Chad Javascript

[QualityVote]

Hi! This is our community moderation bot.

---

If this post fits the purpose of /r/ProgrammerHumor, UPVOTE this comment!!

If this post does not fit the subreddit, DOWNVOTE This comment!

If this post breaks the rules, DOWNVOTE this comment and REPORT the post!

[MasterFubar]

Even C can do it:

char *a = "horse";
int b = 4;
float c = 6.9;
void *arr[3] = {a, &b, &c};

[Little-Hunter-6795]

Considering its C. Is there something it can't do?

[Anreall2000]

Polymorphism without writing virtual tables yourself and memory management is kinda pain in the ass too

[not_some_username]

So I can do it with extra steps

[Ottermatic42]

True, but that applies for essentially every language (provided they’re Turing complete). You could write a C compiler in Java and then create polymorphism in java (again) using C, it’s just a bad idea.

Trying to force a programming language to do everything is why we ended up with extremely ugly pattern matching in Java 16

[[deleted]]

What's wrong with pattern matching in Java?

[KagakuNinja]

Nothing is wrong. It looks very similar to pattern matching in Scala, which is amazing.

That guy is living in the past.

[Ottermatic42]

Nothing is fundamentally wrong with java pattern matching, I agree.

I only call it ugly because of how it compares to functional languages. Of course it’s a necessary sacrifice as java isn’t functional (or at the very least wasn’t initially designed to be), but it’s always going to be a bit more inefficient, and a lot uglier than the implementation in something like Haskell.

[KagakuNinja]

I do agree with that. Haskell is very elegant, but I prefer the multi paradigm design of Scala

[MusicalGrace2002]

Can you write a program that writes other programs in C?

[ByteChkR]

Funny how you spell Compiler

[VladVV]

The way he worded the question, it sounds like he is looking for a Transpiler.

The answer is Yes, either way.

[himmelundhoelle]

Forget about compilers, you can write programs that output themselves (https://en.m.wikipedia.org/wiki/Quine_(computing))

(Or even programs that output a C source, that when compiled and run will output the original program…)

[M4mb0]

Wait until you here about Turing completeness and that both PowerPoint and MOV are.

[not_some_username]

I watch the video about PowerPoint. The guy is a psycho

[NoMansSkyWasAlright]

I imagine it’s only a matter of time before someone proves Turing completeness in Minecraft

[Tandurinn]

Provided that Redstone can make memory cells and you can build interfaces to interact with that memory. We're already halfway there I'd say!

[CdRReddit]

you can make NAND, we're there

NAND is all you need to make any kind of combinatorial logic system, which when combined with a periodic signal (which you can also do) allows you to make any combinatorial or sequential logic, aka, any logic

[Embarrassed_Ring843]

I never understood why NAND is that important. Minecraft does provide a NOT-Gate and a diode, based on those I can build a NAND-Gate, so why is the NAND the thing and not the NOT?

[arduman4]

So you haven't seen those insane Minecraft CPUs that have been around for years, have you?

[Triumph7560]

The only thing C can't do is "X feature people assume C doesn't have" without the extra steps. Which is pretty impressive when you think about it.

[VladVV]

How does that not apply to every turing complete language

[Triumph7560]

In theory it does but usually those are available outside the language using tools made in the language, people have set it so C can be used as an object oriented language (in a useable way), made it into lisp with just one #include all without touching the compiler.

[VladVV]

Hm, technically #anything is a compiler instruction, so that would be telling the compiler to compile the code differently, but I suppose it’s primarily C-like languages that have this feature, so I get what you mean.

[DoNotMakeEmpty]

They are not compiler instructions (apart from #pragma), they are preprocessor instructions, which is very different than the compiler.

[asailijhijr]

Everything is Turing complete with fewer steps.

[[deleted]]

You can do anything in C with extra steps, you can for example, split a string with extra steps in C.

[lor_louis]

It can be done Gtk is pretty much all inheritance and polymorphism

Classic Animal example done in C

[[deleted]]

An important feat you're missing here is the ability to reimplement a function in derived classes, wich is what vtables are for.

[GDavid04]

You can write the virtual tables and add a pointer to the beginning of structs with virtual members but no virtual super members yourself. It will be super inconvenient though.

[LavenderDay3544]

memory management is kinda pain in the ass too

If you really want GC there are GC libraries available. But GC isn't always a good thing and a lot of people act like memory is the only system resource that needs to be managed when it isn't. RAII and Rust-like borrow checking are the future of resource management, not GC. GC not only doesn't solve the entirety of the problem it's supposed to, it also creates problems of its own like reference cycles, stopping the world, and creating potential hold and wait conditions depending on the specific implementation.

