Since Perl 5.8.0 you can open a filehandle for writing to a scalar.
Then, if you make that filehandle the default, writes will go there.
my %hash = (one => 1, two => 2, three => 3);
my $output;
open FH, '>', \$output;
my $old_fh = select(FH);
my $key;
foreach $key (keys %hash) {
write;
}
select ($old_fh);
print $output;
format FH =
@<<<<<<<<< @##
$key, $hash{$key}
.
Content of $output:
three 3
one 1
two 2
Unfortunately, this doesn't seem to work with localized filehandles.
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