A few random thoughts that maybe the purveyor of your library could take note of:

• The new function typically is used for creating new objects. It makes little-to-no sense (to me) for a singleton. Better would be a package method of "get_instance" or something.
• Exposing your singleton object is required in straight-jacket-type languages. Not so much in Perl. Why not just Vendor::Library->some_method(), which would use code like this?

    my $_global;
    sub _self_or_create
    {
      my $self = shift;
      return $self if (ref $self and $self->isa(__PACKAGE__))
      $_global ||= __PACKAGE__->_new();
      return $_global; # assume $self eq __PACKAGE__ or something derive
  +d from it?
    }
  [download]

  You could put more bondage into that by checking ref $self eq __PACKAGE__ instead of isa, but that's the basic idea. From there, the top of each function would simply look like:

    sub some_method
    {
      my $self = _self_or_create(shift);
      # ...
    }
  [download]

  At this point, you're back to where you started, but the user doesn't need to instantiate anything, and then won't be tempted to do silly things like create two of them.
• And for you, maybe not having two creation statements in the same scope? :-)

  {
    my $obj = Vendor::Library->new(...);
    # code here
  }
  {
    my $obj = Vendor::Library->new(...);
    # different code here (I presume)
  }
  [download]

  I have a (probably irrational) fear about explicitly assigning undef. It just smells funny to me. :-)

---

---

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! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

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:
	&		&
	<		&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.