Types of Arrays • Fixed Size Arrays ■ Stack Allocation ■ Heap Allocation • Dynamic Size Arrays ■ Vector in C++ ■ ArrayList in Java ■ List in Python

Types of Arrays • Fixed Size Arrays ■ Stack Allocation ■ Heap Allocation • Dynamic Size Arrays ■ Vector in C++ ■ ArrayList in Java ■ List in Python

In fixed Size array how we get to know it Is stack or heap Allocation

char arr[10]; // stack char* arr = new char[10]; // heap

char arr[10]; // stack char* arr = new char[10]; // heap

char *arr isn't correct ?

anyone help me for vs code setting

setting for what?

c language

windows or linux?

windows

/report

Good evening winter, I have started a C++ programming project with the LVGL library and an ILI9341 display connected by SPI to a Raspberry Pi Zero W, I can't get a first compilation successful... it gives me a lot of errors with the reference to the lvgl and lv_drivers libraries and I can't get it to compile without errors to continue with the development, I have gone around in circles, if someone can help me I can attach the project files + compilation script. I am very new to the group and I don't know if these types of ZIP files can be added. I thank you in advance for any help !!

The chance of you need to use the keyword new is very low in C++, given there are so many STL container types. You can assume all are stored on the stack except for STL objects.

anyone help me for vs code setting

Good evening winter, I have started a C++ programming project with the LVGL library and an ILI9341 display connected by SPI to a Raspberry Pi Zero W, I can't get a first compilation successful... it gives me a lot of errors with the reference to the lvgl and lv_drivers libraries and I can't get it to compile without errors to continue with the development, I have gone around in circles, if someone can help me I can attach the project files + compilation script. I am very new to the group and I don't know if these types of ZIP files can be added. I thank you in advance for any help !!

ESP-IDF or Arduino IDE?

I'm working with Raspberry Pi OS without desktop, connected with ssh and editing remotely with ZED editor.

What are the specific compilation error messages?

Can anybody help me online working on backend of my website

Hello, if you experienced TensorFlow framework for C++ (not through python), can you tell me how it works, is it better than python version and why? what are the differences? and what are the requirements?

Tensorflow for C++ is how Tensorflow for python works, it calls upon the C++ version. Differences are inexistant except you will get more control over things in C++

I think it uses C version of tensorflow.

You mean that they linked a C++ lib through a C lib to use it from C++? I sure hope not

The python wheel package is a tensorflow c api wrapper

hello everyone! I'm making a simple window manager (testing it on Xephyr), but when I try to run any terminal (kitty, alacritty) or firefox it opens on my display=:0 not in my Xephyr. So I tested it on my hardware using a .desktop on /usr/share/xsessions, when I try to run firefox it crashes my wm, why? I'm using Xlib

Is it guaranteed that the order of an iteration through an unordered_map will be the same if the map is not modified between iterations? I mean, if I have: for(auto [key, _]: my_map) { // some stuff with key} for(auto [_, value]: my_map) { // some stuff with value} Will the keys keep the correspondence with the values in the order?

I mean the relative order between the elements as the iterator goes

I don't think it explicitly guarantees anything about the order, but I think it is safe to assume the order will not be changed if the map is not modified.

I think it would be wiser to rewrite it in a way that takes only 1 for loop

I mean for sure, it also will create less questions from the next programmer who reads the code

Well, I argue it's more readable the way I'm thinking. I'm doing a bit level serialization of the data where I put first the values separated by a divisor token and then the keys. I think it'll be much more cumbersome to be inserting in two places with offset in a single iteration and also will be harder for anyone else to read it. Two fors are just simpler imo. I guess I'll simple use a map instead of an unordered map, there is no much data and the map might even do better.

Well, I argue it's more readable the way I'm thinking. I'm doing a bit level serialization of the data where I put first the values separated by a divisor token and then the keys. I think it'll be much more cumbersome to be inserting in two places with offset in a single iteration and also will be harder for anyone else to read it. Two fors are just simpler imo. I guess I'll simple use a map instead of an unordered map, there is no much data and the map might even do better.

std::unordered_map is typically good if you have large amount of data with many lookups. Otherwise it's better to go for std::map. As for your initial question, I assume since the container doesn't change during the iterations, they are going through the same path.

Stroustrup, in one of his books says: Use std::unordered_map if you need to do a lot of lookups in a large map and you don’t need an ordered traversal (and if you can find a good hash function for your key type). IIRC. And hashtables have much to deal with, yeah. Will try to watch that video too.

Someone can add my friend and talk to me?