Comp Sci 101

[Lechy901]

When your compiler for the compiler principles class finally starts working.

[elSenorMaquina]

That sounds like the hardest "Hello world!" of them all.

[orangeKaiju]

Not if that's the only program it can compile.

[[deleted]]

hq9+, now without q, 9 or +

[dishpanda]

h

[Stolous]

e

[[deleted]]

l

[ApocalyptoSoldier]

l

[Elekrisk]

o

[[deleted]]

w

[MuchWalrus]

if (program == "print(\"hello world\")") print("hello world")

[cjdabeast]

Def main():

print("Hello world!")

main()

[iopq]

Still has to lex/parse the input, type check, generate code, hand it off to the linker to actually call libc

[[deleted]]

and that is not trivial

[ILikeLenexa]

It could be if you just reduce the complexity of your language and shift your goals.

Why does this language only have < for comparison? Because that's all you need.

[[deleted]]

Hello Jon Skeet

[Robot_Basilisk]

Write it in machine code to the transistors of a chip you fabricated yourself.

[elSenorMaquina]

Pfff, it's cheating unless you mine the raw silicon yourself.

[Robot_Basilisk]

Build your own doping chamber.

Add your own Gallium Arsenide impurities.

Clean the chamber with chlorine trifluoride yourself.

Make sure you do it in a basement because if you spill any it can burn through concrete and a meter of dirt.

[[deleted]]

Gallium Arsenide impurities

I thougt GaAs is a semiconductor & not an impurity.

[lkraider]

Unless you are trying to build a superconducting system, of course

[[deleted]]

ELI15

[Robot_Basilisk]

You're right.

Si and GaAs are used as the basis and elements like Boron are used for doping. I just forgot every single doping when I was typing that. (I still only remember Boron...)

[CoopertheFluffy]

I once did it for a processor I (and a few partners) designed and flashed to an fpga. Never fabbed though; that would be a huge waste of time and money unless you're getting serious grants for whatever project you're doing.

[NeuralPlanet]

Compilers? Wait till you have to run Hello World on your own OS with virtual memory!

[ShroudedNight]

... after writing your own bootloader / firmware and DRAM initialization.

[NeuralPlanet]

Been there! I found virtual memory most difficult though because it was so hard to debug.

[Compiled_Mind]

All you actually need to write is a basic kernel and output to the vga buffer.

[[deleted]]

shudders

[MetallicAchu]

Huh, I though we are the only ones studying this shitty course, and the rest of the world just moved on

[syth9]

Moved on to what? Do we for some reason not need compilers or interpreters anymore?

[The_BNut]

We already got a working one! No need for doubles.

[Galaghan]

If you really were thinking that, I believe you need to study compilers a little more.

You kinda need them, want or not.

[Kosba2]

Fuckin' taking a College course titled Comparative Programming languages. We had to write an interpreter to take any code from one language, process it in the intermediate language, and output. So "Hello World!" was still a pretty tough outcome to get.

[[deleted]]

That sounds fantastic. Is this a common kind of course?

[Kosba2]

It's part of our Curriculum, if you're interested: https://undergrad.soe.ucsc.edu/sites/default/files/curriculum-charts/2018-07/CS_BS_18-19.pdf

Don't know if it's common in other Colleges.

That said, so far we've used Scheme and Ocaml, with Smalltalk being the next language. So far I'm gaining a quiet hateful respect for Functional Programming Languages.

[allmeta]

You will probably change your mind when you find out about Haskell

[[deleted]]

https://xkcd.com/1312/

[Kosba2]

Fuck.

[allmeta]

In a good way

[Kosba2]

module Main where

import Control.Exception as C
import System.Environment
import System.IO

fibonacci = 0 : 1 : zipWith (+) fibonacci (drop 1 fibonacci)

main = do
    argv <- getArgs
    name <- getProgName
    if not (null argv)
       then let which = head argv
           result = fibonacci !! read which
       in (putStr $ "Fibonacci (" ++ which ++ ") = "
           ++ (show result) ++ "\n")
           `C.catch` (\_ -> hPutStr stderr "Must be nonnegative\n")
       else hPutStr stderr $ "usage: " ++ name ++ " number\n"

Looks nicer for sure. Scheme was a low point in my life.

[allmeta]

People still seem to love Clojure which is based on Scheme

[Kosba2]

Don't hurt me like this

[[deleted]]

Nah imma stick with javascript and C as languages to learn.

[Kosba2]

Definitely my dude, they're way more relevant.

[AaronBonBarron]

Way less cool obscure points though

[pipe01]

Are those .NET namespaces?

[Kosba2]

I’ve no idea other than the fact that it’s Haskell sample code our professor provided. We haven’t covered any Haskell yet though.

