Twilio Phone Interview

Tweet Search Engine
        *Navigation bar at top of page - contains links to “Search” and “Insert Tweet”
        Search
                *Can search by word
                *Once query is submitted, return list of all matching tweets
        Insert
                *”Tweets” can be inserted into database

global $db = array();

interface Tweet { content:String }

function save(Tweet $doc) { // String
  $words = explode(“ “, $doc->content);
  foreach ($words as $word)
  {
    if (!isset($db[$word]))
      $db[$word] = array($doc);
    else if (!in_array($doc, $db[word]))
      array_push($db[$word], $doc);
  }
}

$tweet = Tweet(“this this this is a tweet”);
$tweet2 = Tweet(“this is another”);
save($tweet);
save($tweet2);
array(
  “this” => array($tweet, $tweet2)),
  array(“is”, $tweet),
  array(“a”, $tweet),
  array(“tweet”, $tweet),
  array(“this”, $tweet2),
)

function retrieve($keyword) { // String -> [Tweet]
  if (isset($db[$keyword])
    return $db[$keyword];
  else return array();//
}