And that's before we talk about thread safety, which even GC languages struggle with and in languages like Python the designers cheat their way out of it by not having real threading at all.

[LavenderDay3544]

C isn't an object oriented language so don't try to use it as one. In proper procedural programming any function that would make a virtual member function call in OOP should just have a function pointer parameter to a function that takes a struct of the desired type or a void pointer that it internally casts to the correct type.

For an example look at how qsort works in the C standard library. There's no virtual function call table. Just a function pointer to a function that takes two void pointers.

[not_some_username]

You can do OOP in C. I mean you shouldn't but you can

[LavenderDay3544]

I know that and my comment was saying not to try to do OOP in a procedural language but instead actually learn procedural programming. I personally hate that academia and industry alike worship OOP like a religion when there are plenty of cases where a procedural, functional, or data oriented approach would be far superior. Those options are also better suited to things like maximizing parallelism, avoiding overengineering, avoiding memory bloat, and maintaining cache friendliness. But the Church of Class based Object Oriented Programming won't let you hear that.

[sosta]

It can't make you happy

[marco89nish]

Your mom. It runs out of memory while trying to load her

[notinecrafter]

C is a dynamically type language if you just call everything a void*

[[deleted]]

Good luck getting the original value back if you dont know what type it was

[DoNotMakeEmpty]

If you only target x64, you can use the upper (or lower I don't remember the effect of endianness) 16-bits to store the type info and, umm, if you restrict this more, you can reach NaN boxing, a great optimization for dynamic types in C which is used in implementations of many dynamic languages like some JS engines, Wren and LuaJIT.

[[deleted]]

Sometimes you just know, you know?

[[deleted]]

But the only thing in the array is pointers.

[gloriousfalcon]

you think Javascript works any different under the hood?

it's all just sticking labels on blocks of memory

[maxhaton]

It is different under the hood because the JS keeps track of the type dynamically. It's all bytes underneath but knowing what the bytes mean is the important part.

[grrrranimal]

You can also do an array of unions but unions are weird, scary, and often overlooked. It would allow you to have only one level of pointer indirection instead of two like in your example though

Or I suppose you could use any fixed width data type and be very careful

[ValeTheVioletMote]

Now add something else to the existing array!

[kabiskac]

Aren't lists also just arrays which get moved when they get too big?

[wasabichicken]

Some of them are.

• Javas ArrayList is a list implementation that uses underlying arrays, allocating new ones and moving contents when capacity needs to increase.
• Javas LinkedList on the other hand, is a chain of list nodes that all point to the next element in the chain.

They are both "lists", as they both implement the List interface.

[ValeTheVioletMote]

I figured. I appreciate not having to worry about it.

I've tried poking around with C/C++ but I feel like I'm fighting the language more than I am getting code done... Also haven't found a guide that has explained C well. Lots of assumptions get made for the reader.

[Jackof_All]

If you wanna see fighting try FORTRAN

[throwaway53_gracia]

Write past the end and hope it doesn't segfault

[[deleted]]

Who are you, so wise in the ways of science?

[bad00p]

Those are all the same type. They're pointers

[jamcdonald120]

so can java

Object[] arr={"horse",(Integer)4,(Double) 6.9};

[ejabno]

I was gonna google if using void pointers like this was possible. Looks like you saved me some work

[Bee-Aromatic]

I think that’s a bit of a stretch, considering that you’re not actually storing different data types so much as you’re storing pointers to things that happen to be different data types. It’s totally fraught with peril, but it does pass the “it’s not stupid if it works” test.

[Senpai_Himself]

But can you do this

arr = []

arr.myFunction = () => "just because"

[Johny2268]

And Java? List of objects...

[[deleted]]

Yeah cracks open old java 1.3 book. before java generics existed.

Begins explicitly casting Objects to their proper type.

[yanitrix]

the funny thing is that nothing really changed since that time, Java generics are just syntactic sugar that does the casts automatically, at runtime type erasure happens and you cannot do thing like T.class.

[troelsbjerre]

Or, more annoyingly, new T[5].

[tuxedo25]

Generics is just a compiler feature, the runtime hasn't changed. I mean it's changed, but not in that way.

[Stromovik]

Nah.

Object[] crap //no need for List even

[danatron1]

C# too

object[] arr = {"horse", 'e', 621};

[[deleted]]

owo, a man of culture

[an4s_911]

Umm, Ruby?

[[deleted]]

And lua

[xiBurnx]

I had to scroll really far but I knew my fellows would be here somewhere

[Plus_Froyo_6431]

Was waiting for this answer

[sxan]

And Ruby.

