Question

Has anyone done the anyCommonElements problem in codingBat and have any hints on how to start it?

Answer 1

So Professor Stonedahl recommended to use the Collections.disjoint method in this problem. In order to use that method, you first have to turn the String Arrays into a collection. Going that route will make the problem much easier.

Answer 2

This might help: https://www.geeksforgeeks.org/java-util-collections-disjoint-method-java-examples/

Of course, there are other ways to solve it too...

Comments

The second example on that page is helpful if you are unsure how to turn the String Arrays into a collection.

Answer 3

Another hint: the Collections.disjoint method doesn't work for array type

Comments

There should be a method in ArrayList class called asList which can help converting an array into a list

Answer 4

You will see in the hint that if you want to use Collections.disjoint() method, you will need to create an arraylist first. Therefore, you need to create 2 arraylists and move all the number from 2 array to new arraylists. Then use Collections.disjoint() to complete this problem.