Hi,
When we "grep" for a word in a file, it returns the lines containing the word that we searched for. Is there a way to display only the words and not the entire line containing them.
Thanks
Ananth (6 Replies)
hi, consider the below line in a text file,
'Y',getdate(),'N','V',NULL .....
'N',getdate(),'Y','D',NULL .....
'Y','N','Y',getdate(),'Y','D',NULL ....
as u see above, i want only the second word after the getdate() word...
getdate() will not come 2nd word alwys it may be any position but i... (11 Replies)
Hi all,
I want to delete all lowercase characters from my file, but only strings of length 7 and more.
For example, how can I go from:
JHGEFigeIGDUIirfyfiyhgfoiyfKJHGuioyrDHG
To:
JHGEFigeIGDUIKJHGuioyrDHG
There should be a trick to add to sed 's///g', but I can't figure it out.... (2 Replies)
ok, so this is proving to be kind of difficult even though it should not be.
say for instance I want to grep out ONLY the word fkafal from the below output, how do I do it?
echo ajfjf fjfjf iafjga fkafal foeref afoafahfia | grep -w "fkafal"
If i run the above command, i get back all the... (4 Replies)
Hi,
I have input file as below. Can you help me?
inac_4y;0;2;Balance;200;1;1;
0;2;Balance;100;1;
0;inac_nq;0;1;Balance;100;1
desired output
Balance;200
Balance;100
Balance;100
-Suresh
Please use and tags when posting code, data or logs etc. to preserve formatting... (5 Replies)
Hi all,
FileOne
family balance >>>>>
0 0
0 0
java.io.FileNotFoundException: Settings.xml (No such file or directory)
at java.io.FileInputStream.open(Native Method)
..
....
.....
.....
java.lang.NullPointerException
...
.....
......
Stacktrace:
at... (2 Replies)
I want to search a bunch of files and list only those containing a minimum number of pattern matches. So if I want to identify files containing 3 (or more) instances of the pattern "said:" and I have file1 that contains the lines:
He said:
She said:
and file2 that contains the lines:
He... (3 Replies)
Hi
can we grep for a word and print the next word of the greped word?
ex:- create or replace function function_name
create function function_name
we should search for word "function" and output next word "function_name" from both lines. (3 Replies)
I have a file input.txt which have loads of weird characters, html tags and useful materials. I want to display 35 characters after the word description excluding weird characters like $$#$#@$#@***$# and without html tags in the new file output.txt. Help me. Thanx in advance.
My final goal is to... (11 Replies)
I have a file input.txt which have loads of weird characters, html tags and useful materials. I want to display 35 characters after the word "description" excluding weird characters like $&lmp and without html tags in the new file output.txt. Help me. Thanx in advance. I have attached the input... (4 Replies)
Discussion started by: sachit adhikari
4 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)