Re: [Jscheme-user] question regarding dynamic function definition

[Mark M. <mg...@ch...>]

> A more appropriate way might be to use a macro:
>
> (define-macro (dynamicdefine name procedure)
>   `(set! ,(string->symbol name) ,procedure))
>
> But this requires understanding quasiquote.  This macro expands like 
> this:
>
>> (macroexpand '(dynamicdefine "bar" (lambda (x) (+ x 3))))
> (set! bar (lambda (x) (+ x 3)))

Thanks! This strategy indeed does the job.

> Why do you need such a factory?

In the application I'm working on, jscheme is used to wrap many useful 
functions in order to create what is essentially a scripting language 
on top of the existing java code... however there are some sets of data 
which are loaded (and named) at run time that I'd like to be available 
in this scripting language. One of the keys to this scripting language 
is to hide the actual scheme syntax from the users, so when someone 
loads one of these data files the factory method will be called the 
generate a new function within scheme keyed to the name of that file. 
So yeah, that's the summary of how it will be used. :-)

Thanks again!
-mark