CODEWITHSUNDEEP
clojure
Attila O.
Attila O.

Reputation: 16615

Clojure unsigned 64-bit integers

How do I define an unsigned long in Clojure? (Or are there arbitrary size integers in the standard library, e.g. some sort of BigInt or BigNum?)

I'd only use it in bitwise operations, so technically the numeric value represented by the binary data is not so important, but I'd still like numbers >263 to be displayed as positive integers when I println them.

Upvotes: 4

Views: 775

Answers (1)

mikera
mikera

Reputation: 106351

I'd suggest just writing a custom function that converts your long into a String with the appropriate unsigned representation.

Something like:

(defn long-str [x] 
     (if (> x 0) 
       (str x)
       (str (+ (bigint x) 18446744073709551616N))))

(long-str -1)
=> "18446744073709551615"

Upvotes: 1

Related Questions