code: function doOnlySecond(what, first, second, func) {
    const kErr = -1;
  
    for (let data of second) {
      if (first.indexOf(data) === kErr) {
        func.call(what, data);
      }
    }
    return first;
  }
docs: what: 関数を実行するthis; first, second : Array; func :Function;