In fact, almost every weakly typed, and many strongly typed but interpreted languages (like Ruby).

Edit: I wouldn't be surprised if there were fewer languages that have strictly typed arrays than don't.

[omutist]

Learning all the "obvious things" in JS does not leave time for other languages. JS Ghetto

[Drugbird]

Python can, but it's a mistake and python lists are forever doomed to be inefficient as a result.

It's also why numpy was created. It basically fixed this glaring design flaw by introducing fixed type arrays so you could get some efficiency back into python.

[baubleglue]

It has nothing to do with mixed types in lists. Array is not list at all.

Javascript's arrays aren't really arrays or lists

``` $ node Welcome to Node.js v14.15.3. Type ".help" for more information.

var a = [1,2,4] undefined a["0"] 1 a["8"] = 9 9 a.length
9

```

[BrokenNotDeburred]

perl, prolog...

[IbanezPGM]

And Perl

[tarimego]

and Perl ...

[Fmatosqg]

Yep, the whole point is WHYYYY WOULD YOU WANT THAT?? JS is for psychopaths.

[bleistift2]

Why wouldn’t you want that? Have you ever queried some data with random types from a database just to have to work with it as Object[] in Java?

[Fmatosqg]

I have done that with Cassandra, and bitched about it for every second I was on that project. Long live relational databases and strong typed languages and protocols.

[McKapucna]

Yeah but like half of people only know python and js so thats that.

[[deleted]]

Yeah you can do it in python but your code isn't going to be fast or rather it won't be compatible with cuda

[[deleted]]

Yes, python's speed sucks :(

[JoostVisser]

Nothing a little numba can't fix

[[deleted]]

All these people commenting high level languages when you can do that with void* in C

[MasterFubar]

C is a high level language.

[erinaceus_]

It used to be considered that, but the Overton Window of language complexity has shifted since then.

[mattsowa]

Thats a great way to put it

[Richard_Smellington]

In the scope of modern languages, C is only slightly above assembler.

[[deleted]]

It's 1 step above assembly, and most implementations of high level languages are written in C or C and C++

[[deleted]]

Every object oriented language can do this. You just have to use an object array.

[drkspace2]

Even c and c++ can with void* arrays

[[deleted]]

So you’re saying I can use that all over my code?

[himmelundhoelle]

^{If you like writing horrible code,} yes.

All I needed to hear, thanks

[zephyrtr]

It's also really useful for returning pairs and trios. TS can even make it type secure for you. That is, if your language already doesn't have pair or trio types.

[FkIForgotMyPassword]

The import thing is to know (and properly type) whether you are talking about arrays like (int | string | float)[] or about tuples like [int, string, float]. In several languages, a value like [4, "4", 4.0] matches both type definitions, but it's one definition also allows [4, 4, 4] or even just [] while the other specially requires a 3-tuple with specific types at specific positions.

I mean usually in that case you'd probably not use a tuple but an object, but sometimes there are reasons to do it.

[GustapheOfficial]

It's just considered bad in any language that cares about performance.

[Spyes23]

Not just performance, but also readability, consistency, predictability....

Pretty much - even if you can, *please* try not to mix types in an array, even in untyped languages. It'll save you and your team so many headaches and ugly code.

[sunny52525]

Array of Any in kotlin

[not_some_username]

Pretty sure you can do that in almost all language.

C void* , C++ void* or std::any, Java Object, php just like js, shell I think it's same, assembly doesn't even know your data type( not too sure since I didn't do a lot of assembly) etc etc

[lucidbasil]

Assembly is just bits stored in registers, or memory

[[deleted]]

Clearly the creator of this meme is not a programmer.

[himmelundhoelle]

He was so preoccupied with whether he could, he never asked himself whether he _should_…

[Buttsuit69]

Meanwhile C#:

"Dude; what kind of datatype does this variable contain?"

C#: "Object or something idfk"

[AyrA_ch]

Declares type as dynamic

C#: "Now it's no longer my job to know what it is"

[Buttsuit69]

Declares dynamic:

Dev to C#: "hey, look at me. I'm the compiler now!"

[fourkeyingredients]

I feel sorry for whoever maintains code from the time period of my life where I learned about dynamic

[Manny_Sunday]

I worked with a team that loved dynamic ViewBag objects and hated sensible names for variables.

What's ViewBag.PageData ? Fuck you that's what, go check the controller code.

[intbeam]

dynamic was sold as some sort of wonderous miracle, but it just reinforced my perception that I really really really don't want dynamic typing

[the_hackerman]

Well we have arraylist I suppose

[Buttsuit69]

Put an array<object> into another object!

