Creating implementation for idiom 310 : Fill array with random bytes

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# 310 Fill array with random bytes

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Fill the byte array a with randomly generated bytes.

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use, intrinsic:: iso_fortran_env, only: int8

  real, dimension(100) :: b
  integer(int8), dimension(100) :: a
  call random_number(b)
  a = b*256 - 128

import "crypto/rand"

_, err := rand.Read(a)

import java.util.Random;

new Random().nextBytes(a);

for b in a do b := random(256);

use Bytes::Random;

my $s = random_bytes( $number_of_bytes );
my @a = split //, $s;

my $n = 20;

my $bytestring;
foreach my $i (0 .. $n*8 - 1) {
    vec($bytestring, $i, 1) = rand(2);
}

import random

a[:] = random.randbytes(len(a))

import random

a = random.randbytes(N)

require 'securerandom'

a = SecureRandom.random_bytes(a.length)

use rand::prelude::*;

let mut rng = rand::thread_rng();
rng.fill(&mut a);