Map Has Duplicate Values

Geoffrey Challen // 2021.9.0

Write a method hasDuplicateValues that, given a Map<String, String>, returns true if the map contains duplicate values—meaning that two different keys map to the same value—and false otherwise. Recall that a map can never contain duplicate keys, since the second mapping from the same key overwrites the first.

You should use a Set to solve this problem! And as usual, maps, sets, and lists are all built-in to Kotlin and available for you to use to solve this problem.