Category:List::Util
Library
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This is an example of a library. You may see a list of other libraries used on Rosetta Code at Category:Solutions by Library.
a selection of subroutines that people have expressed would be nice to have in the Perl core, but the usage would not really be high enough to warrant the use of a keyword, and the size so small such that being individual extensions would be wasteful.
Consult the relevant CPAN page.
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