Unless you're using Perl 5.8.1 or greater, using map in a void context like that is a bad idea. Even on a relatively recent Perl I still think it's harder to follow than the alternative using "for".

perl -e 'rename ($_, $_-9900) for glob "222*";'

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In reply to Re^2: Mass file renaming by davorg
in thread Mass file renaming by kurisk

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