Feeling out continuable syntax in coffeescript, javascript, and lua

test.coffee

fs = require('fs')

open = (path, flags, mode) -> (callback) ->
  fs.open(path, flags, mode or 438, callback)

close = (fd) -> (callback) ->
  fs.close(fd, callback)

open("home.txt", "r") (err, fd) ->
  throw err if err
  console.log("Opened")
  close(fd) (err) ->
    throw err if err
    console.log("Closed")
  

test.js

var fs = require('fs');

function open(path, flags, mode) {
  return function (callback) {
    fs.open(path, flags, mode || 0666, callback);
  };
}

function close(fd) {
  return function (callback) {
    fs.close(fd, callback);
  };
}

open("home.txt", "r")(function(err, fd) {
  if (err) throw err;
  console.log("Opened");
  close(fd)(function(err) {
    if (err) throw err;
    console.log("Closed");
  });
});

test.lua

local fs = require "fs"

local function open(path, flags, mode)
  return function (callback)
    fs.open(path, flags, mode or "0666", callback)
  end
end

local function close(fd)
  return function (callback)
    fs.close(fd, callback)
  end
end

open("home.txt", "r")(function (err, fd)
  if err then error(err) end
  print "Opened"
  close(fd)(function (err)
    if err then error(err) end
    print "Closed"
  end)
end)

LiveScript:

fs = require 'fs'

open = (path, flags, mode, cb) ->
  fs.open path, flags, mode ? 438, cb
close = fs.close

err, fd <-! open 'home.txt', 'r', null
throw err if err
console.log 'Opened'
err <-! close fd
throw err if err
console.log 'Closed'