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Top Forums UNIX for Dummies Questions & Answers Date column validation in files Post 302925605 by derekludwig on Tuesday 18th of November 2014 05:57:36 AM
Old 11-18-2014
YMMV...
Code:
use strict;
use warnings;
use Time::Local;

sub ckdate {
   my ($year, $mon, $mday) = @_;
   return join '', @_ if defined eval { timegm(0, 0, 0, $mday, $mon-1, $year); };
   return join '', '<span class="highlight">', @_, '</span>';
}

while (<>) {
   s{(\d{4})(\d\d)(\d\d)}{ckdate($1, $2, $3)}e;
   print;
}

---------- Post updated at 05:57 AM ---------- Previous update was at 05:56 AM ----------

generates:
Code:
20110227
           20120528
           <span class="highlight">20141142</span>
            <span class="highlight">20110230</span>

 

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Time::localtime(3pm)					 Perl Programmers Reference Guide				      Time::localtime(3pm)

NAME
Time::localtime - by-name interface to Perl's built-in localtime() function SYNOPSIS
use Time::localtime; printf "Year is %d ", localtime->year() + 1900; $now = ctime(); use Time::localtime; use File::stat; $date_string = ctime(stat($file)->mtime); DESCRIPTION
This module's default exports override the core localtime() function, replacing it with a version that returns "Time::tm" objects. This object has methods that return the similarly named structure field name from the C's tm structure from time.h; namely sec, min, hour, mday, mon, year, wday, yday, and isdst. You may also import all the structure fields directly into your namespace as regular variables using the :FIELDS import tag. (Note that this still overrides your core functions.) Access these fields as variables named with a preceding "tm_" in front their method names. Thus, "$tm_obj->mday()" corresponds to $tm_mday if you import the fields. The ctime() function provides a way of getting at the scalar sense of the original CORE::localtime() function. To access this functionality without the core overrides, pass the "use" an empty import list, and then access function functions with their full qualified names. On the other hand, the built-ins are still available via the "CORE::" pseudo-package. NOTE
While this class is currently implemented using the Class::Struct module to build a struct-like class, you shouldn't rely upon this. AUTHOR
Tom Christiansen perl v5.18.2 2013-11-04 Time::localtime(3pm)
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