From: itsme213 <itsme213@...>
Date: 2005-01-21T15:30:59+09:00
Subject: Re: Ta-da list (Was: Re: OSCON Call For Proposals Now Open)


"Douglas Livingstone" <rampant@gmail.com> wrote in message

> If you want to have a "normal" text interface, and a JS "rich"
> one, it means you have to code everything twice. You need to have JS
> which can manipulate HTML on the client side, plus Ruby on the server
> side to generate exactly the same HTML!

Or, someone smart could use Ryan's parse tree to write a translator from
some subset of Ruby to Javascript. Write in Ruby, debug in Ruby or generate
Javascript to debug rich-browser behaviors. Deploy to run on client with
generated Javascript, or on server with Ruby.
  def conditional1(arg1)
    if arg1 == 0 then
      return 1
    end
    return 0
  end


becomes in parse-tree:


  [:defn,
    :conditional1,
    [:scope,
     [:block,
      [:args, :arg1],
      [:if,
       [:call, [:lvar, :arg1], :==, [:array, [:lit, 0]]],
       [:return, [:lit, 1]],
       nil],
      [:return, [:lit, 0]]]]]

becomes in Javascript roughly:
    function conditional1 (arg1) {
        if (arg1 == 0) then { return 1; }
        else { return(0); }
    }

Feasible? Who knows ... Florian wrote an awesome library that shows that
Javascript with prototypes and closures can do quite a few things that
Ruby's objects and procs can do, putting a very useful chunk of core Ruby
libraries into Javascript to wit.

A Quiz candidate?