$db = Flat::localDatabase("/path/to/db");

$doc = new Document([
    'title' => 'Flat',
    'description' => 'A flat NoSQL database',
]);

$db->collection('pages')->insert($doc);

$db->collection('pages')->find(['published' => true]);

// Something slightly more complex
$db->collection('pages')->find([
    'published' => true,
    'view_count' => [ '$gt' => 1000 ],
    'author' => ['$in' => [ 'john', 'jane', 'jack']]
]);

// Or with boolean combination
$db->collection('pages')->find([
    '$or' => [
        ['published' => false],
        ['author' => 'admin']
    ]
]);

$db->collection('pages')->remove(['published' => false]);