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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.
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Maybe x was 0?
No, it should not expect an argument. Please read more about prototype functions.
Not an issue, don't you know javascript methods that take no arguments? Read more then, this one for instance. In this kata you have to extend the
String.prototype
.