keys.go

package main

import (
	"fmt"
	"os"
	"syscall"
)

func GetBytes() []byte {
	_in, _ := os.OpenFile("/dev/tty", syscall.O_RDONLY, 0)
	var _buf []byte

	getch := func(nonblock bool) int {
		b := make([]byte, 1)
		syscall.SetNonblock(int(_in.Fd()), nonblock)
		_, err := _in.Read(b)
		if err != nil {
			return -1
		}
		return int(b[0])
	}

	c := getch(false)
	_buf = append(_buf, byte(c))

	for {
		c = getch(true)
		if c == -1 {
			break
		}
		_buf = append(_buf, byte(c))
		fmt.Println(" -- ", _buf)
	}
	fmt.Println(" xx ", _buf)

	return _buf
}

func main() {
	GetBytes()
}

keys.rb

require 'curses'
Curses.init_screen
Curses.raw
Curses.noecho
loop do
  ord = Curses.getch
  break if ord == 3
  Curses.addstr ord.ord.to_s + ' '
end