code: function uint6ToB64 (nUint6) {
  
    return nUint6 < 26 ?
        nUint6 + 65
      : nUint6 < 52 ?
        nUint6 + 71
      : nUint6 < 62 ?
        nUint6 - 4
      : nUint6 === 62 ?
        43
      : nUint6 === 63 ?
        47
      :
        65;
  
  }
docs: /* Base64 string to array encoding