I want to pass a parameter to a function, do for, and if the argument is rvalue, then move objects instead of copying. How to do that? template<class T> void func(T&& v){ for (auto&& item : v) { if constexpr (std::is_rvalue_reference_v<T>) { // ALWAYS FALSE // move object auto tmp = std::move(item); } else {… Read More c++ 20: how to find that the template argument is a rvalue reference
#include <vector> #include <cstdio> using namespace std; int f() { int* a = new int(3); return *a; } int main() { //printf("%p\n", &f()); vector<int> v{3}; printf("%p\n", &(*(v.begin()))); } I cannot take address of the f(), If I comment "printf("%p\n", &f()); " out I will get error: lvalue required as unary ‘&’ operand. but how is… Read More Why I can take address of *v.begin() where v is a std::vector
For what I read and understood, this happens when I’m not sending the authentication. But I tried to send it in two ways: string userN = "username"; string _pasw = "password"; BasicHttpBinding binding = new BasicHttpBinding(); Endpoint wsdl = new Endpoint("MyEndpoint"); SoapClient client = new SoapClient(binding, wsdl); client.ClientCredentials.UserName.UserName = userN; client.ClientCredentials.UserName.Password = _pasw; await client.OpenAsync();… Read More I have this error System.ServiceModel.Security.MessageSecurityException
I have the following powershell Web-Request that works correctly for sending a command to a PTZ camera: Invoke-WebRequest -UseBasicParsing -Uri "http://192.168.111.75/ajaxcom" ` -Method "POST" ` -Headers @{ "Accept"="application/json, text/javascript, */*; q=0.01" "Accept-Encoding"="gzip, deflate" "Accept-Language"="en-US,en;q=0.9" "DNT"="1" "Origin"="http://192.168.111.75" "X-Requested-With"="XMLHttpRequest" } ` -ContentType "application/x-www-form-urlencoded; charset=UTF-8" ` -Body "szCmd=encodedStringHere" I’m trying to recreate this in C# but I can’t… Read More C# – Can't get this seemingly simple web request working
I have a shopping cart view cart list count and this document <div class="input-group input-number-group"> <div class="input-group-button" onclick="decrement_cart(this)"> <span class="input-number-decrement">-</span> </div> <input class="input-number text-center" type="number" value="{{ $detail[‘product_quantity’] }}" min="0" max="1000"> <div class="input-group-button" onclick="increment_cart(this)"> <span class="input-number-increment">+</span> </div> </div> and I want to change the middle input value by clicking on increment/decrement div. note: I can not… Read More javascript or jquery find nextSibling
Trying to understand std::move, I found this answer to another question. Say I have this function Object&& move(Object&& arg) { return static_cast<Object&&>(arg); } What I think I understand: arg is an lvalue (value category). arg is of type "rvalue ref to Object". static_cast converts types. arg and the return type both being of type "rvalue… Read More Why is static_cast<Object&&> necessary in this function?
I’m currently learning how to create progress bars but Ive run into a problem. Im not sure how I can reference the running timer in my CraftCopperBar script for my update. Or if i have the wrong idea please correct me. public IEnumerator CraftCopperBar() { while (copper >= copperBarValue) { button.SetActive(false); copper -= copperBarValue; yield… Read More How can I get this timer for my progress bar?
I have a table that fills its rows and <td> tags on its own. It does this fine as shown below: The table is generated by mapping through an array. {objInnerValues[shopIndex].map((thing, outerIndex) => ( // Ternary operator to stop creating rows from element 0 (outerIndex === 0) ? console.log("outerIndex WAS 0") : (outerIndex %2 ===… Read More Why is my JSX rendering a <tr> when it shouldn't?
Continuing on from a previous SO thread involving the conversions from a class component to a functional component, I am now having issues with both the reset and clear button operations and unsure how to fix. When clicking on both these buttons, I am getting the error: TypeError Cannot read properties of undefined (reading ‘settings’)… Read More TypeError issue when converting a class component to a functional component
I keep getting a compiler error when using the std::barrier arrive and wait functions separately. I’ve been trying to find examples of using these functions but I can’t find them so I’m just shooting wild at this point. It complaines that my arrival token is not an rvalue, so I changed the declaration to use… Read More How to use C++ std::barrier arrival_token?