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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.
You should respect Kyu rang 8.
Then you displays a validation error until the user types without any errors.
Test is updated
I aggree kitko, those katas teach us how to code stuff like any or all without using those build in methods.
Clever :D
Ruby version is still broken. Saw solution like
a+b+a