RubyJS - Convert Ruby to Javascript

Ruby
1

Hi all,

Long time since I announced my last project…

With RubyJS you can transform a subset of Ruby into Javascript code.

What works?

  • Classes, modules, inheritance
  • Instance methods, class methods
  • Exceptions (rescue/ensure)
  • Meta-programming stuff like ‘attr_reader’
    (any meta-programming stuff works that does not appear inside
    methods)
  • Iterators, yield
  • “require” (with platform-specific extension ala Google Webtoolkit)
  • Inline Javascript code
  • Some kind of compile-time method lookup :wink:
  • Numbers, String, Array, Hash, Proc (a lot of functionallity is
    missing!)
  • Testing with Rhino-JS
  • A lot more :slight_smile:

There is a lots of room for optimizations and improvement :slight_smile:

Best take a look at sample/demo.rb or test/*.rb.

DOWNLOAD

It’s available from here:

http://ntecs.de/hg-projects/rubyjs/

Best use Mercurial (www.selenic.com/mercurial) to check it out:

hg clone static-http://ntecs.de/hg-projects/rubyjs/

Requires ParseTree 1.6.3 as rubygem.

Have fun with it!

Regards,

Michael

2

Michael N. [email protected] wrote:

With RubyJS you can transform a subset of Ruby into Javascript code.

yes but how to interact with the browser window, for example, say i have
a :

 in the html document and i want to redefine ruby

puts like this :


def puts(str)

document.getElementById(‘STDOUT’)[‘inneHTML’] += str + “\n”

end


if i do that into your HelloWorld class i get errors :


method_generator.rb:1040:in `method_missing’: Not implemented

(RuntimeError)

[…]


is their a way to let RubyJS knows that “document.getElementById…” is

allready JS ???



























3






Michael N. [email protected] wrote:




If you want to insert Javascript code directly into your Ruby code, use

backticks:


def puts(str)

document.getElemementById('STDOUT')['innerHTML'] += str + "\n"

end




I got the same error with that writing :

…/bin/…/lib/rubyjs/method_generator.rb:1040:in `method_missing’: Not

implemented (RuntimeError)

[…]

from …/bin/rubyjs_gen:82



























4






Am Sonntag, 14. Januar 2007 09:05 schrieb Une Bévue:




document.getElementById(‘STDOUT’)[‘inneHTML’] += str + “\n”

end


if i do that into your HelloWorld class i get errors :




Well, does it work in Ruby? NO! So it doesn’t work in RubyJS as well :slight_smile:

It’s a bit more advanced than converting “document” from Ruby plainly

into “document” in Javascript.


If you want to insert Javascript code directly into your Ruby code, use

backticks:


def puts(str)

document.getElemementById('STDOUT')['innerHTML'] += str + "\n"

end


In the next step, I’ve planned to port Google’s Webtoolkit (or Python

Pyjamas)

to RubyJS.




method_generator.rb:1040:in `method_missing’: Not implemented

(RuntimeError)

[…]


is their a way to let RubyJS knows that “document.getElementById…” is

allready JS ???




See above :slight_smile:


Regards,


Michael



























5






On Jan 14, 2007, at 4:59 AM, Michael N. wrote:




In the next step, I’ve planned to port Google’s Webtoolkit (or

Python Pyjamas)

to RubyJS.




Very cool! I’m played with Google Web Toolkit and really like it …

except for the part where you have to code in Java to use it. A Ruby

equivalent would be wonderful!



























6






Am Sonntag, 14. Januar 2007 02:22 schrieb Daniel F.:




Is there a way to download it without installing Mercurial? I looked

around the website given but didn’t see anything. I am interested in

seeing the code it produces.




Uploaded a temporary tarball here:

http://ntecs.de/hg-projects/rubyjs.tar.gz


You can also see a sample of the produced code here:

http://ntecs.de/hg-projects/rubyjs/sample/demo.js


or try the demo:



























7






Michael N. [email protected] wrote:




If you want to insert Javascript code directly into your Ruby code, use

backticks:


def puts(str)

document.getElemementById('STDOUT')['innerHTML'] += str + "\n"

end


In the next step, I’ve planned to port Google’s Webtoolkit (or Python Pyjamas)

to RubyJS.




fine thanks a lot, same syntax as using command line shell tools…


great job !



























8






Is there a way to download it without installing Mercurial? I looked

around the website given but didn’t see anything. I am interested in

seeing the code it produces.


Thanks,

Dan



























9






On Jan 13, 2007, at 5:22 PM, Daniel F. wrote:




Is there a way to download it without installing Mercurial? I

looked around the website given but didn’t see anything. I am

interested in seeing the code it produces.


Thanks,

Dan




Yeah could you please post a tarball somewhere? I don’t have

mercurial but I am interested in playing with this project.


Thanks


– Ezra Z.

– Lead Rails Evangelist

– [email protected]

– Engine Y., Serious Rails Hosting

– (866) 518-YARD (9273)



























10






Michael N. wrote:






def puts(str)

backticks:




def puts(str)

document.getElemementById('STDOUT')['innerHTML'] += str + "\n"

end




Sorry! Actually it should be:


def puts(str)

document.getElemementById('STDOUT')['innerHTML'] += #<str> + "\n"

end


Notice the #, which correctly converts variable names.


Regards,


Michael