let's assume you have a server, you listen for multiple connections to come in and for perf reasons you want to execute them concurrently. Most operating systems offer you a function to register that socket to an internal data structure, whenever one of those sockets is ready you get a "notification" which socket it is and you can resume handling the connection. One abstraction level higher the connections seem to be asynchronous, potentially executing out of order.

Thread pool can solve this But As far as I understand async came to solve the high costs of threads(like system resources as Rust books explanation of Asynchrounounce mentioned that explicitly) So that means async doesn't use threads in its internal implementation

Yes, it can. But in practice the overhead is extremely high. You need to protect the access to data structures to prevent race conditions, your operating system needs to context switch between the different threads and so on.. additionally for a network stack you spent a lot of time waiting anyway asynchronous functions can but do not need to run on a different thread.

As far as I know Asynchronous means running on different context concurrently without blocking each other

there are synchronous and asynchronous IO. sync: make request and get data. async: set handler for getting data, handler is called if data ready

How does it wait, if it's not by using threads so that it doesn't block the caller and notifies it when it's ready

are you saying that it's a platform specific implementation or it's just a troll?😂

I am just trying to say you mess ortogonal entities like: async/sync IO with threads, coroutines etc

for example nodejs does not have threads, but it has async nature

Node uses threads under the hood

Node uses threads under the hood

this is like comparing parallel algorithm with threads

Can we use struct instead of class for linked list in c++??

What is making this code timeout ?😥 #include <bits/stdc++.h> using namespace std; vector<string> split_string(string); // Complete the squares function below. int squares(int a, int b) { int counter=0; for(int i=a;i<=b;i++) { float k=sqrt(i); if(k-floor(k)==0) counter++; } return counter; } int main() { ofstream fout(getenv("OUTPUT_PATH")); int q; cin >> q; cin.ignore(numeric_limits<streamsize>::max(), '\n'); for (int q_itr = 0; q_itr < q; q_itr++) { string ab_temp; getline(cin, ab_temp); vector<string> ab = split_string(ab_temp); int a = stoi(ab[0]); int b = stoi(ab[1]); int result = squares(a, b); fout << result << "\n"; } fout.close(); return 0; } vector<string> split_string(string input_string) { string::iterator new_end = unique(input_string.begin(), input_string.end(), [] (const char &x, const char &y) { return x == y and x == ' '; }); input_string.erase(new_end, input_string.end()); while (input_string[input_string.length() - 1] == ' ') { input_string.pop_back(); } vector<string> splits; char delimiter = ' '; size_t i = 0; size_t pos = input_string.find(delimiter); while (pos != string::npos) { splits.push_back(input_string.substr(i, pos - i)); i = pos + 1; pos = input_string.find(delimiter, i); } splits.push_back(input_string.substr(i, min(pos, input_string.length()) - i + 1)); return splits; }

Can we use struct instead of class for linked list in c++??

hello i need help in an assignment i have been stuck on since the morning! it is about finding the smallest missing number

Is it right decision to stop learning c and start learning c++, as I want to learn DS & algo and do competitive programming

Is it right decision to stop learning c and start learning c++, as I want to learn DS & algo and do competitive programming

Hi

Yes hi

Happy Day of the Programmer, even though I'm not sure if this place is appropriate for that as it seems that most people here can't program.

Happy Day of the Programmer, even though I'm not sure if this place is appropriate for that as it seems that most people here can't program.

Cyberbulling

You either learn C++ or competitive programming You do not have to learn C++ to do competitive programming

Almost 70% competitive programmers using c++ for competitive programming

They are using lame C++

Will python also work?

Why not?

They are using lame C++

It's better to make it as simple as possible Also bjarne advised so

I didn't mean simple I meant lame

Like raw ptrs instead of smart ones

Segregate after sorting. Then write the utility code to find the relative missing number. Probably should work.

uhm yea the prob i had to do it without sorting and only with O(n) complexity,, but i figured it out thx for the suggestion :)

hello i need help in an assignment i have been stuck on since the morning! it is about finding the smallest missing number

Bit manipulation?? It's sub type of missing number which is easily done by xor

Haven't you heard of 996ICU?

What is this?

Google it