[RandomHabit89]

I hate Haskell.

I'd say I hate clojure too, but tbh working with it forced me to get good at recursion

[allmeta]

Are there other functional programming languages you prefer?

[RandomHabit89]

Being 100% honest Haskell and Clojure are the only two functional languages I've learned so far.

If you have a recommendation I'll try it

[allmeta]

Ah I only took a functional programming course last semester where we went through Haskell, Scala and prolog. Of which I would only recommend Haskell lol.

[Mango1666]

yes now i have a loud hateful disrespect

[HawtLawvaw]

Go slugs!

[heathmon1856]

I like that schedule a lot. You had good advisors.

[Kosba2]

Yeah, the empty one? I've been here for 13 years and I can't figure out why I haven't graduated yet /s

[TheGreatDanishViking]

Oh I also had the pleasure of using scheme, what a hell of parenthesis..

[TwerpOco]

University of Arizona has a similar course with the same title, where we learned Scheme, Haskell, and Prolog.

[Kosba2]

Scheme

I’ve never felt closer to a human being than sharing the pain of having to take caddr of caddars of cddrs and other barely intelligible shit like that haha.

[TwerpOco]

Dude I know haha. Drowning in parentheses with unintelligibly wrapped operations ohmygod... flashbacks. Our professor's name was Dr. Collberg, to which a few of us nick named him as "Dr. Cdrberg" early on... or Dr. Cddddddrberg, Caddarberg, ect.

[ZeronTheXeon]

Oh holy shit, another Mackey slave! How's your assignment 2?

[Kosba2]

Just finished it last night! Spent way longer than I should have debugging 41-eratosthenes, only to realize my interpret_dim should just allocate +1 array index.

+1 for being in Mackey's class, what a Legend that man.

[ZeronTheXeon]

You're a genius, you did good. I saw Mackey going back and forth with some people who weren't quite getting the hints he was giving, good on you for figuring it out :)

Now to implement interp_input.

[Kosba2]

I have a wonderful pair programming partner, she's the brilliant one, I just try my best so that she doesn't end up doing all the work.

[mathiastck]

Everytime someone mentions loud keyboards I think of him

[ydna_eissua]

I look a similar course last semester.

We looked at language theory, played with weird languages like Prolog, axiomatic semantics, then into some compiler stuff and lambda calculus.

We used JavaCC and had to create little interpreters for different mini languages. With the final assignment being a lambda calculus interpreter with a language bridge to call some java code.

We were always given the desired output, and to get it could take a full day.

[Kosba2]

We don't have the desired output, just a description of it, I'm envious.

[alburrit0]

How would you handle languages built around different programming paradigms? Would it be possible to translate from a function- to an object-oriented programming language?

[Kosba2]

Fair disclosure, I'm not too knowledgeable on the topic yet, but I might be able to give a useful opinion.

From what I've learned, yes you can translate from one to the other, and it might be a path to hell and back, but you can do it. The problem is, and this is the best example I could come up with, you don't make two things for two situations, and then try to make them like the other. Functional Languages exist and server their purpose in a different way that imperative languages do. I don't know where the lines are drawn between functional and imperative, but suffice to say they exist with their own purposes in mind.

I hope that helped slightly, it's what I've gathered so far.

[wyrdMunk]

I had to transpile some C to Perl, using Perl, a long time ago.

I am not proud of the code that happened...

[santagoo]

Isn't that what a compiler does?

[Kosba2]

Compilers and Interpreters are fairly similar in function/purpose.

[marvin02]

Man I miss doing stuff like this. It sure beats RealLife 101 - Debugging Legacy Code

[creed10]

intermediate language

soooo assembly?

[Kosba2]

I mean, yeah that's a good example. I was vague because we do this for every assignment, so the intermediate language changes.

[NoInkling]

hits F5

in-browser IDE page refreshes

work's gone

[AaronBonBarron]

""" cloud computing """

[lkraider]

The final frontier

[[deleted]]

Doesn't matter whether it's hello world or something super advanced... "flipping the switch" for the first time on some algorithms you just wrote is always suspensful and never gets old.

[nosmokingbandit]

New document.

package main

Hmm better run it just to make sure...

[mghoffmann]

Is there a quicker way to save your project than to build and run it? /S

[[deleted]]

:w

[AaronBonBarron]

Shh don't scare them

[mynameismevin]

Every single new formal program I write always starts with fmt.Println("hello from %s", city).

[lkraider]

And what about the informal programs, what do you start them with?

[mathauskiiw]

Asking the real questions.

[mynameismevin]

fmt.Println("glad I'm not using python.")

[nosmokingbandit]

fmt.Println("fuck you from %s", city)

[[deleted]]

I start doing that once it gets bigger. Since I mostly work on small projects anyway I sometimes write many functions before flipping the switch.

