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Re^3: More efficient dereferencing of a subroutine return

by frozenwithjoy (Curate)
on Feb 17, 2013 at 23:48 UTC ( #1019239=note: print w/ replies, xml ) Need Help??


in reply to Re^2: More efficient dereferencing of a subroutine return
in thread More efficient dereferencing of a subroutine return

Can you show what exactly gives you that error? I get no errors/warnings with this:

#!/usr/bin/env perl use strict; use warnings; use feature 'say'; my @result = @{ subroutine() }; say "@result"; sub subroutine { my @array = (); return \@array; }


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Re^4: More efficient dereferencing of a subroutine return
by parv (Priest) on Feb 18, 2013 at 00:05 UTC

    Did you, and the one before you, missed the part where I wrote about the case of undef being returned, as in ...

    use strict; my @p = @{ list() }; sub list { return undef; }

    ...?

      That is what you said, but look at the OP's code, its always  return \@array which can never be undef

      an empty array is better than undef

        It seems you and I read the representation of the problem differently. Your reply presumes that every return from sub is always a return of an array reference. (If that promise is made to the user of the sub, then I have no disagreement with direct dereferencing of the return value.) I think of the value returned being an array reference where possible; else, nothing or undef is returned.

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