It works, so long as each element is 0 padded, and you're using consistent delimiters between the two items to be compared. The following won't work:

'2004-9-1' lt '2004-10-1'
'2004/09/01' lt '2004-09-01'

[download]

I typically get around the second issue by stripping out all non-digits, and then comparing. The first one I haven't found a simple one-line solution for, as I get stuff that's both delimited and run together. If it was always delimited:

sub normalize_date { return join( '', map { sprintf( '%02i', $_ ) } sp
+lit (/\D+/, $_[0]) ) }
sub compare_dates { return normalize_date($_[0]) cmp normalize_date($_
+[1]) }

[download]

hmm ... I guess this _would_ work for me, as the non-delimited stuff I get is always 0 padded.

In reply to Re^2: What is a stringwise operator? by jhourcle
in thread What is a stringwise operator? by blahblah

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.