No cp here mistar

What?

Isn't c++ good for competitive programming

Isn't c++ good for competitive programming

It was a joke about the double meaning of that abbreviation

~ is now approved by the group admin and can send messages without any restrictions Can someone give very simple explanation of the different between RAII and unique pointer? As far as i understand is (correct me if my understanding is wrong), unique pointer is raii, i do not need to write my own raii with class object { constructor() ~destructor() } but just writing normal class and create the object with std::make_unique, or std::make_shared if it will be shared See spam? Quote the spam message in the group and reply with /spam

unique_pointer manages memory (and the stored object lifetime) using RAII, so you don't need to manage these two parts manually when working with unique_pointer. However if your class has some resources that it needs to manage (e.g. opening and closing files, or DB connection) and those are not managed with some "smart" class that cleans up the resources automatically, then you may need to implement that management in RAII way even if your class is stored in a unique_pointer. To give a better explanation it would be good to see some code example of how you're using it.

I'm from Lancaster, MA

I'm from Lancaster, MA

and what?

I'm from Lancaster, MA

Welcome from Lancaster!!

It was a joke about the double meaning of that abbreviation

Wow, i thought everyone are serious here💀

Collaborative beginners in programming? Am in

yo

Yo

How did you guys leaned to code

a lady named CodeBeauty on youtube taught me C++ easiest and best so far; but i am still learning and i only learned basics from her then.

https://twitter.com/TrueCodeBeauty

a lady named CodeBeauty on youtube taught me C++ easiest and best so far; but i am still learning and i only learned basics from her then.

Chilitomatonoodle youtube channel is also great. And he has sense of humour, So it makes learning fun!

a lady named CodeBeauty on youtube taught me C++ easiest and best so far; but i am still learning and i only learned basics from her then.

Replying to 3yo msg…

Replying to 3yo msg…

smarter spam

Anyone freew

Anyone freew

#meta

Anyone freew

Don't ask meta questions. In other words, don't ask to ask. Questions like "Does anyone know XYZ?", "Has anyone used XYZ?" or "Can someone help me?" are all considered meta questions because they don't specify what your actual problem is. These questions give the impression that you want people to approach you and offer their help as if they don't have any other work to do. Now doesn't that expectation make you look like an idiot? If you have a question ask it directly. You are more likely to get a response that way.

5 applications I've deployed on my Raspberry Pi with K3s https://www.xda-developers.com/applications-deployed-raspberry-pi-k3s/

5 applications I've deployed on my Raspberry Pi with K3s https://www.xda-developers.com/applications-deployed-raspberry-pi-k3s/

Where C++ ?

5 applications I've deployed on my Raspberry Pi with K3s https://www.xda-developers.com/applications-deployed-raspberry-pi-k3s/

you misclicked when sharing the article...

I tried to learn coroutine yesterday, got plenty of segfaults and bus erros until finally I can run it. But I stil do not know the correct use case, does anyone here can help? >,<

Replying to 3yo msg…

i dont read in here as often as you do. i was something like 10,000 messages behind for a year or longer

smarter spam

just because i responded to an old message doesnt make me a spammer

i just simply am super far behind on most channels i joined. i usually dote on maybe 1 channel and i have 2 of my own

in fact i am still right now 10K messages behind...... i havent read even a fraction of them, yet

in fact i am still right now 10K messages behind...... i havent read even a fraction of them, yet

are you going to?

in fact i am still right now 10K messages behind...... i havent read even a fraction of them, yet

You don't have to honestly... You won't gain anything good from it

有说中文的吗？

有说中文的吗？

See pinned message

English only

I tried to learn coroutine yesterday, got plenty of segfaults and bus erros until finally I can run it. But I stil do not know the correct use case, does anyone here can help? >,<

Use case is mostly back-end dev where you need to put heavy stuff in the background until you use them

Maybe beneficial for UI programming too. To not block main UI thread and to not deal with the thread pool.

