4 ms·

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

by jotto 17y ago

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