How can you implement Composite keys in clojure?

How can you implement Composite keys in clojure? If I have a map where First and last name, for example, point to a list of attributes .... Could I make a map that contained bo开发者_如何学运维th fields as the key?

And meanwhile ... In java you can override "equals" to make very advanced keys for maps... How are sophisticated keys implemented in clojure?

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You can use any kind of object that correctly implements equals as a key. For clojure, that includes all the collection types, so you can just use a standard clojure collection as the key. Example using a two-element vectors as keys:

(def foo {[1 2] :bar [3 4] :baz})
=> #'user/foo
(foo [1 2])
=> :bar