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)}
  }
}

[download]

Or double your fun with a double-split. 

sub roman_to_dec { reduce { $a+$b-$a%$b*2 }
  @{{split/(\d+)/, 'M1000D500C100L50X10V5I1'}}{split//, uc pop}
}

[download]

Or back to a map... 

sub roman_to_dec { reduce { $a+$b-$a%$b*2 }
  map 'M1000D500C100L50X10V5I1' =~ /$_(\d+)/i, split//, pop
}

[download]

Well, that was fun - thanks

In reply to Re^6: A short whishlist of Perl5 improvements leaping to Perl7 by tybalt89
in thread A short whishlist of Perl5 improvements leaping to Perl7 by rsFalse

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