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...
now there are generally only two ways to add Wechat: scan the QR code and find Wechat s account But there are individual wap sites through an icon on the page, click on this icon link can directly jump to the designated Wechat s concern page, very con...
the entire Internet is made up of countless subnets, and when you enter an address from a browser and go back to access resources on another computer, the first step is DNS parsing to get the ip address of another computer. at this point, the first th...
function Animal() { this.name = "Animal"; this.Say = function () { console.log(this); console.log(this.name); } } function Cat() { this.name = "Cat"; } var a...
to solve The component appears to have a render method, but doesn t extend React.Component. dva issues 1717 add to index.js https: github.com umijs umi ., not knowing how to update using npm install babel@7.0.0-beta.48 or 53 prompts that th...
there is a piece of php code that simulates the hook mechanism class Ball{ public $people; public function down(){ echo "ball is downing "; $this->people=new Hook();...