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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.
Yes it is. ;-)
And I agree that the push-function should have been called unshift or add.
Wasn't really a fan of this one. The push() function name is misleading, as push() functions normally append to the end of a list, not prepend. Also the instructions for the buildOneTwoThree() function were lacking, figuring out what was being asked/how to impliment felt like a riddle (the answer for me was in the example usage of the push() function ). However, it did feel pretty satisfying once I got it, but I'm sure this a confusing and difficult kata for programmers new to linked lists