Today I started to mine BTG on my 3GB farm. The miner consumes about 1.7MB on HiveOS:
BTG did 3X in April and theoretically it can be the most profitable coin on 3GB cards.
(more…)Author Archives: dmitriano
Resizing a partition on HiveOS
There was some strange partition /dev/sda2 of 6.5G size on my HiveOS:
root@rig0:/# cat /proc/partitions
major minor #blocks name
8 0 117219767 sda
8 1 20480 sda1
8 2 7323648 sda2
root@rig0:/# df -h
Filesystem Size Used Avail Use% Mounted on
udev 1.9G 0 1.9G 0% /dev
tmpfs 383M 44M 340M 12% /run
/dev/sda2 6.8G 6.5G 0 100% /
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
tmpfs 100M 16K 100M 1% /tmp
tmpfs 1.9G 0 1.9G 0% /var/tmp
tmpfs 1.9G 30M 1.9G 2% /var/log
tmpfs 1.9G 0 1.9G 0% /var/log/journal
tmpfs 1.9G 0 1.9G 0% /var/log/apt
/dev/sda1 20M 5.7M 15M 29% /hive-config
Negating the minimal integer results in an overflow in C++
The code below compiles with a warning:
#include <iostream>
#include <limits>
#include <cstdint>
int main()
{
int64_t m1 = -std::numeric_limits<int64_t>::min();
int64_t m2 = -m1;
std::cout << m1 << std::endl << m2 << std::endl << std::numeric_limits<int64_t>::max() << std::endl;
return 0;
}
Dragging a link from a browser to a QML app
When a link is dragged from a browser on Window 10 platform it contains the page title, but they did not make it accessible in QML:
import QtQuick 2.15
import QtQuick.Controls 2.15
ApplicationWindow {
visible: true
width: 640
height: 480
title: qsTr("Scroll")
id: root
DropArea {
id: dropArea;
anchors.fill: parent
onEntered: {
root.color = "gray";
drag.accept (Qt.LinkAction);
}
Running a Tron node on Ubuntu 20.04 WSL
Installed Java SDK:
sudo apt update
sudo apt install default-jdk
javac --version
javac 11.0.9.1
Cloned the repository:
git clone https://github.com/tronprotocol/wallet-cli
And found the following in wallet-cli\src\main\resources\config.conf:
The sum of signed and unsigned is unsigned in C++
#include <iostream>
template <typename T>
void PrintValue(T val)
{
if constexpr (std::is_signed_v<T>)
{
std::cout << "signed";
}
else
{
std::cout << "unsigned";
}
std::cout << std::endl << val << std::endl;
}
Installed Post Password Token WordPress plugin
When the user enters a page or post password WordPress sets wp_postpass_XXXX cookie:
Use chrome://settings/cookies/detail?site=developernote.com to see the cookies in Google Chrome browser.
How I used OMNI USDT client on my home Windows machine
First, as a true C++ developer, I installed Ubuntu 18.04 and compiled omnicore from sources, but after that I realized that Windows omnicore-0.9.0 client can be downloaded and run directly on my Windows 10 machine.
I found omnicore-qt.exe in the unpacked files and run it:
I did not receive a peak price from Binance
In my app I display prices that I receive from Binance STORJ/BTC trade stream (green color):
