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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.
u need import
import java.util.Arrays
before class
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We can't really help unless you specify the language.
the
Lockmust be able to store different keys; each key must be verifiably unique (aNumbercan easily be copied)