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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.
It also fails for
'1.2.3.4.z'This kata (javascript) has way too few tests. Far too many incorrect solutions are being submitted.
Yes, except your variables are not declared locally. Also, there is no need to javascript-escape $...
'\$' === '$'why not just
filter(x => !set.has(x))num / 2? why? do you meansqrt(num)?