Perhaps consider this:
Updated code to be perhaps more helpful...
I think an issue here that when you "say", you have to say what you want to "say"!
use strict;
use warnings;
use Data::Dumper;
use v5.10;
sub f {a=>1,b=>2}
my %result = f(); #converts a a hash passed as an arry
#back into a hash
print Dumper \%result;
print "to print just the keys of the hash:\n";
say "$_" for keys %result;
# this is much faster, execution wise...
# passes back a referecne to a hash that has
# been already been created.
sub x
{
my %result;
$result{a}=1; #more likely way to set the results
$result{b}=2;
return \%result;
}
my $hash_ref = x();
print "to print the keys of this hash\n";
print "$_\n" for keys (%$hash_ref);
print Dumper $hash_ref;
__END__
$VAR1 = {
'b' => 2,
'a' => 1
};
to print just the keys of the hash:
b
a
to print the keys of this hash
a
b
$VAR1 = {
'a' => 1,
'b' => 2
};
PS: I did find that say for keys %{{f}}; did indeed work.
I didn't expect that result, but it does "work".
I find say "$_" for keys %{{f}}; to be easier to understand.
However, Perl is gonna make a hash from the return value of f() whether or not you give it name. I prefer the above syntax.
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