Monks, In reading the Perl OO tutorial perltooc I noted this code in the Indirect References to Class Data section:
package Some_Class; our($CData1, $CData2); sub new { my $obclass = shift; return bless my $self = { ObData1 => "", ObData2 => "", CData1 => \$CData1, CData2 => \$CData2, } => (ref $obclass || $obclass); }
My question is about the use of the => comma like operator.

Why?

sub new { my $class = shift; return bless my $self = {}, (ref $class || $class); }
seems to work just as well.

Does anyone know of any reason why => might be used in place of , in this instance?

Interestingly, this has let to a clarification on the meaning of => for me.

I had always assumed that => stringifies its left operand, but a little testing, seems to indicate it only actually stringifies if it thinks the left operand is a word... i.e. not a $var - subtle!

Regards,

Jeff


In reply to bless with => separated args by jaa

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.