How to initialize a byte array in Clojure

开发者_开发问答What's the syntax for creating a byte array in Clojure initialized to a specified collection of values?

Something like this, but that works...

(byte-array [0 1 2 3])

(byte-array (map byte [0 1 2 3]))

afaik Clojure has no byte literals.

Other posters have given good answers that work well.

This is just in case you are doing this a lot and want a macro to make your syntax a bit tidier:

(defmacro make-byte-array [bytes] 
  `(byte-array [~@(map (fn[v] (list `byte v)) bytes)]))  

(aget (make-byte-array [1 2 3]) 2)
=> 3

(byte-array [(byte 0x00) (byte 0x01) (byte 0x02) (byte 0x03)])

(byte-array [(byte 0) (byte 1) (byte 2)])

Explanation:

byte creates a byte

byte-array creates a byte[]

bytes converts it to byte[]