Is it equal to goroutine or async await?

I already know if it is goroutine or async await, if coroutine is equal to them then it is for non blocking IO

Is it equal to goroutine or async await?

It is an analogue of those

It is an analogue of those

Ah so it is for IO not CPU task

Ah so it is for IO not CPU task

Bro you can do what you want

Have you use it? How usually you use it?

Have you use it? How usually you use it?

I did not use those in C++

Cause I don't do backend in C++, if I had I would have

Bro you can do what you want

I do not think it is meant for CPU taks if it is analogous to goroutine and async await, because it will run on top of OS threads. Like 100 coroutines <-> 8 OS threads, 8 OS threads run 100 coroutines. It is how goroutine and async await are used

I do not think it is meant for CPU taks if it is analogous to goroutine and async await, because it will run on top of OS threads. Like 100 coroutines <-> 8 OS threads, 8 OS threads run 100 coroutines. It is how goroutine and async await are used

Everything runs on os threads

What is your point

thread pools and coroutines are to mitigate overhead on creation/destruction of threads

I mean for example single threaded app. It does not matter how many coroutines you create, if that coroutine render a graphic for 5 minutes, the OS thread is blocked for 5 minutes, coroutine does not makes it concurrent or paralel for CPU task. Only multiple OS threads can

I mean for example single threaded app. It does not matter how many coroutines you create, if that coroutine render a graphic for 5 minutes, the OS thread is blocked for 5 minutes, coroutine does not makes it concurrent or paralel for CPU task. Only multiple OS threads can

you still have to use your brain yes

You can make 5 different tasks

And send it to the thread pool

That will do the work needed in parallel

you still have to use your brain yes

I just correct a bit of your comment that it will not block the thread if it executing blocking task. Because that is how single threaded goroutine and async await works

Because you say it is like that goroutine and async await 😅

And send it to the thread pool

That is multi threads. Not multi coroutines. Multi coroutines without multi threads will be blocking

Because you say it is like that goroutine and async await 😅

Are you "ackshually ☝️🤓" me right now lol?

That is multi threads. Not multi coroutines. Multi coroutines without multi threads will be blocking

It will not block even on a single thread if implemented properly

Are you "ackshually ☝️🤓" me right now lol?

I do not understand, I am not native english :<

I do not understand, I am not native english :<

Being pedantic with 0 substance

It will not block even on a single thread if implemented properly

Pcs before 2005 had one single core and they run thousands of programs at a time

It will not block even on a single thread if implemented properly

To make it not in single threaded is never execute the CPU task :v you can not avoid blocking in long CPU task in single threaded. It applies to all programming as far as I know

To make it not in single threaded is never execute the CPU task :v you can not avoid blocking in long CPU task in single threaded. It applies to all programming as far as I know

Have you heard of interrupts?

That's how multithreading is implemented on single core cpu's

Have you heard of interrupts?

Context switch?

Context switch?

Yes

OS sets up an interrupt timer

After some time has passed it reallocates where does the execution goes next

You get seemingly "parallel" execution

Yes

I does not execute paralel, it just executes every task for some duration then moves to the other for some duration then come back again, some duration again continously

That is not executing 2 thing at the same time

I does not execute paralel, it just executes every task for some duration then moves to the other for some duration then come back again, some duration again continously

If it can play video while compiling your program it's good enough

This IS how OS work

But it just makes it looks like at the same time where actually not at the same time. I think you are mixing about concurrent and paralel 😅

It did that in the 90s already, with no multicore cpu's

But it just makes it looks like at the same time where actually not at the same time. I think you are mixing about concurrent and paralel 😅

We were talking about "blocking"

Does it block?

If it can play video while compiling your program it's good enough

I can not, you can not do 2 long running CPU tasks like that at the same time in single threaded

The answer is no

I can not, you can not do 2 long running CPU tasks like that at the same time in single threaded

You can. You will not get 2x speed obviously

In your OS right now is thousands of threads and processes