What is it?
-----------
This is a small module that runs Javascript code on Google's V8 engine.
The module takes any valid Javascript string, compiles it, runs and returns the result of 
of the command as a (Python) string. When appropriate, boolean or float objects are 
also returned. Think of this as eval() in  Python. This is released under the BSD license.

Prerequisites
-------------
To build this, you will need to build v8, of course. You will also need to install Cython. I am
sure this can also run on Pyrex, but I have not formally tried it yet.

Building it
-----------
$ python setup.py build_ext --inplace
# add libv8 to your library path
$ export LD_LIBRARY_PATH=/path/to/libv8

This should build v8onpython.so and let you import the module.

Usage
-----
After building it, import it.

>>> import v8onpython
>>> v = v8onpython.Script()
>>> js_code = "for (i=0;i<1000000;i++){\n j=i+1\n}"
>>> v.compile(js_code)
1000000.0
>>> v.compile('1 < 2')
True
>>> v.compile("'Hello' + ', World!'")
'Hello, World!'
>>> v.compile("1.32w")
'SyntaxError: Unexpected token ILLEGAL'
>>> v.compile('a')
'ReferenceError: a is not defined'


Experimental Javascript console
-------------------------------

As of revision 25, there is a custom JS console/interpreter. It has 
history, colors, command search via Ctrl+R, and tab completion. 
It will get better over time: 
$ python repl.py
[v8onpython Javascript console. Press Ctrl+D to exit]
v8onpy > var x=234
v8onpy > x[TAB]
x                 x.toExponential   x.toFixed         
x.toLocaleString  x.toPrecision     x.toString
v8onpy > x.toString()
234
v8onpy > Array.[TAB]
Array.constructor           Array.isPrototypeOf         Array.propertyIsEnumerable  Array.toString
Array.hasOwnProperty        Array.length                Array.toLocaleString        Array.valueOf
v8onpy > function add(a,b){return a+b}
v8onpy > add(9,'2')
92
v8onpy >


That's all! If you have any feedback, please send me an email at dfdeshom at gmail com

What would be cool
------------------

* Code contributions

* Performance numbers of CPython vs JS on V8.

* expand this and make Python and JS talk faster using
  objects, callbacks, etc