UseCase_FoodDelivery_RubySDK_get_itemsim_top_n.rb

# You need to specify the name of the engine from which you want to retrieve the prediction results. 
# When a user views a meal, you can suggest similar meals to the user by adding the following:  
begin
  # retreive top 5 similar courses from the item similarity engine
  iids = client.get_itemsim_top_n("the engine name", "the viewed meal ID", 5) # list of recommended meal IDs
rescue ItemSimNotFoundError => e
  iids = get_default_iids_list(5) # default behavior when there is no prediction results, e.g. recommends newest meals
  log_error(e) # log the error for debugging or analysis later
end

display_meals(iids) # display meals to the user