A positive look ahead : Anchors « Regular Expression « Perl






A positive look ahead

    

$string="I love chocolate.";
$string =~ s/chocolate(?= ice)/vanilla/;
print "$string\n";

$string="this is a test.";
$string =~ s/this(?=is)/test/g;
print "$string\n";

   
    
    
    
  








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4.Check end
5.End of line anchor
6.A negative look ahead
7.A negative look behind
8.A positive look behind
9.Anchoring Metacharacters
10.Beginning of line anchor
11.Clustering and anchors
12.Beginning and end of word anchors
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14.Searching from the beginning and the end
15.Shouldn't start a sentence with a period
16.Word-Boundary Pattern Anchors