Re^2: More efficient dereferencing of a subroutine return

[parv]

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

Darn thing causes fatal error of Can't use an undefined value as an ARRAY reference if undef is received under strict 'refs', where the dereference result could have been an empty list without the need to invoke no strict ... . I will take the temporary variable to do a check first.

[Anonymous Monk]

what? Can you demonstrate that?

[frozenwithjoy]

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;
}

[parv]

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; }

...?

[Anonymous Monk]

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

[tobyink]

In that case,

my @ARRAY = @{ subroutine() || [] };