RE: [External] : Re: List not getting filled up

[uzibalqa]

------- Original Message -------
On Monday, July 31st, 2023 at 1:40 PM, Drew Adams <drew.adams@oracle.com> wrote:


> > Upon further introspection I found that it makes a lot of difference
> > whether I use
> > 
> > (push (copy-sequence string) result)
> > or
> > (push string result)
> > 
> > Why is that ?
> 
> Because of just what everyone's been saying:
> 
> If you add the string to the list then you
> add the same string each time, because the
> variable `string' refers to the same Lisp object (same string), as shown by` 
> eq'.

This is certainly defeating me.
 
> If you add a copy of the string the copy
> reflects the current state of the string.

string is being passed as argument to function permute, how does it not reflect
its current state ?
 
> As I wrote:
> (eq foo (copy-sequence foo)) ; -> nil
 
Could I have a real example of how they would be different ?