class Tryouts

def find_tryout(name, dtype=nil)

+dtype+ if specified. Returns a Tryout object or nil.
Find matching Tryout objects by +name+ and filter by 
def find_tryout(name, dtype=nil)
  by_name = @tryouts.values.select { |t| t.name == name }
  by_name = by_name.select { |t| t.dtype == dtype } if dtype
  by_name.first  # by_name is an Array. We just want the Object. 
end