gistfile1.txt

client.keys("*", function(err, keys) {
    if (err) throw err;

    console.log(keys); // OK

    var response = [];

    for (var i = 0; i < keys.length; i++) {
        client.hget(keys[i], "count", function(err, value) {
            if (err) throw err;

            console.log( keys[i] +": "+ value); // undefined: value

            response.push({ key: keys[i], count: value });
        });

    }
}

writer

var parsed = ["test1", "test2" ... "test0921309"];
for (var i = 0; i < parsed.length; i++) {
    client.hincrby(parsed[i], "count", 1);
}