Since the weapon names don't seem to matter, only their attributes,
I think it's simpler to iterate over the values of the
weapons hash per Cristoforo's approach. This works
with map, but I think it's even simpler (and IMHO clearer) to use
for-loops:
Win8 Strawberry 5.8.9.5 (32) Sun 12/27/2020 5:07:00
C:\@Work\Perl\monks
>perl -Mstrict -Mwarnings -l
use Data::Dumper;
my $weapons_ref = {
dagger => { cost => 8, damage => 4, armor => 0, },
shortsword => { cost => 10, damage => 5, armor => 0, },
warhammer => { cost => 25, damage => 6, armor => 0, },
longsword => { cost => 40, damage => 7, armor => 0, },
greataxe => { cost => 74, damage => 8, armor => 0, },
};
my $sum_result;
my @sum_fields = qw/cost damage armor/;
# map { # works
# my $attrib = $_;
# map { $sum_result->{$_} += $attrib->{$_} } @sum_fields
# } values %$weapons_ref;
for my $hr_attrib (values %$weapons_ref) {
$sum_result->{$_} += $hr_attrib->{$_} for @sum_fields;
}
print Dumper $sum_result;
^Z
$VAR1 = {
'cost' => 157,
'damage' => 30,
'armor' => 0
};
Give a man a fish: <%-{-{-{-<
