Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl Monk, Perl Meditation

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

Most likely the 'load it if we need it' failed for a second object because PDL was already loaded. I was thinking more in terms of "use it if it's available" in any case. The following code implements that:

use strict; use warnings; package TestPDL; my $PDLLoaded = eval { require ''; PDL->import (); 1; }; sub new { my ($class, %params) = @_; $params{havePDL} = $PDLLoaded; return bless \%params, $class; } package main; my $obj = TestPDL->new (); my $obj2 = TestPDL->new (); print $obj2->{havePDL} ? "Have PDL available" : "PDL not present or object create failed";

I'd write one basic object that does common stuff then derive from that to specialise for additional capabilities. Following that thought, I'd arrange the name space as Sport::Analytics::SRS for the basic module then Sport::Analytics::SRS::Cricket for the Cricket specialisation.

This technique allows a PDL only implementation for tricky or computationally expensive stuff with a pure Perl implementation provided either in the module or in a derived class at some point in the future if there is a need for it.

True laziness is hard work

In reply to Re^3: From test harness to CPAN by GrandFather
in thread From test harness to CPAN by dwm042

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, 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, 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.
  • Log In?

    What's my password?
    Create A New User
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others lurking in the Monastery: (7)
    As of 2018-08-21 12:01 GMT
    Find Nodes?
      Voting Booth?
      Asked to put a square peg in a round hole, I would:

      Results (198 votes). Check out past polls.