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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.
Хитрец.
Thanks, I'm glad you explained this.
the important bit here is that "*" is nothing special in Clojure. It is just a function that happens to be built-in the standard library, but is otherwise a normal Clojure function. You can see it's source there: https://github.com/clojure/clojure/blob/clojure-1.9.0/src/clj/clojure/core.clj#L1000-L1010
Weird language
This actually forced me to expand my knowledge of the language, nice kata!
Does your cache work for functions with any number of arguments?