Alternative - yes, better - ???
Why use a map - "slices forever !!"
{
my %rtoa = ( M=>1000, D=>500, C=>100, L=>50, X=>10, V=>5, I=>1 );
sub roman_to_dec {
reduce { $a+$b-$a%$b*2 } @rtoa{split//, uc(shift)}
}
}
Or double your fun with a double-split.
sub roman_to_dec { reduce { $a+$b-$a%$b*2 }
@{{split/(\d+)/, 'M1000D500C100L50X10V5I1'}}{split//, uc pop}
}
Or back to a map...
sub roman_to_dec { reduce { $a+$b-$a%$b*2 }
map 'M1000D500C100L50X10V5I1' =~ /$_(\d+)/i, split//, pop
}
Well, that was fun - thanks
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