cli flags

Node.js

const yargs = require('yargs')
const { foo='default value', qux=false } = yargs.argv
console.log('foo:', foo)
console.log('qux:', qux)

Output

$ node examples/cli_flags.js --foo='bar' --qux=true
foo: bar
qux: true

Go

package main
import (
    "flag"
    "fmt"
)
func main() {
    var foo string
    flag.StringVar(&foo, "foo", "default value", "a string var")
    var qux bool
    flag.BoolVar(&qux, "qux", false, "a bool var")
    flag.Parse()
    fmt.Println("foo:", foo)
    fmt.Println("qux:", qux)
}

Output

$ go run examples/cli_flags.go -foo='bar' -qux=true
foo: bar
qux: true