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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.
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This was a very hard kata and very enjoyable to do.
Using some methods can help a lot to finish the solution.
The function name "longest" implies to return the longest of s1 or s2, reinforcing the descriptions task of returning the longest string of distinct letters.
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Im coming from codecademy too.
They dont explain conversions values. This is very sad.
I'd became lost because my last experience knologe is in Python, but in Kotlin many thing is in Functions and Methods.
very hard with no formula