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clojure

Clojure can a list be identical to a vector

In REPL, when you input

(= [1 2 3] (list 1 2 3))

You'll get a true. Does it mean that a list can be identical with a vector?

Solution

  • No, a clojure.lang.PersistentList can never be identical? to a clojure.lang.IPersistentVector -- they are different types, and obviously objects of different types can not be the same object. Therefore they can not be identical.

    They can, however, be equal. = in Clojure checks equality, not identity, and calls the equals method that every Object has in Java. Both lists and vectors implement equals by determining whether the contents of the list/vector are equal to the contents of the other collection (if the other object is not a collection, it will return false).