Hi,
I'm struggling with a regex that would match a 'b' that follows an 'a' and is at the end of a string of non-white characters. For example:
Line 1: aba abab b abb aab bab baa
I can find the right strings but I'm lacking knowledge of how to "discard" the bits that precede bs.... (2 Replies)
Hi All,
I have file.txt with contents like this:
random text
To: recipient@email.co.uk
<HTML>S7randomtext more random text
random text
To: recip@smtpemail.com
<HTML>E5randomtext more random text
random text
I need the output to look like this:
1,,,1,S7
1,,,1,E5
My code so... (9 Replies)
Hi All,
@months = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
$day=091023;
$day_combine = $day;
$day_combine =~ s/({2})({2})({2})/20$1-$months-$3/;
Instead of three lines, is possible to combine the last two lines into a single line? means no need assign $day to $day_combine... (2 Replies)
I am trying to match a pattern exactly in a shell script. I have tried two methods
awk '/\<mpath${CURR_MP}\>/{print $1 $2}' multipath
perl -ne '/\bmpath${CURR_MP}\b/ and print' /var/tmp/multipath
Both these methods require that I use the escape character. I am guessing that is why... (8 Replies)
hello,
I am writting a regular expression that intend to match any tunnel or serial interface but it doesn't mtach any serial sub-interface.
For example, statement should match "Tunnel3" or "Serial0/1" but shouldn't match "Serial0\1.1" (doesn't include dot ".")
I tried the following but... (3 Replies)
Hi I just started on GNU Grep with regex and am finding it very challenging and need to ask for help already...
here is the problem, I have a page (MYFILE) which consists of the following....
<div>
<input type="hidden" name="__EVENTTARGET" id="__EVENTTARGET" value="" />
<input type="hidden"... (2 Replies)
Dear all,
I have a specific problem that I don't quite understand how to solve. I have two files, both of the same format:
XXXXXX_FIND1 bla bla bla
bla
bla
bla
bla
bla
bla
bla
bla
bla
========
(return)
XXXXXX_FIND2 bla bla bla
bla
bla
bla (10 Replies)
Hello,
Awk seem treat the pattern as regular expression, how can awk search not using regular expression? e.g. just represent for "", not "A" or "a" . I don't want to add backslash . (2 Replies)
I need to fetch particular string from log file based on grep condition match.
Actual requirement is need to print the next word from the same line based on grep string condtion match.
File :Java.lanag.xyz......File copied completed : abc.txt
Ouput :abc.txt
I have used below... (5 Replies)
Here is the content of a file:
abcdefgh
1234
When I do:
grep a?c <file>
I expect the output to show "abcdefgh". Its not happening. Any ideas?
"a?c" should mean either ac or c. This should mean the first line is a match. Yet its not happening. I have tried with -e option in grep, with... (1 Reply)
Discussion started by: Rameshck
1 Replies
LEARN ABOUT DEBIAN
poe::filter::grep
POE::Filter::Grep(3pm) User Contributed Perl Documentation POE::Filter::Grep(3pm)NAME
POE::Filter::Grep - select or remove items based on simple rules
SYNOPSIS
#!perl
use POE qw(
Wheel::FollowTail
Filter::Line Filter::Grep Filter::Stackable
);
POE::Session->create(
inline_states => {
_start => sub {
my $parse_input_as_lines = POE::Filter::Line->new();
my $select_sudo_log_lines = POE::Filter::Grep->new(
Put => sub { 1 },
Get => sub {
my $input = shift;
return $input =~ /sudo[d+]/i;
},
);
my $filter_stack = POE::Filter::Stackable->new(
Filters => [
$parse_input_as_lines, # first on get, last on put
$select_sudo_log_lines, # first on put, last on get
]
);
$_[HEAP]{tailor} = POE::Wheel::FollowTail->new(
Filename => "/var/log/system.log",
InputEvent => "got_log_line",
Filter => $filter_stack,
);
},
got_log_line => sub {
print "Log: $_[ARG0]
";
}
}
);
POE::Kernel->run();
exit;
DESCRIPTION
POE::Filter::Grep selects or removes items based on simple tests. It may be used to filter input, output, or both. This filter is named
and modeled after Perl's built-in grep() function.
POE::Filter::Grep is designed to be combined with other filters through POE::Filter::Stackable. In the "SYNOPSIS" example, a filter stack
is created to parse logs as lines and remove all entries that don't pertain to a sudo process. (Or if your glass is half full, the stack
only selects entries that DO mention sudo.)
PUBLIC FILTER METHODS
In addition to the usual POE::Filter methods, POE::Filter::Grep also supports the following.
new
new() constructs a new POE::Filter::Grep object. It must either be called with a single Code parameter, or both a Put and a Get parameter.
The values for Code, Put, and Get are code references that, when invoked, return true to select an item or false to reject it. A Code
function will be used for both input and output, while Get and Put functions allow input and output to be filtered in different ways. The
item in question will be passed as the function's sole parameter.
sub reject_bidoofs {
my $pokemon = shift;
return 1 if $pokemon ne "bidoof";
return;
}
my $gotta_catch_nearly_all = POE::Filter::Grep->new(
Code => &reject_bidoofs,
);
Enforce read-only behavior:
my $read_only = POE::Filter::Grep->new(
Get => sub { 1 },
Put => sub { 0 },
);
modify
modify() changes a POE::Filter::Grep object's behavior at run-time. It accepts the same parameters as new(), and it replaces the existing
tests with new ones.
# Don't give away our Dialgas.
$gotta_catch_nearly_all->modify(
Get => sub { 1 },
Put => sub { return shift() ne "dialga" },
);
SEE ALSO
POE::Filter for more information about filters in general.
POE::Filter::Stackable for more details on stacking filters.
BUGS
None known.
AUTHORS & COPYRIGHTS
The Grep filter was contributed by Dieter Pearcey. Documentation is provided by Rocco Caputo.
Please see the POE manpage for more information about authors and contributors.
perl v5.14.2 2012-05-15 POE::Filter::Grep(3pm)