Btw it's inefficient because we're calling copy constructor? And what can be the efficient way then

You could just store the next value to be returned as a state within your object and return it for subsequent peek calls. Update this state when next is called.

Hello. In std::regex_replace "$&" is a copy of the entire match, what if I need a little change finded word, for example: I need replace _hello_ with *ello*

write the code that takes a vector of numbers as input. It separates the input vector elements into three sets: even number, odd numbers and prime numbers. It returns the three output arrays as [prime even odd]. The program should perform the following functionality: (ii) Sort the array into prime, even and odd sets. (iii) Return the prime, even and odd sets. (iv) The function must test that there are sufficient input arguments. (v) The function must print an error message if there are less than required input arguments. (vi) The program must print the following: The prime set is: The even set is: The odd set is

C program

are capture groups not enough?

Bye c rust is now my new best friend

The calling code could be like vec<int> tmp; PeekingIterator it(tmp); tmp.push_back(.......);

Yes but if elements are added to the vector after calling your constructor, these pointers may become invalid

Why is that?

i have a issue, vec<int> tmp; PeekingIterator it(tmp); // now here you'll first make all calls to hasnext, next, peek and after all calls are done you'll change tmp right? because in the question it is //said don't create a new nums integer. just use the existing one. (and even in the iterator class the next and hasnext function will be written //thinking that the nums vector won't change) // all the modifications to tmp vector or nums will be made here, when all calls are done all this is like this following code where we're changing the vector but after the operations are performed using iterator, which should run fine without any ub #include<iostream> #include<vector> using namespace std; int main() { vector<int> v; v.push_back(0); v.push_back(1); v.push_back(2); v.push_back(3); int *it=&v[0]; int t=4; while(t--) { cout<<*it<<endl; it++; } v.push_back(4); v.push_back(5); }

Probably Microsoft Visual C++ Compiler

Oh I forgot another point, 100% support of C++20

I find hard setting it up, regardless how many times I try. I am not able to do the set up. :/

I find hard setting it up, regardless how many times I try. I am not able to do the set up. :/

I don't consider this as a significant advantage since it's not production ready anyway

Is the VS Installer so hard to use?

The dozens of menus of options are

imagine using vs for professional work

Is the VS Installer so hard to use?

I don't have a computer background I find it hard using it as a compiler, I don't find any issues using it as an Arduino ide or for GitHub.

Don't worry, half of the AAA game dev companies fuck that up too

You should not use it as Arduino IDE

imagine using vs for professional work

Ohh why not?

To install the compiler you need to press 4 buttons and check one checkbox

And should not use it as a compiler for Arduino

Arduino lacks several libs, while you can access them using an extension named platform io in vs code

I mean to use it

Google what CLion is

Look at companies forgetting to build their software with fallback for AVX instructions for example

Arduino lacks several libs, while you can access them using an extension named platform io in vs code

VS != VS Code

Look at companies forgetting to build their software with fallback for AVX instructions for example

VS != VS Code

so far the tutorial I saw had both vs and vs code for compiling c++? you can compile and run code without vscode?

VS Code is a text editor. Can a text editor compile any code? No

no, i am confused completely now

yes those extensions, doesn't that work the same for C++ compiler a gnu addon probably?

Compilers compile code(ie, convert piece of text into executable exe or binary).eg: MSVC, Clang, gcc, tcc, etc... You write code using special envs like IDE or using Text Editors like VSCode or even notepads. Why VSCode? IDE's(Visual Studio, Clion, Eclipse, Geany, etc...) work with only specific languages. But with a text editor like VSCode, with extensions, you can write for multiple languages. Also, vim, neovim, Sublime text, notepad++ exist Why clang or MSVC won't compile your Arduino code? It's because iirc, Arduino uses its own style of C++

afaik (i don't use them) they just execute the compiler

ah right if i wish to use vs for compiling C++ what should I be doing

Since you want to code for Arduino, install their extension and press ctrl + shift + p. It will provide options to create a new Arduino project and compile and execute code for your Arduino module.

okay probably i should use someother IDE?

whatever you want, it is up to your preference

i want to use it for C++

Which is your favorite compiler? MSVC(Windows only) or clang(Cross platform and my fav since I use linux) or gcc?

i used windows

man, consider I have zero experience with these ide's so far what I used are just online compilers dumb me

anything if that works

You need to install C++ tools using Visual Studio installer.

clion is solid option

if you don't want to explore various programs, just use notepad

yes but the issue is i can't set it up actually

Please do not do int* it. Use auto it = std::begin(v);

i do want to explore, but i haven't used any program yet

options are really unlimited, to list a few: visual studio, atom, visual studio code, vim, emacs, micro, notepad, notepad++, codeblocks, codelite, kdevelop, kate, geany, clion, nano...

If you installed it, search for C/C++ extensions and install it

but i can't actually run and compile

Let's use MSVC first. ctrl + shift + p and search for something that states cl.exe build active file

if you don't want to bother setting up your environment... just use some integrated development environment