[hello world for commander] #commander #terminal #introduction

helloworld_for_commander.js

console.log("hello, world!");

var program = require("commander");
program
    .version('0.0.1')  
    .usage('[options] [value ...]')
    .option("-s, --string <string>", "a string argument");
program.parse(process.argv);
console.log(program.string);