lixingcong

class MyIPValidator : public QRegularExpressionValidator
{
	// https://www.qtcentre.org/threads/6228-Ip-Address-Validation
public:
	MyIPValidator(const QString& defaultString, QObject* parent = Q_NULLPTR)
		: QRegularExpressionValidator(
		QRegularExpression("^0*(2(5[0-5]|[0-4]\\d)|1?\\d{1,2})(\\.0*(2(5[0-5]|[0-4]\\d)|1?\\d{1,2})){3}$"), parent)
		, m_defaultString(defaultString)
	{}

lixingcong

The following table provides the details of standard integer types with their storage sizes and value ranges

Type	Storage size	Value range
char	1 byte	-128 to 127 or 0 to 255
unsigned char	1 byte	0 to 255
signed char	1 byte	-128 to 127
int	2 bytes or 4 bytes	-32768 to 32767 or -2147483648 to 2147483647
unsigned int	2 bytes or 4 bytes	0 to 65535 or 0 to 4294967295
short	2 bytes	-32768 to 32767

lixingcong

#include <QDataStream>
#include <QString>
#include <QDebug>

struct Data1
{
	bool    isOk;
	int     value;
	QString str;
};

lixingcong

#include <iostream>
#include <memory>
#include <utility>

// 源码已稍作修改，出自：https://en.cppreference.com/w/cpp/utility/forward
struct A
{
	A(int&& n) { std::cout << "rvalue overload, n=" << n << "\n"; }
	A(int& n) { std::cout << "lvalue overload, n=" << n << "\n"; }
};

lixingcong

#ifndef MYRANDOM_HPP
#define MYRANDOM_HPP

// 源码：https://evileg.com/en/post/306

#include <random>

namespace details
{
/// True if type T is applicable by a std::uniform_int_distribution

lixingcong

#include <QObject>
#include <QDebug>

class MyClass : public QObject
{
    Q_OBJECT
public:
    explicit MyClass(QObject *parent = nullptr):QObject(parent){}

    Q_INVOKABLE void printHello(const QString& text)

lixingcong

#include "Label.h"
#include "Label_p.h"

Label::Label(const QString& text, QWidget *parent) : QLabel(text, parent),
	d_ptr(new LabelPrivate(this))
{
}

QString Label::myGetText()
{

lixingcong

#!/bin/bash

# Update: 2021-03-17

# Modified by lixingcong
# Fork from https://github.com/necan/shadowsocks-libev-static-build
# Attention: modified from https://github.com/shadowsocks/shadowsocks-libev/blob/master/docker/mingw/build.sh

# The script does not need to run as root

lixingcong

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\Directory\background\shell\git_shell]
@="Git Ba&sh Here"
"Icon"="D:\\Program_Files\\Git\\git-bash.exe"

[HKEY_CLASSES_ROOT\Directory\background\shell\git_shell\command]
@="\"D:\\Program_Files\\Git\\git-bash.exe\" \"--cd=%v.\""

[HKEY_CLASSES_ROOT\Directory\shell\git_shell]

lixingcong

# source from phuslu
# https://phus.lu/sysctl.conf

# bbr
net.core.default_qdisc=fq
net.ipv4.tcp_congestion_control=bbr

net.ipv4.tcp_retries2 = 8

# 系统所有进程一共可以打开的文件数量， 每个套接字也占用一个文件描述字