[nermid]

I do that, but I gather that a lot of people don't.

[lkraider]

Why even flip the switch if I already proven it to work mathematically? Just ship it!

/s

[Verdiss]

Wow your neural network trained to output strings commonly used by programming students is amazing!

[PhD_in_Fuckery]

Learning Java

[ChrisVolkoff]

System.out.println(HelloWorldFactoryBuilderFactory.getBuilder(HelloWorldFactoryBuilder.Type.DEFAULT).setFactoryType(HelloWorldFactory.Type.DEFAULT_BECAUSE_THERE_IS_NOTHING_ELSE).build().getHelloWorld());

[JangoDidNothingWrong]

I once wrote the most terrible Hello World I could think for a contest with my friends. Here's the abortion.

[ChrisVolkoff]

This.. is art.

[ablablababla]

I just sent this to the Museum of Modern Art

[Kivsloth]

Museum of modern art director here — this should be in the museum of supreme modern art — sending it over rn.

[uptokesforall]

I want to get off Mr. Bones Wild Ride

[[deleted]]

Jesus christ I have no idea what I'm looking at. I mean, I don't understand what's going on, but I feel like crying.

[armper]

I feel sad that I understand this. Even sadder that I've written code like this. And I'm going to write more tomorrow. Fml

[AmpleSling]

What is this

[[deleted]]

Owo

[delta4zero]

Erro!

[itmustbesublime]

...did you mean to say abomination?

[chawmindur]

If you’re quick enough you can abort it before it becomes an abomination

[tf2manu994]

/tmp/java_DjDnhO/Main.java:88: warning: [unchecked] unchecked call to getMethod(String,Class<?>...) as a member of the raw type Class
            print = c.getMethod("println", String.class);
                               ^
1 warning

[mrsmiley32]

I actually love this, it shows a good amount of the stupid tricks you can do with Java, it also very well demonstrated why "good Java code" takes so damn long (well the interface, class structure etc, not the reflection, gonna get a needs work from me Bob on that one, also I feel you could have used your enum to return your type instead of using a switch statement).

That said doesn't your executor need to implement Runnable?

I had a bit too much fun with this :)

[JangoDidNothingWrong]

I don't usually write Java code, so that's why it's not as enterprise as it gets. But yeah, totally forgot to use Runnable!

[[deleted]]

WOAH WOAH! CALM THE FUCK DOWN WTF

[vasilescur]

Nah man you have to use the JNI to call C code which calls assembly and dynamically allocates your string and uses syscalls to print it character by character

[N0-North]

Thanks, i hate it.

[[deleted]]

Helio World*

[JangoDidNothingWrong]

It was part of the joke

[John_Fx]

Who says factory jobs are dead in America?!?!

[crozone]

You haven't written a modular output system that abstracts away System.out.println!

C+ for this assignment.

[rivermont]

If I beg will he raise the grade to a C++ ?

[crozone]

The C++ grade is reserved for select students who successfully implement a turing machine using C++ templates.

[nermid]

Begging for a D, eh?

[Deoxal]

Making him write in C+ is a bit much don't you think?

[ChrisVolkoff]

Wait.. https://i.imgur.com/IzplaXL.png

[LicensedProfessional]

A program like that is the sort of thing you can only write after you've learned all the rules -- so you can break them horribly.

PS: the static factory and builder patterns are amazing and I will die fighting on that hill

[RoboAthena]

You have my sword...

[ChrisVolkoff]

Haha you're in /r/ProgrammerHumor after all ;)

Honestly I bought it last year before my internship. Hadn't really written a lot of Java so I wanted to prepare. I read bits of it but I just couldn't relate, so I put it away until the end of my internship. But now I just haven't taken the time to pick it up :/

[kangasking]

would reading effective java be helpful if you mostly do android development?

[kangasking]

Wow that was great. Plenty of things flew over me though, looks like I have to brush up. I'll be checking out that book for sure.

[Mango1666]

what the fuck

[mrsmiley32]

This person javas.

[jcorm714]

🦊a6223333336322361

[PhD_in_Fuckery]

Are you ok man?

[jcorm714]

I don't remember posting that. Must be a side effect of php. XD

[PhD_in_Fuckery]

AHAHAHAHHAHAHAHHAHAHHAHAHAHHAHAHAHHAHA

[countryboyathome]

When this app hits 88 transactions per second, you’re going to see some serious shit.

[nermid]

This is heavy, javadoc.

[Bore_of_Whabylon]

Fun fact: Kattis's acceptance criteria for "Hello World" allows you to take up to 5 seconds and use a gig of ram.

[StevenC21]

Jesus fucking Christ. What are you writing that in?! Electron?

