I like to validate the format as long as I'm re-formatting (note this does not actually completely validate the dates, see what happens to some invalid end of month dates below):
use Time::Piece;
my @have = ('1/2/2003', '2/31/2014', '4/31/2015', '4/5/2006', '10/11/2
+012');
for my $dt (@have) {
my $d = eval { Time::Piece->strptime($dt, '%m/%d/%Y') } or warn "Inv
+alid date $dt\n";
next unless $d;
my $ymd = $d->ymd();
print "$dt => $ymd\n";
}
DateTime will validate the date more completely:
use strict;
use warnings;
use DateTime::Format::Strptime;
my $f = DateTime::Format::Strptime->new(
pattern => '%m/%d/%Y',
);
my @have = ('1/2/2003', '2/32/2013', '4/31/2014', '4/5/2006', '10/11/2
+012');
for my $dt (@have) {
my $d = $f->parse_datetime($dt) or warn "Invalid date $dt\n";
next unless $d;
my $ymd = $d->ymd();
print "$dt => $ymd\n";
}
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.