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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.
Thank you Chrono79, that explanation did clarify the challange. I thought at first that I had to combine the elements of the given array.
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Sorry, was my first translation and I'm not that well versed with Ruby, let alone RSpec.
Nevertheless, I was able to add custom error messages that include the list input. Not sure what the best course of action is for the blocks.
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Added random tests to the Ruby translation, please review
I agree, this was way too difficult for Kyu 6. There are Kyu 5 out there, which are significant easier than this here.
The examples suggest that there is only one period to buy and sell, I think another example which displays the behaviour would be preferrable. Not everyone is a native speaker nor that experienced with the english language. They exists in the tests, why not pull one example from there?