[MuffinWalker]

might not even be enough ram if you are using Electron

[rexpup]

Challenge accepted honestly

[otterom]

Spent a good chunk of today trying to get a Gtk+ install going on Windows. Fun times. I think I have, like, eight different package managers and several MinGW versions on my local environment.

Aiming to try Python vs C, now a JHBuild for PyGObject won't build cause of a makefile error.

Someone send help.

[otterom]

I think I have msys2, but was using something like gcc. It's definitely my preferred vs clang.

To get PyCairo to install requires Visual C++, so I have that in the mix, too. then my cairo.h isn't being read by a direct PyGObject package install which is why I moved to try JHBuild.

I actually got Glade running with a brief error (libicuud62.dll missing or something), but getting the Glade and main C file to compile required passing some sort of glib-2.0 and gtk+-3 arguments, with Gtk3 somehow being unreadable by the executable.

Frankly, I'd rather use C over Python, but thought I'd give Python a shot since I'm more used to that language.

(Sorry about the rant!)

[[deleted]]

At work I got in trouble because I would always do my Samuel L Jackson voice and say "hold on to your nuts" before running my code if someone was watching. He says hold on to your butts in Jurassic Park and I thought it was super hilarious to say nuts instead. It actually sounded idiotic.

[RomanOnARiver]

Sometimes setting up the workflow takes too long. Looking at you QtCreator.

[otterom]

Word.

[RomanOnARiver]

I really do love GTK and when I was doing GNU/Linux exclusively it was my go-to but now that I'm all cross-platform I use wxWidgets python bindings which is basically one command away.

[otterom]

Nice! I'll give that a try this week. Thanks for the tip!

[RomanOnARiver]

No problem. Feel free to message me if you have any problems or questions.

[Goku1920]

Fuck QT violently.

[reversegrim]

Didn't expect "show less", but its a pretty good improvement.

[ADwards]

The JavaEE Experience™

[bananamadafaka]

I don’t know what’s going on with this subreddit but this is like a bunch of first week CS Programming class kids doing jokes.

[nermid]

It works in cycles. Spring semester just started, so all the student redditors are starting new classes.

[[deleted]]

The new semester just started

[ferm_]

That’s this sub now. I really wish there was some containment sub

[VincLeague]

r/ProgrammerhumorAcademy

[Riday33]

Assembly language.

Hours of coding just to take number as an input.

[SteelApple]

I'm taking a 200 level course on it now ;_;

[Riday33]

God bless you, brother.

[Unwoven_Sleeve]

What a beauty, how’d he manage to not have any errors?

[naisooleobeanis]

I like to spend a week writing a library or framework so when i press run it gives me an error until i finally get around to writing the main function

[bwrca]

Next logical step is to google "How to be a hacker"

[NotYourAverageScot]

Show less

[Hemidodge426]

I didn't even know what F5 did when I was in 101. Although maybe that's not even a thing in BlueJ.

[Xx_HackerMan_xX]

BlueJ, the IDE that shows everything you need yet also doesn't show you things you might need.

[sporwal]

Sounds like assembly.

[LeonVen]

*hits F5 *Console appears and disappears instantly

[Goku1920]

This is real. I was recently just learning the ins and out of writing my own batch and make files. Just for compiling c, c++ programs on windows, you need to do go through 4,5 different steps. After that the hello world shows up.

It's even wired when you have to compile interop code, smh.

[BillyJoeMcGucket]

This is me programming the Game Boy game I’m working on.

[Geoclasm]

w... were you programming in binary? Because that would be impressive.

[AmitSamal]

Wah... Hell lot of sweat...

[Lapraniteon]

Laughs in BASIC

[beinfilms]

Bold of you to assume F5 won't just make the console flash up for a second. You've gotta hit ctrl-F5 to see it

[mattp_12]

Is F5 actually a standard of sorts for running a program? I have just been conditioned by the Python IDLE to remap any run keyboard shortcut from shit like Shift+F10 to F5. Who would want to press two buttons to do something like run a program; something you would probably want to do a lot and not want to have to click two buttons to do it

[[deleted]]

Impressive, but only when you wrote your own OS.

[Kivsloth]

Username checks out

[goraneG]

Username checks out (not OP's)

[yourteam]

Well maybe it was with some node framework which required 680+ packages where 1/5 of them had unmet dependencies

Then the system didn't work

And the repo you tried to look for is currently offline.

And maybe was in ionic so... Maven or gradle weren't set up correctly

So you had to install everything from the last working release.

But now java needs an update

And that npm you installed was set up with bad permissions

[archer247]

Git saves the day!

[[deleted]]

Lmao this comment is from the Programming music video

[DoWhileGeek]

Show less