wention

#include <iostream>


#if __cplusplus < 201700L
// c++11
template<typename... Args>
constexpr int f(Args&&... args) {
    int sum = 0;
    int arr[] = {(sum+=args, 0)...};
    return sum;

wention

# 指定 dnsmasq 监听的接口
#interface=ens160
listen-address=10.1.1.22

# 禁用 DNS 功能
port=0

dhcp-range=10.1.1.0,static,255.255.255.0,1h

# 主机白名单

wention

#include <iostream>
#include <QDebug>
#include <QRectF>

template<typename T, typename = void>
struct has_qdebug_stream_operator : std::false_type {};

template<typename T>
struct has_qdebug_stream_operator<T, std::void_t<decltype(std::declval<QDebug>() << std::declval<T>())>> : std::true_type {};

wention

# https://aka.ms/vs/17/release/vs_community.exe
.\vs_Community.exe --layout d:\localVSlayout --add Microsoft.VisualStudio.Workload.NativeDesktop --add Microsoft.VisualStudio.Workload.ManagedDesktop --add Microsoft.VisualStudio.Component.VC.140 --add Microsoft.VisualStudio.Component.VC.v141.x86.x64 --add Microsoft.VisualStudio.ComponentGroup.VC.Tools.142.x86.x64 --add Microsoft.VisualStudio.Component.Windows10SDK.19041 --includeRecommended --lang en-US

# install 
.\vs_Community.exe --noWeb --add Microsoft.VisualStudio.Workload.NativeDesktop --add Microsoft.VisualStudio.Workload.ManagedDesktop --add Microsoft.VisualStudio.Component.VC.140 --add Microsoft.VisualStudio.Component.VC.v141.x86.x64 --add Microsoft.VisualStudio.ComponentGroup.VC.Tools.142.x86.x64 --add Microsoft.VisualStudio.Component.Windows10SDK.19041 --includeRecommended --addProductLang en-US

wention

    def draw_rounded_rect(self, painter, rect, x_radius=10, y_radius=10, corners=(1, 1, 1, 1), mode = Qt.AbsoluteSize):
        path = QPainterPath()

        if mode == Qt.RelativeSize:
            x_radius = x_radius / 100 * (rect.width()/2)
            y_radius = y_radius / 100 * (rect.height()/2)

        x_radius = max(0, min(x_radius, rect.width()/2))
        y_radius = max(0, min(y_radius, rect.height()/2))

wention

import sys
import socket
import struct

def multicast_receive(multicast_group, port):
    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

    sock.bind(('', port))

    group = socket.inet_aton(multicast_group)

wention

import socket

def get_myip():
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    s.settimeout(0)

    myip = None
    try:
        # doesn't even have to be reachable
        s.connect(('10.254.254.254', 1))

wention

user  nginx;
worker_processes  1;

error_log  /var/log/nginx/error.log notice;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}

wention

ssh-keygen && cat $env:userprofile/.ssh/id_rsa.pub | ssh user@linuxserver 'cat >> .ssh/authorized_keys'

wention

import sys

from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *


def rect_scale(source, target, aspect=Qt.IgnoreAspectRatio):
    """缩放
        source 待缩放