code: function stringifyCardCode(code) {
    const rank = code & 0b111100
    const suit = code & 0b000011
    return rankCodeStrings[rank] + suitCodeStrings[suit]
  }
docs: Converts the given card code into a string presentation.
  
  @name stringifyCardCode
  @function
  @param {Number} code the card code, i.e. obtained via `cardCode(rank, suit)`.
  @return {String} a string representation of the card in question, i.e. `Ah`