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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.
Not an issue
Duplicate.
Since when is input validation required? ;-)
Also descriptions has been updated
hey, I struggled with this for a while too. First point - look up what thigs are truthy and falsy by default - there are some surprising ones. Second, check into how you are accessing your object properties - there is more than one way and my usual of object.property wasn't the right one to use...
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That would make the kata higher level. This series is aimed at beginners.