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Re^2: "uninitialized value in subroutine exit" warning from CGI.pm

by dave_the_m (Monsignor)
on Nov 10, 2017 at 09:44 UTC ( [id://1203106]=note: print w/replies, xml ) Need Help??


in reply to Re: "uninitialized value in subroutine exit" warning from CGI.pm
in thread "uninitialized value in subroutine exit" warning from CGI.pm

No idea on WHY the behaviour is different. I'm sure monks with more (perl) guts will come forth.
Args to subs are treated as lvalues (sort of) because they can be modified within the sub, e.g. 
sub f { $_[0] = "abc" }
$s = "1234";
f(substr($s, 0, 1));
# $s is now abc234

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Dave.

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