code: function encodeIntegerish(val, type) {
      var i, arr, buf;
  
      // Get the bytes that we're going to encode.
      arr = intArray(val);
  
      // Now that we know the length, we allocate a buffer of the required size.
      // We set the type and length bytes appropriately.
      buf = new Buffer(2 + arr.length);
      buf[0] = type;
      buf[1] = arr.length;
  
      // Copy the bytes into the array.
      for (i = 0; i < arr.length; i++) {
          buf[i + 2] = arr[i];
      }
  
      return buf;
  }
docs: Encode a simple integer. Integers are encoded as a simple base-256 byte sequence, most significant byte first, prefixed with a length byte. In principle we support arbitrary integer sizes, in practice Javascript doesn't even **have** integers so some precision might get lost.