Re: scheme set list function

[Aaron Hill]

On 2019-04-06 9:50 am, Thomas Morley wrote:
> Though, I'd think you should rethink whatever you plan, I'm very
> skeptic about always resetting a toplevel defined list.
> It's too destructive.

Also, it is convention to use an exclamation point as a suffix when 
naming procedures that may modify the structure of arguments to produce 
their results.  This makes it easier for users to know where side 
effects might exist.

Consider this:

%%%%
#(define (1+last! lst) (list-set! lst (- (length lst) 1) (1+ (last 
lst))))

#(define foo '(1 2 3))
#(1+last! foo)
#(format #t "\nfoo = ~a" foo)
#(1+last! foo)
#(format #t "\nfoo = ~a" foo)
%%%%


-- Aaron Hill