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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.
I tried my solution in IRB and it works flawlessly with multiple data types. I dont know what my attempts keep failing. It keeps returning no method error. But the test passed.
You need to fulfill all the requirements, the first test was just for starters.
There are more tests.
If your solution is incorrect, a message what's wrong is given.