Not able understand logic and working

Tags

Top Forums UNIX for Beginners Questions & Answers Answers to Frequently Asked Questions Not able understand logic and working

09-12-2018

Registered User

15,129, 5,008

Join Date: Jul 2012

Last Activity: 4 May 2020, 4:31 PM EDT

Location: Aachen, Germany

Posts: 15,129

Thanks Given: 735

Thanked 5,008 Times in 4,483 Posts

And (apart from the clumsy one-liner) the question is? Why don't you analyse the looong pipe step by step? Does the result (a sample of which might have been helpful) satisfy your needs?

RudiC

View Public Profile for RudiC

Find all posts by RudiC

Previous Thread | Next Thread

2 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Need to understand a couple of Shell Logic

Hi, I am trying what the following loop does : for i in XYZ do for j in M1 R1 R2 R3 do if then kList="" n=1 while do kList="$kList $n" let n++ done There are a couple of loop as mentioned above for R1.R2.R3.

2. Solaris

Cant understand the File system working nature

Hi, We have a filesystem whose usage has gone above 81%, i tried to zip some files in the sub directories but the space is not released in the main file system. > df -h Filesystem size used avail capacity Mounted on /u01/app 5.8G 4.6G 1.2G 81% ...

LEARN ABOUT CENTOS

perl::critic::policy::controlstructures::prohibitunlessblocks

Perl::Critic::Policy::ControlStructures::ProhibitUnlessBUsersContributed Perl DocuPerl::Critic::Policy::ControlStructures::ProhibitUnlessBlocks(3)

NAME

       Perl::Critic::Policy::ControlStructures::ProhibitUnlessBlocks - Write "if(! $condition)" instead of "unless($condition)".

AFFILIATION

       This Policy is part of the core Perl::Critic distribution.

DESCRIPTION

       Conway discourages using "unless" because it leads to double-negatives that are hard to understand.  Instead, reverse the logic and use
       "if".

	   unless($condition) { do_something() } #not ok
	   unless(! $no_flag) { do_something() } #really bad
	   if( ! $condition)  { do_something() } #ok

       This Policy only covers the block-form of "unless".  For the postfix variety, see "ProhibitPostfixControls".

CONFIGURATION

       This Policy is not configurable except for the standard options.

SEE ALSO

       Perl::Critic::Policy::ControlStructures::ProhibitPostfixControls

AUTHOR

       Jeffrey Ryan Thalhammer <jeff@imaginative-software.com>

COPYRIGHT

       Copyright (c) 2005-2011 Imaginative Software Systems.  All 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::ControlStructures::ProhibitUnlessBlocks(3)

Answers to Frequently Asked Questions