Re: LOGO-L> slowdraw

[Jacques Duthen <inpact10@clr48pl.der.edf.fr>]

George Mills wrote:
[snip]
> But I thought my solution was more fun (more in the spirit of
> logo/lisp) and eliminates the need for any "globals". My rule of
> thumb is not to avoid MAKE but avoid GLOBALs when possible.

Some people (not me) use closures in lisp, like:

(let ((the-speed 0))
  (defun set-speed (speed)
    (setq the-speed speed))
  (defun fd (l)
     ...
     (wait the-speed)))

where the variable the-speed is NOT global: it cannot be 
accessed except by the two functions defined in its lexical scope.
And you don't have to redefine the function fd each time you
change the speed.

Are there any closures in LOGO?

-- 
| # # | # # # | # # | # # # | # # | # # # | Jacques Duthen          |
| # # | # # # | # # | # # # | # # | # # # | duthen@club-internet.fr |
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