Hello Kotlin experts, I am trying to obtain the result from a

flatMap -> comparator

. please see the gist at https://gist.github.com/visakha/8ac7f823e02192beb23a3f869fc4a196

So, what is your question? Do you have some problem with that code? Or do you want to know, how to make it more idiomatic in Kotlin?

@ilya.gorbunov I want to have this side effect of updating the reason4Pick attribute, so I can run the jUnit assert

If

maxRating

is a Car, could you just set its

reasonForPick

before returing?

yes it should be called maxRatingOrLowerMileage, that name would be more approp for that val, however, how could I know if maxRating or lowerMileage was the reason

Oh, you can check if there are several items with the same max rating. If there're more than one, then the decision was made based on mileage.

if (v1.count { it.rating == maxRating.rating } > 1)

Thank you, I will check that, but since I have about 70% java projects and 30%Kotlin projects, I am trying to stick with Java 8 streams std lib, so the knowledge is transferable between.