Basic HTML version of Foils prepared Sept 20 97

Foil 41 Some Predefined Variables in Perl - II

From Perl5 and Advanced Perl4 Features Computational Science for Information Age Course CPS616 -- Sept 20 97. by Geoffrey C. Fox,Nancy McCracken,Tom Scavo
A match m/regexp/; or equivalent s pattern match sets
$MATCH or $& -- The matched string
$PREMATCH or $` to be string before matched string
$POSTMATCH or $' to be string after matched string
$LAST_PAREN_MATCH or $+ contains material in last paranthesis matched
  • useful when | syntax in regular expression make in unclear which $n is set for last paranthesis

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