[oak perl] The mysterious "undef"

[David Alban]

On Fri, 18 Mar 2005 09:22:49 -0800, Kester Allen <kester at gmail.com> wrote:
> perldoc -f defined has some good text on this.

See also:

  perldoc -f undef

Yes, Virginia, undef is a function!

Sandy, when you get the hang of defined vs. not defined, then you can
tackle defined vs. exists  (perldoc -f exists), and the concept of
autovivification.

P.S.  I had another reply to this thread.  Inadvertently applied vim
finger habits to gmail editor.  My reply disappeared.  Don't know
whether I sent it or trashed it.  It happened so fast!  The darker
side of finger habits...
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