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is it some special kind of variable on the 10th line of our last example?
10: $::PROGRAM = basename $0;

You don't indicate which of the two variables in that line that you haven't encountered before.

  1. $::PROGRAM

    This is a package global variable in main. $::var is equivalent to $main::var.

    See one of broquaint's other tutorial's Of Symbol Tables and Globs for more information if that was the source of your question.

    The all upper case is a loose convention used to indicate global variables.

  2.  $0

    This is documented in perlvar. Search for the text "$PROGRAM_NAME".

HTH.


Examine what is said, not who speaks.
"Efficiency is intelligent laziness." -David Dunham
"Think for yourself!" - Abigail
Timing (and a little luck) are everything!


In reply to Re: Re: Closure on Closures by BrowserUk
in thread Closure on Closures by broquaint

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