Twitter's Recommendation Algorithm
From <a href="https://github.com/twitter/the-algorithm/blob/7f90d0ca342b928b479b512ec51ac2c3821f5922/home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/HomeTweetTypePredicates.scala#L225">https://github.com/twitter/the-algorithm/blob/7f90d0ca342b92...</a><p><pre><code>    (
      "author_is_elon",
      candidate =>
        candidate
          .getOrElse(AuthorIdFeature, None).contains(candidate.getOrElse(DDGStatsElonFeature, 0L))),
    (
      "author_is_power_user",
      candidate =>
        candidate
          .getOrElse(AuthorIdFeature, None)
          .exists(candidate.getOrElse(DDGStatsVitsFeature, Set.empty[Long]).contains)),
    (
      "author_is_democrat",
      candidate =>
        candidate
          .getOrElse(AuthorIdFeature, None)
          .exists(candidate.getOrElse(DDGStatsDemocratsFeature, Set.empty[Long]).contains)),
    (
      "author_is_republican",
      candidate =>
        candidate
          .getOrElse(AuthorIdFeature, None)
          .exists(candidate.getOrElse(DDGStatsRepublicansFeature, Set.empty[Long]).contains)),
    )</code></pre>