10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I am searching for an exact match on a value read from another file to lookup an email address in another file. The file being checked is called "contacts" and it has Act #, email address, and contact person.
1693;abc1693@yahoo.comt;Tommy D
6423;abc6423@yahoo.comt;Jim Doran... (2 Replies)
Discussion started by: ziggy6
2 Replies
2. UNIX for Dummies Questions & Answers
I have a flat file that looks like this, let's call it Chromosome_9.txt:
FT /Gene_Name="Guanyl-Acetylase 9"
FT /Gene_Number"36952"
FT /Gene_Name="Endoplasmic Luciferase"
FT /Gene_Number"36953"
FT ... (4 Replies)
Discussion started by: Twinklefingers
4 Replies
3. Shell Programming and Scripting
Hi I would appreciate your help with this.
I have a output file from a command. It is broken based on initial of the users. Exmaple of iitials MN & SS. Under each section there is information pertaining to the user however each section can have different number of lines. MY challenge is to ... (5 Replies)
Discussion started by: mnassiri
5 Replies
4. Shell Programming and Scripting
Hi Friends,
I'm a great fan of this forum... it has helped me tone my skills in shell scripting. I have a challenge here, which I'm sure you guys would help me in achieving...
File A has a list of job ids and I need to compare this with the File B (*.log) and File C (extend *.log) and copy... (6 Replies)
Discussion started by: asnandhakumar
6 Replies
5. Shell Programming and Scripting
Hi all,
I'll like to search a list of tems in a huge file and then output each of the terms to individual files. I know I can use grep -f list main.file to search them but how can I split the output into individual files? Thank you. (6 Replies)
Discussion started by: ivpz
6 Replies
6. UNIX for Dummies Questions & Answers
Hi All !
As a dummy, I try to search for multiple string of characters contained in 2 types of list.
Not clear? No it's not.
Example:
I have a tab-delimited file called "inventory" with 2 columns that looks like that:
#ref #year,color
xrt3 2000,blue
gf5 2000,red,green,yellow... (4 Replies)
Discussion started by: lucasvs
4 Replies
7. Shell Programming and Scripting
Hello,
I'm interested in finding all occurrences of the terms in file1 in file2, which are both csv files. I can do this with a loop but I'm interested in knowing if I can also do it with the help of xargs and grep. What I have tried:
cat file1 | xargs grep file2
The problem is that... (15 Replies)
Discussion started by: eon
15 Replies
8. Shell Programming and Scripting
Hi-
I am trying to search a large file with a number of different search terms that are listed one per line in 3 different files. Most importantly I need to be able to do a case insensitive search.
I have tried just using egrep -f but it doesn't seam to be able to handle the -i option when... (3 Replies)
Discussion started by: dougzilla
3 Replies
9. UNIX for Dummies Questions & Answers
Hi,
I want to list filenames instead of lines when i search in compresed files for a string.
#gzcat *.gz | grep -l 12345
gives me:
<stdin>
Anyone got a solution on this problem? (2 Replies)
Discussion started by: HugoH
2 Replies
10. UNIX for Dummies Questions & Answers
How will you list only the empty lines in a file (using grep) (1 Reply)
Discussion started by: JosephGerard
1 Replies
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)