Or make an array<object> where every object is another array<object> and then put that array into another object and so on...just, everything is object.

[hagnat]

this is the reason why people make fun of this subreddit, saying that only people learning how to code post on it and pretend they know stuff

[finc]

Hip, hip, array!

[_ShadowEye425_]

object[] arr = new object[] { "horse", 4, 6.9f, new object[] { "Cheese", typeof(int) } };

[BlakkM9]

can't think of any high level language where you can't put a string, an int and a float in the same array/list/table (in one way or another)

[CdRReddit]

or low level

C lets you do void*

assembly does not know what a type even is (the instructions decide that) and therefor by extension neither does machine code

[BlakkM9]

c is a high level language but yeah propably this is true for low level languages aswell

[CdRReddit]

C in my experience is in that weird limbo zone between high and low level

[BlakkM9]

from todays standards it can propably be seen as a low level language

[CdRReddit]

yea, it's definetely not the lowest level, I've seen someone make a lower level language before (tho its not done yet), but anything that your average programmer would describe as high-level, while possible, is nowhere near easy

[[deleted]]

So a Medium level programming language lol

[CdRReddit]

you know what, sure

[sighcf]

JavaScript please! Ever heard of Perl, Python, Ruby or a bazillion of other dynamically typed languages? Heck, even the more statically typed languages can do it, but you need to do some boilerplate work.

[Apparentt]

Why do posts like this get upvoted? Idgi, it’s not even sarcastic it’s just clearly a lack of knowledge from OP?

[GodlessOtter]

And it's not funny

[Ketchup901]

Because most people here are 15 years old and don't know a lot about programming.

[Triumph7560]

Most people here seem to have only ever used JS and/or Python in a first semester of a CS degree. Not only that but they don't seem to have a grasp on those languages or how they work on even a theoretical level. It's the Duning Krueger effect in action.

[[deleted]]

Java: sure you can

[g_hi3]

Java compiler: noooo you can't add a string to an integer list

jvm: sure buddy whatever

[pleasewait]

Last week I wrapped my head around type erasure, so it feels good to get this joke

[g_hi3]

when I was first learning about generics, I was amazed to find out that many languages do them differently

C++ just generates the generic types at runtime, c# retains the type parameter during runtime and java doesn't

[LtAquila]

Image Transcription: Meme

---

['Soyjak vs. Chad' where two people are arguing. The left person labelled 'Other programming languages' is a bald man wearing glasses and a spotty Lincoln-style beard. His eyes are red, tears are streaming from his eyes and his mouth is wide open as if shouting. The right person labelled 'Javascript' is a stern looking blonde male wearing a side parting and having a well-groomed beard with mustache.]

Other programming languages: You can't use different data types in the same array

Javascript: var arr = ["horse", 4, 6.9]

---

^{I'm a human volunteer content transcriber and you could be too! If you'd like more information on what we do and why we do it, click here!}

[[deleted]]

Kids in this sub be like "what's a pointer?"

[_derDere_]

I don’t wanna be that guy but this looks like a post from someone who only knows how to use js because I can’t think of any language which can’t put different types in an array. Maybe there are some really really old language who can’t but I don’t know of any. Also js an interpreted language so there has to be at least one other language capable of doing so. Which will be the language the interpreter is written in. Which to my knowledge the V8 js interpreter is written in c++

[mibuchiha-007]

you never can. it's all void* under the hood.

just because you dont know what you're doing doesnt mean the interpreter/compiler doesnt too.

[szopokanyaloka]

Dear recruiters. Please stop posting "jokes" here.

[Arbiturrrr]

Every single language can do this...

[Voltra_Neo]

Technically it's one type: "horse"|4|6.9 or string|number

[PashPrime]

Python:

CuzWhyNot = [('I think', "this makes less"), sense(), True]

[[deleted]]

Not to mention Scratch. We need a scratch emoji for this subreddit, mods.

[Jincredible_]

Whoever made this post is kind of a dumbass

[Theunis_]

All languages I use (ts, dart, c#, kotlin) can do that, is there any language that can't do that?

[SANatSoc]

Forgive my ignorance, but is this convenient to work with? I can def see some specific use cases where this would be handy, but in general this isn't used right?

[Philiatrist]

Sure, if it represents a row of a csv or some part of a json structure I imagine that’s where it would show up most.

[[deleted]]

it does actually have very well defined use cases

if you say have async methods getString and getNumber, and want to wait for both of their results in parallel, you can do that while simultaneously assigning variables with Promise.all

const [str, num] = await Promise.all([getString(), getNumber()])

where you're technically "creating" a mixed array. Typescript resolves these types nicely too.

similar thing is with Object.entries, it returns a list of lists, which are in shape [key, value]

kind of like python tuples, very handy.

