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Regular Expressions
The Transpose Operator

  • The transpose operator tr may also be applied to a target string using a variant of the pattern matching syntax

      $myString =~ tr/SEARCH/REPLACE/;

  • The effect is that $myString will be modified if any SEARCH characters match

      $myString = "Bat";
      $myString =~ tr/[a-z]/[A-Z]/; # Yields "BAT"