Basic HTML version of Foils prepared April 16,1996

Foil 40 Some Predefined Variables in Perl - I

From Perl5 and Advanced Perl4 Features Computational Science for Information Age Course CPS616 Material -- April 16,1996. by Geoffrey C. Fox
There are the original cryptic two character names and those with a more mnemonic value which are accessible if one invokes
  • use english; # pragma
Here are a few examples -- we gave some of the predefined variables defining formatted output in first Perl foilset
$ARG or $_ is default name when nothing specified
  • s/rubbish//; # is equivalent to
  • $_ =~ s/rubbish/;
  • chomp(); # is equivalent to
  • chomp($_); # etc.

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