命令行参数问题-跳过可选功能参数？

Question

I am in the middle of learning command line arguments. What I want to do is print out my script that says "Hello, World" and on the CLI, if you type down

node helloworld (name)

it will print out Hello, (name) instead. And if no name input, it will output Hello, World by default.

I basically did that but I was wondering, is there any way I can just type

node helloworld (yourname) 

INSTEAD of going through the hassle of typing

node helloworld name (yourname)

 function getArgument(argument){ var index = process.argv.indexOf(argument); return (index === -1) ? null : process.argv[index+1]; } var name = getArgument('name'); var message = name ? "Hello, " + name : "Hello, world."; console.log(JSON.stringify(message)); 

Image link on the bottom to show you what I'm talking about. Just want to type helloworld (actualname) instead of helloworld name (actualname):

Answer 1

Sure, just always take the first argument:

 let name = process.argv[2];

In your case argv looks like this:

 ["node", "helloworld", "(name)"]

therefore you can just access the third one to get the name.