named_parameters.coffee

callableWithNmaed = (fn) ->
  fn_s = fn.toString()

  if m = fn_s.match(/function[\w\s]*\((.*?)\)/)
    arg_names = m[1].split(/[\s,]+/)

    (args) ->
        call_args = for arg_name in arg_names
          args[arg_name]

        call_args.push args

        fn.apply(null, call_args)

fn1 = (foo, bar) ->
  foo+bar

fn2 = (bar, foo) ->
  foo+bar

opts = {foo: 'foo', bar: 'bar'}

console.log fn1.toString(), callableWithNmaed(fn1)(opts)
console.log fn2.toString(), callableWithNmaed(fn2)(opts)