Learning Perl Objects, References, and Modules
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lexical variables @ISA and closures and 2nd data destruction and defined packages and 2nd reference longevity subroutine references 2nd 3rd libraries alternate installation locations 2nd loading only once search path for licensing like function (Test::More) lists absent import lists qw( ) list 2nd sorted list looping (code structure) 2nd looping (data structure) 2nd
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