Ah, well the last time I used this construct it was for a function that could accept either a unix timestamp as a scalar, or a time vector as returned by localtime() or gmtime().

So I was checking the length of @_ to see if it was greater than 1 (not 0), like this:

sub unix_to_datetime {
  my @time_vec;
  @time_vec = @_ if @_>1;
  unless (@time_vec) {
    my $time = shift;
    @time_vec = (defined $time ? localtime($time) : localtime);
  }
  return strftime('%Y-%m-%d %H:%M:%S', @time_vec);
}

[download]

In reply to Re: Re: Conditional initialisation by Akhasha
in thread Conditional initialisation by Akhasha

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.