I don't have the camel book and could not find an online version. I also don't see anything in the doc that ships with the perl installation. But I did find this at http://perldoc.perl.org/SelfLoader.html#The-__DATA__-token and it helps:
"The __DATA__ token tells the perl compiler that the perl code for compilation is finished. Everything after the __DATA__ token is available for reading via the filehandle FOOBAR::DATA..." "Everything after the __DATA__ token is available for reading..." is the part that I was unsure about. Now I know! Thanks, Phil On Wed, May 2, 2012 at 10:01 AM, Rothenmaier, Deane <deane.rothenma...@walgreens.com> wrote: > See p. 68 of the third edition of the Camel book... > > "The __DATA__ token functions similarly to the __END__ token, but opens the > DATA filehandle within the current package's namespace, so that files you > require can each have their own DATA filehandles open simultaneously. For > more information, see DATA in Chapter 28." > > HTH, > > Deane Rothenmaier > Programmer/Analyst - IT-StdCfg > Walgreens Corp. > 2 Overlook Point #N51022D > MS 6515 > Lincolnshire, IL 60069 > 224-542-5150 > > The more corrupt the republic, the more numerous the laws. -- Tacitus > > -----Original Message----- > From: activeperl-boun...@listserv.activestate.com > [mailto:activeperl-boun...@listserv.activestate.com] On Behalf Of Phillip > Richcreek > Sent: Wednesday, May 02, 2012 8:56 AM > To: activeperl@listserv.activestate.com > Subject: Inline test data > > A recent post used a nice feature for providing test data to a script. > (See __DATA__ below) I've seen it before but never understood it. How does it > work? What signals the end of the data to the while (my $line = <DATA>) { ? > Is this a type of here document? Can someone point me where it's descibed in > the perl doc? > > TIA, > Phil > > > >> use warnings; >> use constant {SECS_PER_DAY => 24 * 60 * 60}; use POSIX qw{strftime}; >> >> my $startDate = strftime "%Y-%m-%d_", localtime(); my $endDate = >> strftime "%Y-%m-%d_", localtime(time + 2 * SECS_PER_DAY); my $dateRE = >> qr{\d{4}-\d{2}-\d{2}_}; >> >> while (my $line = <DATA>) { >> if ($line =~ m/^start_date/) { >> $line =~ s/$dateRE/$startDate/g; >> } >> elsif ($line =~ /^end_date/) { >> $line =~ s/$dateRE/$endDate/g; >> } >> print $line; >> } >> >> __DATA__ >> First line >> start_date = '2012-04-29_00:00:00', '2012-04-29_00:00:00', >> '2012-04-29_00:00:00', end_date = '2012-05-01_00:00:00', >> '2012-05-01_00:00:00', '2012-05-01_00:00:00', Last line >> >> HTH >> >> -- >> Brian Raven > _______________________________________________ > ActivePerl mailing list > ActivePerl@listserv.ActiveState.com > To unsubscribe: http://listserv.ActiveState.com/mailman/mysubs > _______________________________________________ ActivePerl mailing list ActivePerl@listserv.ActiveState.com To unsubscribe: http://listserv.ActiveState.com/mailman/mysubs
