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.
I have passed the test case, but when i submit my code, feedback error : expected Bill instead of false.
Why ??
This comment is hidden because it contains spoiler information about the solution
I don't understand these message.
In your description,you say
"return NaN for anything that isn't an actual number."
null is not an actual number!Could you tell me what's the challenge mean?