Usually when a cool Python script comes along, I'm thinking if Javascript can do this too. It almost always can. Yet there are so few Javascript fans that I can't help but showing what Javascript can do to anybody that will listen.

Today Mark Pilgrim shows how to dynamically extend APIs with Python. Javascript can do this too, it's almost trivial even. At Q42 we use this a lot in Mozilla to extend the DOM with some of the more useful Internet Explorer features. (We would like to be able to do this the other way around, but IE's DOM is not implemented in a very Javascript compatible way.) Here's one example how to extend the DOM to support the selectSingleNode method. Note that after the code has executed, all XML and HTML nodes support the method.

1:35:50 PM  comment ()