Sequences, Type Inference, and Inheritance... I am slightly lost.

[TokenChingy]

That actually makes sense. I just also worked out (just before reading your 
reply) that explicitly converting the first element to the `Resource` type:
    
    
    var app = Application(
      resources: @[(Resource)food]
    )
    
    
    Run

Thanks for the help! It actually totally makes sense now!