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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.
Use spoiler flag next time please, your post was visible in the homepage.
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The point was to hand-write a recursive function :)
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please ask a
question(not anissue) to ask for help next time ;-)string indexing with the syntax
string[idx]requires F#6.0+, but in this kata the F# version is4.1; you have to use the syntaxstring.[idx]source
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