec5737 I think the best way to learn is to start low, but high enough, but not so high. That's why college usually starts with c/c++

@mk17173n 2 жыл бұрын

The thing about learning high level programming languages before lear ning things under the hood is that you dont understand why certain things dont make logical sense. For example why .1 +.2 is not equal to 3. This has nothing to do with the high level language itself but rather how math works with binary language.

@calebgoodfellowcg 2 жыл бұрын

Attrition would be way to high. There’s simply too many hurdles to learn low level and less intuitive languages for a beginner. Psychologically, it’s better to be able to start practicing very soon, like with python, rather than have to learn a ton before starting. I agree that starting from the bottom gives a better understanding, but I think beginners need to be able to have an easy way in. If you learn assembly or whatever first that’s good, but I don’t think it should be universal.

@khalidsaad9452 Жыл бұрын

high quality content thats taken for granted

@ayubseeed 3 жыл бұрын

wow this video was amazing, my major is computer science at my current university I really didnt like it that much I just entered because it was my only option, now after I seen this video it really gave me a motivation I just love exciting things, and this was exciting personally thanks for all the work frame of essence

@richarddoci 5 жыл бұрын

wow better than most classes I took in college hahaha

@watchingpassive9485 4 жыл бұрын

The dead inside laugh "hahaha"

@KarmelAbufarha 4 жыл бұрын

For someone who has zero experience in programming and interested in the field. This video was incredible helpful in understanding the origins of code and made a lot of sense. I can see why there are only linux and it's many distributions as the only real alternative in operating systems. It would take a lot of work and know how to reinvent the wheel. Great video.

@petefrancisco3267 7 ай бұрын

If you got zero experience about programming you wont understand what is being talked about in this video specially in the comments section!!!

@romanb.6528 Жыл бұрын

Very interesting about the beginnings of programming and the history of programming languages. Thank you very much, please do more)

@doganbenli9681 3 жыл бұрын

It was amazing! Pure, simple and easy thanks a lot man.

@samburnes9389 6 жыл бұрын

I just found this channel, it’s awesome!

@brunozimmermann8017 4 жыл бұрын

I think it is cool to add that high-level or low-level are both relative to a specific machine, so Python is high-level to an Intel processor, but somewhat lower-level to the Python VM. Also note that there exists compilers that translate a high-level language to a language that would look like it is high-level comparing to an Intel processor. Also, JVM execution is more the complex then a "interpreter". Code is initially interpreted, but most used functions are compiled to native code on-the-fly and executed natively.

@darrenlefcoe 14 күн бұрын

one of the best videos i have seen . . . excellent work !

@courtneybulla4533 2 жыл бұрын

OMG YOUR VIDEOS ARE THE ABSOLUTE BEST!!!!!!!! I’ve watched over 40 on this subject and never could understand it but now it feels like it clicked I understand it so well now 😆😆😆😆 Thankyou so much you’re a great teacher haha:)

@Skulltroxx 4 жыл бұрын

I can't even imagine myself ever making a compiler for an programming language! That's like an Avenger-level shit

@JoshuaKisb 4 жыл бұрын

am going to make one. still learning. its a huge task but its not very difficult

@toniodotcom 4 жыл бұрын

Imagine that Bill Gates did so: He wrote the BASIC compiler...

@boulahchichenadir9075 4 жыл бұрын

@@JoshuaKisb did any of you make one already ?

@JoshuaKisb 4 жыл бұрын

@@boulahchichenadir9075 yeah sort of

@boulahchichenadir9075 4 жыл бұрын

@@JoshuaKisb sort of is still an improvement i geusse

@Nick-lx4fo 4 жыл бұрын

11:33 programming in a nutshell

@fisch37 2 жыл бұрын

When you accidentally mix up the programming languages (or versions in this case) (I once tried to print to Serial Out in Java. Didn't work for some reason)

@Chris-bn1vt 2 жыл бұрын

Actually an interesting video. I see a bunch of people who can benefit from it, I see people regularly ask how to make their own programming language, or operating system. They do not know how programming languages work, how they are made, or how computers handle them.

@youcefkel4743 2 жыл бұрын

your presentation is truly amazing dude . "showmanship"

@gbenga9811 5 жыл бұрын

I enjoyed watching this. Good sense of humour

@drlogiq1494 5 жыл бұрын

10:30 caught me off guard but I LOVE IT!

@wonjaechoi2762 9 ай бұрын

I love how you explained these complicated things as easier :)

@JMgamerZzz 2 жыл бұрын

So good man, i thought of that compiler chain a while back when i started programming Ive been somewhat trying to make my own compilers a few months ago. Looked at Lua, as you meight know its interpeted, but not in text form. Lua actualy compiles it into virtual machine instructions. And i tried to write a compiler for that since its easier to get in to. But i haven't finished it yet. Anyway the video was super good, great work

@lemonsh 4 жыл бұрын

Man! I have to thank you - I watched this video three months after it has been uploaded, and was a beginner in python. I thought "python is great and i will stick to that", but when you said "python scripting" I was absolutely amazed with this compiler magic and started learning C#, then Java, C++ and even x86 asm! Now, I came back to this video and realized, that without you, I would never learn these languages! Now I'm a junior Java Developer. Again, thank you so much.

@williamdrum9899 2 жыл бұрын

Good luck to you. I looked at the 8086's assembly in DosBox for about 5 minutes and noped right out of there. Funny how the most popular CPUs have my least favorite assembly languages.

@FelipeMaffezzolli 5 жыл бұрын

Thank you! That's the content I've been looking for ...

@AmazeAngeloGames 3 жыл бұрын

Really

@thedigitalodyssey1103 2 жыл бұрын

In simple programs like the one in the video, the compiler will usually optimize to minimize the number of stack pushes and pops. So in this example, with optimization, "x" would actually end up being a register with 3 being pushed into it, but without optimization, you would expect this.

@gemmagemma9726 Жыл бұрын

Clear and fluid presentation. Thanks a lot!

@ashismandal7776 5 жыл бұрын

Just one word : Amazing!!!

@scptime1188 3 жыл бұрын

"You only did python scripting?!" me, trying to teach myself python:

@rafaelojeda 2 жыл бұрын

The quality of this video is top notch. Please make more :)

@lorenzobosisio3838 3 жыл бұрын

I love the care that you put in editing and I am impressed by your intelligence. Hope u read this

@prettypointlessvideo Жыл бұрын

I've always wondered about how the first program was developed. I guess programming is based on electronics in a very naturalistic and physical/chemical way with transistors etc. Amazing

@honordevs Жыл бұрын

"All you did was Python scripting?!" This line hit way too hard for me. I started in C++, like most kids in HS, forgot it, then went to Python. Now, I code in Rust more than anything else, but I remember that learning curve and feeling like I had no idea what was happening.

@ipodtouch470 2 жыл бұрын

Nice video ser was a great introduction to my ‘intro to programming languages’ class and intro to architecture and assembly language class.

@vrjb100 11 ай бұрын

There were even processors that used apl as the machine code. Besides of compilers, there are also transpilers that for example transpiles typescript to javascript. Worked on transpilers for cobol to java.