I have zero respect for memory.

These "borrow checks" work only for the most primitive cases around stack allocated flat data structures. Real applications use mostly arrays of polymorphic objects, not integers, And these objects reference one another with cross-references. How Rust handles these data structures, how it prevents memory leaks in these cases?

Rust doesn't protect you from memory leaks dude.

nibba what

2:10 When capitalism solves programming problems.

Constructive criticism: I think this won't work very well. This doesn't encourage you to learn more, and continue learning. As a practice tool I can see this kind of working, but as a general way to learn a language - it just won't work.

I prefere c cause any type has the freedom of being entirely allocated on the stack, static heap or dynamic heap. I also like treating bools like ints and inlining my logic into jump tables using 2d matrix of of function pointers so false false is [0, 0] true false [1, 0] or true + true and false + true is [2, 1] I think rust is great for low level embedded applications but not for drivers and systems programming.

Java would NOT leave array on the heap in these examples. See "escape analysis". Java would work the same way as Rust. Of course, in compicated cases, array reference may eventually escape few scopes away and be left on the heap, but we can find equivalent example for Rust when this happens too.

Ok, so hear me out on this: smart pointers in C++

Wow so rust reinvented unique ptr waow 😊

i love your videos but your voice is annoying

what software do you use to animate this? i would like to know

Nice video, I'd like to share how this 2:53 is similar to how C#'s span works, the span is automatically freed when it exits the scope. { var array = new int[10].AsSpan(); } // The array is dead now, no heap allocations, no GC. 🚀 You could also just allocate on the stack (via stackalloc), but that is not a good idea for bigger arrays.

I'd like to add onto the garbage collector explanation that there are multiple types of garbage collection strategies, Java has a mark and sweep strategy, which marks memory accessible from the running program and sweeps the rest at regular intervals. Other languages like PHP use reference counting, where memory is reclaimed as soon as nothing points to it. They each have their advantages and disadvantages.

too much vocal fry

Before posting such a ridiculous claim, you should have checked the RAII. This makes your Rust so cool, to destroy something when goes out of scope. C++ smoked this long time ago. Rust has better implicit move semantics management in compiler. But RAII is C++

Actually, you picked a really poor example at the start. The issue is not with programs that just forget to clean up resources and then exit. The kernel keeps track of heap allocations and once the program terminates it just frees that memory right up. This is technically a memory leak, but it has no effect on a modern operating system. While this is not best practice, this is perfectly safe and fine to do. What you should have gone with are applications like Kernel Modules or Daemons that continually run in the background but never use free() to give back memory. Those are a much bigger problem as they constantly call for more and more resources, but never free them. This will, over a long enough period, cause an _actual_ memory leak. And to be completely honest: Rust fanboys WAY over-hype memory leaks. Worst case the Kernel denies the resources and you get an error which crashes the program and frees everything anyway. Rust fanboys really need to stop acting as if memory leaks are a thing that every application needs to care about. In 95% of applications you won't even notice that they occur. Yes, those 5% of applications benefit from it, but that is no reason to rewrite all of the programs in Rust.

Why in Java, when "arr" is popped out of the stack, does the system not automatcally frees the memory referenced by "arr" in the heap?

"Rust is good because..." "Erhm achshually..." It's the amps vs volts debate all over 💀

Rustroon

When you say "Rust might be the best programming language", you blatantly ignore the functional ones

I'm building a programming language dose dose reference counting at the compilation level public and static -- exposed one immutable the other not , local -- stack and private I maintain memory buy counting references during compilation when references hit 0 it's unallocated (done right after the last reference is nulled ) it dose have self-referenece issues of which the complier will have to figure out

So I'm not getting something, why not just make arr2 point to arr, and since arr is being pointed to it doesn't go out of scope until arr2 does too?

Where is C++ comparison?

Why does your voice sound like it's constantly dying?

HoW RuSt FoRCeS yOu To ReSpEcT MeMorY, go learn modern C++ pal

i dont get it. unique_ptr also can have std::move so whats different?.

People saying "you can write memory safe code in C++ if you just git gud" the whole point is that working in C++ is annoying, it just sucks, even if you're good at it (maybe you like it, but that doesn't change the fact that a LOT of people agree with me). So what actually happens, especially in multi-developer code bases is you have one person who actually tries to make their code safe and basically everyone else just cuts corners and bodges it together. Rust really shines in those situations because when i write my code i can, with a fairly high degree of certainty, trust that their code isnt a complete house of twigs that will blow over at the slightest breeze. And sometimes when youre writing code for a long period of time you learn something new and realize your past self was that person bodging shit together, but in Rust even idiot past you had the vast majority of sneaky bugs taken out of the possibility space. It's not meant to be an impenetrable fortress where memory safety is never an issue, but in the vast majority of those situations the signage is blaringly obvious. Oh, I'm in an unsafe block with 3 lines of code? Probably gotta do the thing that C++ devs have to do for their entire code base. Thank God it's 2 lines and not 1000 abstract classes and an inheritance chart that looks like the Habsburg family tree

I highly recommend learning rust... you don't need to use it, only learning it will rewire your brain on how you code your applications. For me, it made me a much better C and C++ programmer!

0:35 of a video and already i can say skill issue

Idea is good. If only they could adopt Java syntax to make it more programmer friendly it would be perfect.

first, they told me to respect ring zero. then they told me to respect women. now they tell me to respect memory. but there was no one left to respect me

Rust hasn't invented anything, that's already in C++ with smart pointers

So the tl;dr is Rust generates the free() so you don't have to

I mean, I like Rust, but sometimes I don't need these restrictions in my way. I would prefer the freedom of C. Besides, there are analyser tools that can help locate potential memory leaks. The beauty of C is that one can imagine what the assembly code would look like behind the scenes, with Rust's abstractions it would be more difficult. You pay with overcomplexity for just not having to free memory yourself. All you have to do is use tools that help you locate problems in the code where memory leaks could be, OR design your C code that way so you don't have memory leaks (so that you know for sure where all allocations and deallocations are). With Rust you would still have to design your code to comply with borrow checker anyway. Rust could be a language for perfectionists, but you can still be one using other languages.

dude your voice is that on purpose

Hipsters performing mental gymnastics to not use valgrind smh

With garbage collection, every object has ownership, hence better.

This all works fine with hello world example. Good luck with implementing something real in Rust

Where can you learn this kind of topic? I feel like, i'm still missing a lot of information that i should've know. I want to understand more the java lang. Where should i start?

the fact people still need to sell this language to get people to use it instead of just using it 😆 what a joke

Is this the same concept as C++ smart pointers?

Unfortunately I’m stuck modifying a C++ codebase, it’s a shame because I’d love to use Rust but I don’t have the time to rewrite this entire framework in Rust 😂

ah yes, the assignment operator actually _moves_ things! what a well designed language.

3 words before the end of every sentence you run out of breath, can you please talk normally? it is disturbing

best visualization of memory i've seen

Powerful and well designed language 🦀

I know its off topic, but your animations are really smooth. I especially liked the transition between blocks of code. How did you make those?

A better solution is to combine rust's approach with reference counting.

I too pray to the god of safety. Even people with the best intentions run into the sea, that's whyI wear a life vest. Only thing I refuse is to debug. Not part of programming for me and I hope I never encounter such a situation.