Re: Easy way to rename files sequentially?

[reader]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: reader@newsguy.com
>> Date: Sun, 25 Nov 2007 15:46:38 -0600
>> 
>> Eli Zaretskii <eliz@gnu.org> writes:
>> 
>> > Try the "% R" command in Dired.  It computes the new name by
>> > regular-expression substitution from the old name.
>> 
>> Eli, probably obvious to you but how does that method allow sequential
>> numbering?
>
> I must admit don't really understand what did you mean by ``sequential
> numbering''.  How about an example?

I took the meaning from the OP:

   "I sometimes have a list of files which I would like to rename both
    in a group and in sequence."

So something like:

img-0987.jpg
img-9027.jpg
img-1237.jpg
img-0007.jpg

Might become:

000-img-0987.jpg
001-img-9027.jpg
002-img-1237.jpg
003-img-0007.jpg

Or if keeping the original for reference is not needed then possibly:

img-000.jpg
img-001.jpg
img-002.jpg
img-003.jpg