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Perl/Basics/Boolean Logic/Helper Natives/Undef
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Revision as of 02:49, 16 July 2012 by AlizaLorenzo (Talk | contribs) (Created page with "The '''undef''' native determines if a '''scalar''' value is un-defined: {{code|text=<source lang="perl"> print "We received a response from the server.\n" unless undef $response...")
