Loading collection data...
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.
str+=i%2; is much shorter
I don't know about every() method for array
I have this problem:
TypeError: Object [object Generator] has no method 'indexOf' at nextItem
Can anybody suggest why I receive this error?