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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 fails with "something-that-ends-with-www.com"
"testwww.com" => "testcom"
Any further information? Have you tried it again afterwards, maybe just a server issue?
Else try optimizing your code.
This comment is hidden because it contains spoiler information about the solution
This comment is hidden because it contains spoiler information about the solution
Prime numbers == natural numbers == positive numbers :)