Perl Skills Test

Copyright 2002,2003 A.P. Lawrence

Answers

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Answer

Don't provide aliases for regex variables like $&, $` and $'

Although the English module can provide aliases like $PREMATCH, $MATCH, and $POSTMATCH, the documentation warns to use -no-match-vars:

This module can provoke sizeable inefficiencies for regular
expressions, due to unfortunate implementation details. If performance
matters in your application and you don't need $PREMATCH, $MATCH,
or $POSTMATCH [use -no-match-vars]

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