Topic: How does the Interactive Ruby window, like TryRuby work ?

Hi All,

I'd like to build what looks like a very simple app to me, but I may be mistaken.

I'd like to wrte an interactive ruby session similar to the tryruby one, (and extend it for my own purposes).

I downloaded an example IRB Web 2.0 application from Sophrinix ? I think, but it screwed up my dev environment was way too complicated and didnt work, so I abandoned that approach.

Anyway, If some one could maybe give me a simple architectural description or just fling a few appropiate buz words at me then maybe I might be able to figure the rest out myself.

Best of all might be a simple tute to build the above.

Specifically I am a bit puzzled about how the text field used in the html form can be interactive.

Regards
railsnwbie99