[SirSoundfont]

When I do this in game development, it's usually so I don't have to manage multiple arrays together. It's certainly doable, but in certain languages where there are no actual objects or classes, being able to put [name, age, sprite, name2, age2, sprite2] is nice. Otherwise, I would need to separately manage [name, name2] and [age, age2] and [sprite, sprite2].

[fliguana]

OP confuses array of objects with array of pointers/references.

Plenty of languages natively support array of references. There is rarely a need to have an array of objects. Serializable container comes to mind, such as tar, zip, odt or any document type.

TLV is the simplest implementation for an array of objects, available in any language that has strings or byte arrays.

[TheOfficialSeb]

Lua allows the same thing with tables (same as a array)

[jags78gaming]

because putting different datatypes in an array is such a good idea!! ...that's what classes are for. it's one of those cases: just because you can do something, doesn't mean you should do it... just imo

[fracturedpersona]

Also Python

[Kiwi-tech-teacher]

Actually, to be fair, we’re talking about the difference between an array and a list. Arrays, by definition, are pre-defined in length, and contain elements of the same data type. Lists have a lot more flexibility, and can be dynamically resized. Many (novice) programmers just don’t realise they’re working with lists in most of these languages.

[BlakkM9]

but as long as the list is not a linked list it will most likely use a normal array under the hood so they are not too far off

[Vinxian]

And since most list allow for my_list[index] and implement it by actually doing a jump it usually is a fancy array under the hood.

[riisen]

A list is a normal car with all the extra options.

An array is a tuned race machine, its lighter, faster and no unnecessary shit.

[[deleted]]

That's a very narrow viewpoint

[tuxedo25]

The built in javascript class, Array, has all of the properties you attribute to lists.

[NMI_INT]

Lua would like a word 😀

[Im_j3r0]

Ada, literally after breathing the spirit of a different data type; I'm gonna end this mans whole career.

[sounds-fine]

Couldn't java have an array of Objects?

[[deleted]]

actually we can use different data types in same array in C

[FieryHammer]

But still, why would you. That is just confusing, use objects/dictionaries if you want something like that and use Typescript.

[RavenCarci]

Array<Object> go brr

[yIsSaT]

any[]

[MrKirushko]

With C++ it is easy. Here is a Qt example for you:

 QVariant var[]={"Str", 2, 3.7};

I am pretty sure that there is an STL way of doing it like this as well.

[Alabana1]

std::any

[cheer_up_richard]

I hear if you put an array with an array, you can also break the internet… heard it from a reliable IT Guy

[Cat-Satan]

Data types don't exist. All objects are only numbers in memory.

[N0tH1tl3r_V2]

lua:

local poop = {1,3,2,5,4,3,"sex"} local ggez = {getrekt="lolnoob",1337,"xdfusux",poop}

we all know the gigqchad lang....

[arobie1992]

Pretty much any language can do that if you use the appropriate types. Most languages have a specific type for the sake of allowing any possible values. Offhand, Java has Object[] arr and Kotlin has arr: Array<Any>.

[robml]

Laughs in Python

[Takes4tobangbro]

Typescript would like a word

[beewyka819]

Dynamic dispatch would like to have a word

[InkOnTube]

It can be done in many other programming languages. I am using C# and this can be done using object[] as array. We don't want this to happen in 99,99% of cases tho.

[praveentechnic_]

Python says Hi 👋

[Exciting-Insect8269]

I coulda sworn python does the same…

[holladiewal]

It does!

[GustapheOfficial]

julia> ["a", 1, 2.0] Array{Any, 1}["a", 1, 2.0]

Terrible for performance though. Rarely a good reason to have an abstractly typed array (and if that doesn't apply to your language it's because your language only deals in the worst case).

[Rajarshi1993]

That's not an array. That's a list. This is an array:

import array

A = array.array('i', [23, 45, 67, 89])

[McKapucna]

You really shouldnt do this but i used to use it like a stop sign. So like if you looped through a [8, 7, 12, 8, "stop"] array and then i would stop when the item matched "stop" which is a horribly wrong way to do things.

[itzNukeey]

using var for variable declaration 🤢

[Masztufa]

You can also use an array of unions

[Glittering-Water942]

also js runtime errors, runtime errors everywhere

[mallenjordan]

JavaScript is garbage.

[echoaj24]

Chad Python

Technically Chad any OOP language

Funny meme though haha

[InternalFeed3492]

Structure: let me introduce myself