/usr/share/doc/perl-Filter/examples/closure
package Joe2Jim ; use Filter::Util::Call ; use strict ; use warnings ; sub import { my($type) = @_ ; filter_add( sub { my($status) ; s/Joe/Jim/g if ($status = filter_read()) > 0 ; $status ; }) } 1 ;
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..
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Count.pm
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Decompress.pm
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Include.pm
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Joe2Jim.pm
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NewSubst.pm
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Subst.pm
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UUdecode.pm
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