A positive look behind : Anchors « Regular Expression « Perl

1. Perl
2. Regular Expression
3. Anchors

A positive look behind

    

$string="chocolate/cake/milk/ice cream.";
$string =~ s/(?<= chocolate) milk/ candy/;
print "$string\n";

$string="this is a test.";
$string =~ s/(?<=a test) is/ is not/;
print "$string\n";

   
    
    
    
  

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