Re: What's so cool about Scheme?

[Matt Hellige <address@hidden>]

[Guy Steele - Sun Microsystems Labs <Guy.Steele@Sun.COM>]
>    
>    What about this?
>    
>        (define get-balance #f)
>        (define deposit #f)
>    
>        (let ((balance 0))
>          (set! get-balance
>                (lambda ()
>                  balance))
>          (set! deposit
>                (lambda (amount)
>                  (set! balance (+ balance amount))
>                  balance)))
>    
> That's two closures that share some state ("balance").  Each closure
> has been stored in a global variable ("get-balance", "deposit").
> Each of the closures supports the method "apply".  One requires that
> the ordered set of argument values be empty; the other requires that
> the ordered set of argument values be a singleton set.
> 

Yes, I see what you mean now. Thanks...

Matt

-- 
Matt Hellige                  matt@immute.net
http://matt.immute.net