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.
There are no random tests.
This formula is wrong; the denominator should be
sqrt((n00 + n01) * (n10 + n11) * (n00 + n10) * (n01 + n11))
.This problem has been copied from Eloquent Javascript which is licensed under Creative Commons attribution-noncommercial license.
In which it is clearly mentioned:
So you've to give the credit in the description.