Re: Deleting a subfield using MARC::Record

Edward Summers wrote:

> The current documentation for the new method reads like this:
> 
> -- 
> 
>        delete_subfield() allows you to remove subfields from a field:
> 
>            # delete any subfield a in the field
>            $field->delete_subfield(code => 'a');
> 
>            # delete any subfield a or u in the field
>            $field->delete_subfield(code => ['a', 'u']);
> 
>        If you want to only delete subfields at a particular position you 
> can
>        use the position parameter:
> 
>            # delete subfield u at the first position
>            $field->delete_subfield(code => 'u', position => 0);
> 
>            # delete subfield u at first or second position
>            $field->delete_subfield(code => 'u', position => [0,1]);

If you implemented negative indexes, it would be nice to add an example:

             # delete subfield u at last position
             $field->delete_subfield(code => 'u', pos => [-1]);

>        You can specify a regex to for only deleting subfields that match:
> 
>           # delete any subfield u that matches zombo.com
>           $field->delete_subfield(code => 'u', match => qr/zombo.com/);

The term "position" ("pos") seems a little ambiguous to me on the face 
of it. Does (code => 'u', pos => 0) mean "the first subfield u" (which 
is what  I take it to mean) or "subfield u if it's the first subfield" 
(which it might sound like outside the context of this discussion)?

Mike
-- 
Michael Kreyche
Systems Librarian
Associate Professor
Kent State University Libraries and Media Services
http://www.personal.kent.edu/~mkreyche
330-672-1918