Basic HTML version of Foils prepared Sept 20 97

Foil 40 Some Predefined Variables in Perl - I

From Perl5 and Advanced Perl4 Features Computational Science for Information Age Course CPS616 -- Sept 20 97. by Geoffrey C. Fox,Nancy McCracken,Tom Scavo
1 There are the original cryptic two character names and those with a more mnemonic value which are accessible if one invokes
  • use English; # pragma
2 Here are a few examples -- we gave some of the predefined variables defining formatted output in first Perl foilset
3 $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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