Method concatenating

output/java_guava/1.4.18/Hashing.java:675–684

Returns a hash function which computes its hash code by concatenating the hash codes of the underlying hash functions together. This can be useful if you need to generate hash codes of a specific length. For example, if you need 1024-bit hash codes, you could join two Hashing#sha512 hash

(HashFunction first, HashFunction second, HashFunction... rest)

  public static HashFunction concatenating(HashFunction first, HashFunction second, HashFunction... rest) {
    // We can't use Lists.asList() here because there's no hash->collect dependency
    List<HashFunction> list = new ArrayList<HashFunction>();
    list.add(first);
    list.add(second);
    for (HashFunction hashFunc : rest) {
      list.add(hashFunc);
    }
    return new ConcatenatedHashFunction(list.toArray(new HashFunction[0]));
  }

  /**
   * Returns a hash function which computes its hash code by concatenating the hash codes of the