byte arrays seems to be immutably zeroed  #516

Hey,

While attempting to work with byte arrays, I tried creating one using (byte-array [1 2 3]), however, all I got in return was (into [] (byte-array [1 2 3])) => [0 0 0]. I checked out the code, and it seems to only provide a way to examine byte-arrays (aka nth), but no way to mutate them, or preferably, create them with any meaningful values.

Was I doing something wrong, or is this a real issue?

Thanks!