Regular Expressions

Matching (contains)

• The Perl operator to determine a match is the /regexp/ construct.
• By default, this operator works on the $_ variable.

• To select a different variable to be operated on, use the =~ operator.

• Example:
  

  $theVar = "This is a test";
  $_ = "This is a test";
  
  if ($theVar =~ /is a tes/) {
      (print "Match One\n");  # Would Match
  }
  if (/is a tes/) {
      (print "Match One\n");  # Would Also Match
  }
  if ($theVar =~ /is not a tes/) {
      (print "Match Two\n");  # Would Not Match 
  }