Re: [Chicken-users] basic Scheme question

[Elf]

On Thu, 23 Oct 2008, Shawn Rutledge wrote:

> #;10> (begin (define update #f) (let ([v 'foo]) (set! update (lambda
> (d s) (printf "~s was ~s~%" d (eval d)) (set! d s)))))
> #;11> (update 'v 'bar)
> Error: unbound variable: v
>
> What I'm trying to do is pass the name of a let-bound variable in to a
> lambda defined within the let context, in order to tell that lambda to
> access that let-bound variable.  eval doesn't work because it looks in
> the outer environment, right?  (in which v is not bound)

unless there's some way to add new bindings to an arbitrary env (ie, extend
a let at runtime), then youd be better served by either explicit setting
procs for each let-bound var, or by having some form of dispatch from a 
single name.

-elf