findAll

• counties.findAll(<hashkey>) ⇒ promise
• counties.findAll(<hashkey>, <callback>)

Use: Find items in a table with a range key via the hash key. That is find all the items in a table associated with a hash key.

counties
    .findAll('Virginia')
    .then(function(counties) {
        counties.forEach(console.log);
    });

Rather than using the promise, you can use a traditional node callback

counties.findAll('Virginia', function(err, counties) {
    if (err) {
        // Handle error
    } else {
        counties.forEach(console.log);
    }
});