Relatively new to scripting, but really struggling with something that will no doubt be second nature to most people on here:
Trying to get an exact match on $sub, where sub is an ip address.
As a testing mechanism I've created a file called subnet, containing 111.222.333.0, but no matter what I seem to do, I can't get it to match and "only" match the exact content of subnet.
Below is the scenario. Help is appreciated.
File1: ( 500,000 lines ) : Three fields comma delimited : Not sorted
1234FAA,435612,88975
1224FAB,12345,212356
File2: ( 4,000,000 lines ) : Six fields comma delimited (Last 3 field should match the 3 fields of File1) : Not Sorted :
... (13 Replies)
Hello All,
I am trying to match white space in patterns through - Grep
I tried ] & ] but none of them worked.
Then I tried Perl extension '\s' and it worked.
So just wanted to know if ] & ] are still supported or have they become deprecated.
However they have been mentioned in the... (3 Replies)
Hi,
I have a file f1 wi the following data
f1.txt
========
Report ID
Report Name
-----------------------------------------------------------------
Post Requests : 2 Post successes : 2
=============================================
I need to search for the... (2 Replies)
Hi,
I need to make a script to extract the number that are not in a file.
Example:
I have file-A that has 100000 (70000-799999) numbers. And a file-B with number that already are in the system. Now I need to know/get the numbers that are not in system.
I was thinking something like this:... (5 Replies)
I wrote a Bash script which checks to see if a text string exists on a web page and then sends me an email if it does (or does not e.g. "Out of stock"). I run it from my crontab, it's quite handy from time to time and I've been using it for a few years now.
The script uses wget to download an... (6 Replies)
I am totally unexperienced in writing scripts of any kind.
I am working on Mac OS X and would like to run a shell script to find files in a directory that do not conform to a specific naming convention and print to a text file in the same directory.
For example, I have a folder called... (9 Replies)
I am trying to find patterns in files using grep -l -e. I specifically am searching for abc. I want any file that has abc in it, but not just the letters abc. I am searching for a pattern a followed by b followed by c. I have tried egrep -l and also I have tried the following:
grep -el... (2 Replies)
I am trying to understand what the grep command in ubuntu is trying to do here.
The contents of my test file is given below
harsha@harsha-H67MA-USB3-B3:~/Documents$ cat data
abcd
efghi
jklmno
pqr
stuv
wxyz
When I grep for 3 dots (...) without the parenthesis as follows I would expect the... (4 Replies)
May somebody can give me a hint. I want to find using the command "grep" a certain word or term in a foo.txt file. By using the following command
grep -i word file1 > newfile4
it puts it into a new foo.txt-file, the n times it matches. Fine, it matches n times, but how could I specify where... (2 Replies)
Perl::Critic::Policy::BuiltinFunctions::ProhibitBooleanGUser3Contributed Perl DocumePerl::Critic::Policy::BuiltinFunctions::ProhibitBooleanGrep(3)NAME
Perl::Critic::Policy::BuiltinFunctions::ProhibitBooleanGrep - Use "List::MoreUtils::any" instead of "grep" in boolean context.
AFFILIATION
This Policy is part of the core Perl::Critic distribution.
DESCRIPTION
Using "grep" in boolean context is a common idiom for checking if any elements in a list match a condition. This works because boolean
context is a subset of scalar context, and grep returns the number of matches in scalar context. A non-zero number of matches means a
match.
But consider the case of a long array where the first element is a match. Boolean "grep" still checks all of the rest of the elements
needlessly. Instead, a better solution is to use the "any" function from List::MoreUtils, which short-circuits after the first successful
match to save time.
CONFIGURATION
This Policy is not configurable except for the standard options.
CAVEATS
The algorithm for detecting boolean context takes a LOT of shortcuts. There are lots of known false negatives. But, I was conservative in
writing this, so I hope there are no false positives.
AUTHOR
Chris Dolan <cdolan@cpan.org>
CREDITS
Initial development of this policy was supported by a grant from the Perl Foundation.
COPYRIGHT
Copyright (c) 2007-2011 Chris Dolan. Many rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The full text of this license
can be found in the LICENSE file included with this module.
perl v5.16.3 2014-06-09 Perl::Critic::Policy::BuiltinFunctions::ProhibitBooleanGrep(3)