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(-)a/cataloguing/value_builder/validate_isbn.pl (-2 / +1 lines)
Lines 66-72 my $launcher = sub { Link Here
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            flagsrequired => { editcatalogue => '*' },
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            flagsrequired => { editcatalogue => '*' },
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        }
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        }
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    );
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    );
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    my $is_valid = valid_isbn_checksum($isbn);
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    my $is_valid = $isbn eq q{} ? 1 : valid_isbn_checksum($isbn);
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    $template->param( return => $is_valid );
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    $template->param( return => $is_valid );
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    output_html_with_http_headers $cgi, $cookie, $template->output;
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    output_html_with_http_headers $cgi, $cookie, $template->output;
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};
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};
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- 

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