I'll do this in two steps. First I'll check that the date is indeed eight digits, then I'll check if it refers to a valid date with the Date::Manip module (so this will fail with historical dates using the Julian calendar).
perl -we 'use Date::Manip; sub valid_yyyymmdd { $_[0] =~ /^(\d{8})$/ a
+nd ParseDate($1) and 1; } valid_yyyymmdd($_) and print "$_\n" for qw"
+20060630 20060631 20060730 20060731 20060732 2006.07.30 06.07.31";'
Output:
20060630
20060730
20060731
-
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.
|