This was tricky for me because of not fully understanding what grunt expected. When I created my subwayLines array, I used different key names than what grunt was looking for. Even though my logic was all correct, grunt was failing since if couldn't find any of the stations in any of the test cases.
Like I said in the code, nice work on the extra credit. It can help to look over the tests before beginning, in order to avoid annoying errors like the one you experienced
Required tasks + bonus.
This was tricky for me because of not fully understanding what grunt expected. When I created my subwayLines array, I used different key names than what grunt was looking for. Even though my logic was all correct, grunt was failing since if couldn't find any of the stations in any of the test cases.