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Top Forums Shell Programming and Scripting Show file name included time information Post 303026079 by RudiC on Monday 19th of November 2018 04:47:44 PM
Old 11-19-2018
So - what did you change from post#3 to #5?


Date / time arithmetic is among the ugliest problems in IT. Try this slightly adapted version that IS NOT PREPARED to cross midnight:

Code:
for FN in 2007*.txt; do T1=${FN#*T}; T1=${T1%.*}; if (( T1 - 3000 <= T2)); then echo $OFN$'\n'$FN; fi; OFN=$FN; T2=$T1; done
2007-12-27T150000.txt
2007-12-27T153000.txt
2007-12-27T153000.txt
2007-12-28T000000.txt
2007-12-28T000000.txt
 2007-12-28T003000.txt


EDIT: seems to cross midnight, but is far from robust:



Code:
for FN in 2007*.txt; do T1=${FN#*T}; T1=${T1%.*}; if (( (240000 + 10#$T1 - 10#$T2) % 240000 <= 3000)); then echo $OFN$'\n'$FN; fi; OFN=$FN; T2=$T1; done
2007-12-27T150000.txt
2007-12-27T153000.txt
2007-12-28T000000.txt
2007-12-28T003000.txt


Last edited by RudiC; 11-19-2018 at 06:04 PM..
 

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Date::Calc::PP(3)					User Contributed Perl Documentation					 Date::Calc::PP(3)

NAME
Date::Calc::PP - pure-Perl plug-in for Date::Calc SYNOPSIS
You never use this module directly. Use Date::Calc(3) instead! DESCRIPTION
You never use this module directly. Use Date::Calc(3) instead! SEE ALSO
Date::Calc(3), Date::Calc::XS(3). VERSION
This man page documents "Date::Calc::PP" version 6.3. AUTHOR
Steffen Beyer mailto:STBEY@cpan.org http://www.engelschall.com/u/sb/download/ COPYRIGHT
Copyright (c) 1995 - 2009 by Steffen Beyer. All rights reserved. LICENSE
This package is free software; you can use, modify and redistribute it under the same terms as Perl itself, i.e., at your option, under the terms either of the "Artistic License" or the "GNU General Public License". The C library at the core of the module "Date::Calc::XS" can, at your discretion, also be used, modified and redistributed under the terms of the "GNU Library General Public License". Please refer to the files "Artistic.txt", "GNU_GPL.txt" and "GNU_LGPL.txt" in the "license" subdirectory of this distribution for any details! DISCLAIMER
This package is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the "GNU General Public License" for more details. perl v5.12.1 2009-10-31 Date::Calc::PP(3)
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