I am very curious about why some parameters on the command line are preceded by a "- ", some parameters have two "- ", and some do not. I want to know what this means? Is it an established norm? for example git init git-- version ls-a wait. ...
problem description I want to compile and install vcpkg, when entering commands headed by vcpkg, they all report an error: .vcpkg is not an internal or external command, nor is it a runnable program. I am not familiar with the use of orders. I hop...
http: echarts.baidu.com exam. this link is the official example. this is how I use it in vue: js excuse me, everyone, where is markpoint? The label is missing. It s amazing ~ ...
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when Qt5 combobox adds item, the list appears to be added twice void MainWindow::initSerialPort() { foreach(const QSerialPortInfo &info, QSerialPortInfo::availablePorts()) { qDebug()<<"Name"<<info.portName(); qDebu...
el-select is selected and displayed in the input box, but there are several kinds of options, including "on off ", so opening and closing cannot be selected at the same time. ...
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