Tagged: Japanese Samurai

GOTU / Japan / Japanese / Japanese Samurai / Samurai / The Empire Of The Rising Sun / The Rising Sun / Uncategorized

09/15/2024

The Battery Age

In a time long past, I was an automaton, an artificially intelligent robot tasked with the categorization of the many batteries that call my planet home. I wasn’t built on this planet, and I don’t know anything about where I actually came from, just enough to know to categorize the various sizes and shapes, usually long, of batteries that this...

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How to Expose C++ Qt WebView and Window Functions to Python Without Using PySide or PyQt?
11/21/2024 by red X
I'm working on a project where I need to integrate a Qt6 WebView into Python. The WebView should allow dynamic control from Python, including: Setting the window size and style (e.g., resizing, full-screen, borderless). Loading HTML content or a URL dynamically. Interacting with JavaScript in the WebView. What I Want […]
Inteligent use of std::vector reserve
11/21/2024 by André Caldas
I do have a very traditional problem. I am generating data to be pushed back to the end of an existing std::vector. My first approach was to use std::vector::reserve(). But it would not be correct. From cppreference.com: Correctly using reserve() can prevent unnecessary reallocations, but inappropriate uses of reserve() (for […]
How to efficiently set a property to 0 for an entire array in c++
11/21/2024 by Emerick Gibson
I have a structure "Struct" with a field "foo" and a very large static "Struct" array. What is the most efficient way of setting the field "foo" to 0 for the entire array? Note that I don't care about the state of the other fields after this operation. If they […]
Octave build doesn't link LAPACK properly
11/21/2024 by Ste3191
I am trying to install Octave 9.2.0 in a specific directory since I'm not root, including BLAS, LAPACK and FFT3W. I work on RedHat 7. The BLAS and LAPACK libraries are available under openblas which I have.(It's a system library and is found by ./configure command). I've manually installed the […]
std::async: does "as if in a new thread" guarantee that it is safe to use mutexes?
11/21/2024 by Peter - Reinstate Monica
The 2020 standard says (23.9.9/4.1): If launch::async is set in policy, calls invoke(decay-copy(std::forward(f)), decaycopy( std::forward(args))...) (20.14.4, 32.4.3.3) as if in a new thread of execution [...]. Does "as if" in a new thread guarantee that I can use std::mutex to protect resources accessed by multiple parallel thingies started with async? […]
Visual Studio code C++ autocomplete does not work for variables created with auto declarator
11/21/2024 by Mike mik
I am working on Visual Studio Code in a codebase with custom classes and when variables are declared using auto, my autocomplete will not work. Here is an example for a function returning a smart pointer to a custom class. When using auto, I get "No suggestions" If I manually […]
Windows C++ application does not get activated after clicking a notification in a Citrix environment
11/21/2024 by Sergio
we have followed the instructions for displaying and handling notifications in our C++ application for Windows as described here: https://learn.microsoft.com/en-us/windows/apps/design/shell/tiles-and-notifications/send-local-toast-desktop-cpp-wrl Everything works as expected in PCs with Windows 10 and Windows 11. Notification is displayed, can be clicked and Activate callback is called inside our application. But this last point […]
Calling Java from C++ with JNI using Android Studio ld: error: undefined symbol: JNI_CreateJavaVM
11/21/2024 by User123
I use the libsdl example for android to create a c++ and java based app. I'm trying to call a Java method from C++ to pass a username as a POST request to a PHP script.I'm basing this on information I found at https://www.codeproject.com/Articles/993067/Calling-Java-from-Cplusplus-with-JNI I'm using Android Studio and so […]
What differs std::to_string() from static_cast<std::string>()? [duplicate]
11/21/2024 by coolcoder2089
While on LearnCpp.com, I stumbled across a function called std::to_string(), but the tutorial didn't really elaborate on what it exactly did different than static_cast(), so now I'm confused. Also, std::string is a type, right? I attempted to use them and got a compiler error: 'static_cast': cannot convert from 'char' to […]
two same insert order‘s unordered_map，if the Iterate order are the same? [closed]
11/21/2024 by user14542318
logic like that: #include #include #include using namespace std; void insert_map(std::unordered_map& map, int num) { for(int i = 0; i < num; i++) { map.emplace(i % 13 * i, i); } } int main() { for(int k = 0; k < 10000; ++k) { std::unordered_map x1, x2; std::thread t1(insert_map, std::ref(x1), […]

Tagged: Japanese Samurai

The Battery Age

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