use strict;
my $str = '303488 -rw------- 1 oagmgr oinstall 596971520 May 10 15:54 core.10081
271392 -rw------- 1 oagmgr oinstall 543047680 Aug 16 09:59 core.1708
310616 -rw------- 1 oagmgr oinstall 621223936 Jul 29 09:05 core.21813
261296 -rw------- 1 oagmgr oinstall 524054528 Sep 4 08:29 core.25532
292500 -rw------- 1 oagmgr oinstall 469028864 Jun 25 19:45 core.32008
291580 -rw------- 1 oagmgr oinstall 600080384 Jul 11 22:08 core.7981
365072 -rw------- 1 oagmgr oinstall 484425728 Jun 2 14:08 core.8238
24 -rw-r--r-- 1 oagmgr oinstall 23606 Aug 16 09:59 hs_err_pid1708.log
24 -rw-r--r-- 1 oagmgr oinstall 23436 Apr 4 21:19 hs_err_pid18984.log
24 -rw-r--r-- 1 oagmgr oinstall 23421 Sep 4 08:29 hs_err_pid25532.log
24 -rw-r--r-- 1 oagmgr oinstall 23497 Jul 11 22:08 hs_err_pid7981.log
24 -rw-r--r-- 1 oagmgr oinstall 24080 Jun 2 14:08 hs_err_pid8238.log ';
my $regex = qr`core\.\d*`mp;
if ( $str =~ /$regex/g ) {
print "Whole match is ${^MATCH} and its start/end positions can be obtained via \$-[0] and \$+[0]\n";
# print "Capture Group 1 is $1 and its start/end positions can be obtained via \$-[1] and \$+[1]\n";
# print "Capture Group 2 is $2 ... and so on\n";
}
# ${^POSTMATCH} and ${^PREMATCH} are also available with the use of '/p'
# Named capture groups can be called via $+{name}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Perl, please visit: http://perldoc.perl.org/perlre.html