Some WordPress plugins stopped working with PHP 7.0 on my Ubuntu 16.04 server and I switched to PHP 7.4 with the following commands:
sudo add-apt-repository ppa:jczaplicki/xenial-php74-temp
sudo apt-get update
sudo apt-get install php7.4 php7.4-fpm php7.4-cli php7.4-mysql php7.4-dom php7.4-mbstring -y
service php7.4-fpm status
cd /etc/php/7.4/fpm/pool.d
sudo mv www.conf www.conf.dist
sudo mv ../../../7.0/fpm/pool.d/devnote.conf .
sudo service php7.0-fpm reload
sudo service php7.4-fpm reload
An example of extending the lifetime of a temporary:
#include <iostream>
int main()
{
int a = 1;
int&& b = std::move(a);
int&& c = b + 1;
b = b + 1;
c = c + 1;
std::cout << a << b << c;
}
The output is:
223
I did not expect that its share of CPU usage in my app is 12.15%:
Why does it iterate over some collection? Isn’t there only one sender in a thread?
(more…)After various experimentation I was able to build QT 6.3.1 with OpenSSL for Windows with the following steps:
Extract archives with Bash:
tar -xzf ../distrib/openssl-1.1.1q.tar.gz
tar -xf ../distrib/qt-everywhere-src-6.3.1.tar.xz
Run the following commands with x64 Native Tools Command Prompt for VS 2022:
set PATH=%PATH%;C:\dev\PFiles\Strawberry\perl\bin
set PATH=%PATH%;C:\dev\PFiles\nasm-2.15.05
perl Configure VC-WIN64A
Run the following commands with x64 Native Tools Command Prompt for VS 2022:
set PATH=%PATH%;C:\dev\PFiles\Strawberry\perl\bin
set PATH=%PATH%;C:\dev\PFiles\nasm-2.15.05
set MY_INSTALL_DIR=C:/dev/libs/OpenSSL
perl Configure VC-WIN64A --prefix="%MY_INSTALL_DIR%" --openssldir="%MY_INSTALL_DIR%"
The key to the success in mining NEOXA on HiveOS is knowing pool parameters that can be stratum+tcp://minenice.newpool.pw:1120, for example:
To subscribe I query listen key:
POST /api/v3/userDataStream
connect to websocket wss://stream.binance.com:9443/stream and send the listen key with the following message :
{
"id": 1,
"method": "SUBSCRIBE",
"params": [
"<my listen key>"
]
}
When Binance accepts the subscription it sends:
{
"id": 1,
"result": null
}
In C++20 it is possible to do this:
std::future<int> compute(as_coroutine) {
int a = co_await std::async([] { return 6; });
int b = co_await std::async([] { return 7; });
co_return a * b;
}
std::future<void> fail(as_coroutine) {
throw std::runtime_error("bleah");
co_return;
}
int main() {
std::cout << compute({}).get() << '\n';
try {
fail({}).get();
} catch (const std::runtime_error &e) {
std::cout << "error: " << e.what() << '\n';
}
}
The code below switches to a different thread when the execution of Main() is resumed at line 11:
internal class Program
{
static async Task Main(string[] args)
{
try
{
HttpClient client = new HttpClient();
Console.WriteLine($"Thread: {Thread.CurrentThread.ManagedThreadId}");
HttpResponseMessage response = await client.GetAsync("https://developernote.com/");
Console.WriteLine($"Thread: {Thread.CurrentThread.ManagedThreadId}");
response.EnsureSuccessStatusCode();
string responseBody = await response.Content.ReadAsStringAsync();
Console.WriteLine($"Thread: {Thread.CurrentThread.ManagedThreadId}");
Console.WriteLine(responseBody);
}
catch (HttpRequestException e)
{
Console.WriteLine("\nException Caught!");
Console.WriteLine($"Thread: {Thread.CurrentThread.ManagedThreadId}");
Console.WriteLine($"Message: {e.Message}");
}
}
}
