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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.
I think he's referring to the {} after #map.
I'm in Ruby and I'm using #round(2), which should cap it off at 2 decimal places, no?
Despite setting up my rounding parts properly I'm getting some weird outputs on the first test:
Expecting [4.2, -35.8, -2.8, 23.2, 11.2], instead got: [4.200000000000003, -35.8, -2.799999999999997, 23.200000000000003, 11.200000000000003]
Anyone know what's up with that? Every other test passes fine.