"Ruby Metaprogramming PDF Beta Book".discount(21.00, 0.40) | Hacker News Reader

"Ruby Metaprogramming PDF Beta Book".discount(21.00, 0.40)

dealzon.com

3 pointsjotto1 comment

String.send('define_method', :discount, lambda{ |args| "#{self} = $#{(args.first(1.0-args.last))} (#{args.last*100}% off)" })

  String.send('define_method', :discount, lambda{ |*args| "#{self} = $#{(args.first*(1.0-args.last))} (#{args.last*100}% off)" })