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Perl in a Nutshell

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Standard Modules
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8.17 B::Showlex

Shows lexical variables used in functions or files. Invoke as:

perl -MO=Showlex[,sub] filename
If sub is provided and is the name of a subroutine in file filename, B::Showlex prints the lexical variables used in that subroutine. Otherwise, it prints the file-scope lexicals in filename.

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