小编Ric*_*rdo的帖子

在Qt/C++中有QT_DEBUG定义宏来知道它何时在调试或发布时编译.

是否有任何方法可以知道应用程序是否在QML文件中以调试或释放模式运行？

我正在尝试创建一个 DTO 文件来转换值并保存文档。

export class CreateProductDto {
  readonly pricing: {
    readonly list: number;
  } 
}

async create(@Body() createProductDto: CreateProductDto) {
  console.log(createProductDto);
  console.log(createProductDto.pricing.list); 
}

import * as mongoose from 'mongoose';

export const ProductSchema = new mongoose.Schema({
  pricing: {
    list: {
      type: Number,
    },
  },
});

但 pricing.list 的值是undefined。

在 NestJS 中执行此操作的正确方法是什么？

I am trying to extract MAC address from arp table without but it is returning a empty line.

I tried to use the command:

arp -a | grep eth1 | grep '^\A(([0-9a-fA-F]{2}):){5}([0-9a-fA-F]{2})$\z'

The 'arp -a' command return:

? (192.168.36.20) at 80:e0:1d:43:b0:60 [ether] on eth1
? (192.168.0.1) at 34:4b:50:b7:ef:08 [ether] on usb0
? (172.17.140.200) at 10:c3:7b:c4:82:04 [ether] on eth0

Thanks

如何使用QtQuick 2绘制矩形并控制它是显示左边界还是右边界？

我能找到的唯一错误就是看 dmesg

[  603.598951] init: thx4-web-1 main process ended, respawning
[  603.607935] init: thx4-web-1 main process (3901) terminated with status 127
[  603.607988] init: thx4-web-1 main process ended, respawning
[  603.616866] init: thx4-web-1 main process (3903) terminated with status 127
[  603.616917] init: thx4-web-1 respawning too fast, stopped

操作系统:Debian 7,chruby(2.1.2),新贵(1.6.1-1)和领班(0.74.0)

只有一个进程,以简化Procfile.staging中的调试过程:

web: RAILS_ENV=staging bundle exec puma -e staging -C config/puma.rb

工头生成的文件:

# /etc/init/thx4.conf
start on runlevel [2345]
stop on runlevel [!2345]

# /etc/init/thx4-web.conf
start on starting thx4
stop on stopping …

我试图使用新的信号和插槽语法,但我在连接函数时遇到编译错误.在这种情况下如何使用新语法？

// Qt 5.4.1, Apple LLVM version 6.1.0 and qmake 3.0
private slots:
    void onError(QSerialPort::SerialPortError code);

private:
    QSerialPort *m_port;

Link::Link(QObject *parent) : QObject(parent) {
  m_port = new QSerialPort(parent);

  connect(m_port, &QSerialPort::error, this, &Link::onError);
}

完整的错误消息:

error: no matching member function for call to 'connect'
 connect(m_port, &QSerialPort::error, this, &Link::onError);
  ^~~~~~~

candidate function not viable: no overload of 'error' matching 'const char *' for 2nd argument
static QMetaObject::Connection connect(const QObject *sender, const char *signal,
                               ^

有没有更好的方法来编写下面相同的代码？我正在寻找一个干净,最小的代码.

val.gsub!('A', 'Q')
val.gsub!('B', 'W')
val.gsub!('C', 'E')
val.gsub!('D', 'R')
val.gsub!('E', 'T')
val.gsub!('F', 'Y')