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• $, the output field separator, and $" the list separator of Perl

• How to extract strings from a file

• Installing and getting started with Perl

• Scalar values and variables - video

• Scalar variables

• $_ the default variable of Perl

• $UID

• $:

• Methods, Functions and Subroutines in Perl and what is $self ?

• $LIST_SEPARATOR

• $ACCUMULATOR

• $$

• $PREMATCH

• $BASETIME

• $^

• ${^GLOBAL_PHASE}

• $^O

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• $^P

• $SUBSCRIPT_SEPARATOR