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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Your function isn't returning.
Not an issue, this is a code question.
Can you provide the error message, that wold help in fixing the issue.
I don't understand this return number? How does it work?
This comment is hidden because it contains spoiler information about the solution
Test.assert_equals(longest("loopingisfunbutdangerous", "lessdangerousthancoding"), "abcdefghilnoprstu")
return contents both 'f' and 'h', but s1 contents only 'f', s2 contents only 'h'
abdefgilnoprstu should be return value (length of string 15 - s1, s2 is length 14, acdeghilnorstu)