dont works

[cesarmarinhorj]

I try example and it don works. Change just class name.

drink_decision_bt.rb:11:in initialize': undefined method cond' for #DrinkDecisionBT:0x00007fced9c393a8 (NoMethodError)

      cond { weekend? },
      ^^^^

any idea? my ruby is : ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x86_64-linux] Thanks!