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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.
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Same with Kotlin
Its just too good
kolo da£ rade
In "Java™ Platform, Standard Edition 8 API Specification" docs, search "uanry" or "function", it may help you a lot.
The dots simply mean that you have something to complete (oper has functions as first parameter). You can google something like : "Java functions as parameter" or "Java unary, binary operators".
shh, all people will know it, :)
shh bby
Thanks for your encouragement!