Re: Closures - do you understand them well?

[Stefan Monnier]

>> (let ((funs '()))
>>   (loop for i from 1 to 3
>>      do (push (lambda () i) funs))
>>   (apply #'+ (mapcar #'funcall funs)))
>> ;=> 12
>
> I guess this depends a bit on the implementation of `loop'.

I haven't checked but for the similar code using `dolist` or `dotimes`
Common Lisp indeed leaves it unspecified ig the same `i` binding is used
through the loop or if a different binding is used at each iteration.

In ELisp, both `dotimes` and `dolist` create a new binding for `i` at
each iteration of the loop.


        Stefan