PERL Miscellaneous - Re: Slice returned hash or access to its elements without assigning

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Re: Slice returned hash or access to its elements without assigning

Gunnar Hjalmarsson

2005-06-11, 3:57 pm

Andrew wrote:
> There is a sub foo which return hash:
>
> sub foo{my %in=( key1=>value1
> key2=>value2
> key3=>value3);
> }

Would that be the sub? Don't think so. It doesn't even compile, and even
if it had compiled, it would have returned a list rather than a hash.

Subroutines don't return hashes, but they may return references to hashes.

perldoc perlsub

> I need to assess elements of returned hash without assigning to a
> variable. Something like this:
> print @&foo(){'key1','key2'};
> print $&foo(){'key1'};

sub foo {
my %in = ( key1=>'value1', key2=>'value2', key3=>'value3' );
\%in
}

print @{ foo() }{'key1','key2'};

--
Gunnar Hjalmarsson
Email: http://www.gunnar.cc/cgi-bin/contact.pl

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