MUST ... RESIST ... URGE ... FOR ... ONEUPMANSHIP!!!
AAAH!!! ;)
...
while (my $record = $batch->next) {
# find 'em
my @m856 = $record->field('856');
# get rid of 'em
$record->delete_field( $_ ) for @m856;
# map to a hash for direct uniqueness
%u856 = (map { ($_->as_usmarc => $_) } @m856);
# then add 'em back
$record->insert_fields_ordered( values( %u56) );
}
# sorry for the top-posting... and it's untested :)
__END__
--miker
On 7/30/07, Bryan Baldus <[EMAIL PROTECTED]> wrote:
> Note: my comments are untested and may not work without modification. Some
> parts left to the reader to complete.
>
> On Monday, July 30, 2007 2:16 PM, Michael Bowden wrote:
> > @m856 = sort {$a cmp $b} @m856;
>
> @m856 has MARC::Field objects. Comparing them as such are unlikely to
> produce desired results.
> better might be @m856 = sort {$a->as_usmarc() cmp $b->as_usmarc()} @m856,
> but then you lose the field object. Better might be to leave out that step
> and go on to:
>
> > my %seen = ();
> > my @new856 = ();
>
> Instead of going through all fields in the record, you could go through the
> 856s you have gathered, add them to the %seen hash as usmarc (to facilitate
> comparisons), and, as subsequent ones are already seen, delete the field.
> After that, you could sort the fields, delete them, and then add back the
> sorted fields.
>
> if (@m856) {
> foreach $f (@m856) {
>#add this field to seen fields if not seen
>unless ($seen{$f->as_usmarc}){
> $seen{$f->as_usmarc} = $f;
>}#unless seen this field's exact data
>else {
> #seen it, so delete current
> $record->delete_field($f);
>} #else seen this field
> } #foreach 856
>
> my @new856 = (); #add values of %seen, sorted according to keys of %seen
> ###sort remaining/deduplicated 856 fields, delete existing fields, and then
> add sorted fields back.
> ###where @new856 contains the values of %seen, sorted according to the keys
> of %seen
>
>$record->insert_fields_ordered( @new856 );
>
> #
>
> I hope this helps,
>
> Bryan Baldus
> [EMAIL PROTECTED]
> [EMAIL PROTECTED]
> http://home.inwave.com/eija
>
>
>
