asynchronous.js

var fa = require('fa');

function clear_db(client) {
    console.log("In clear_db");

    client.hkeys("tug", function(err, replies) {
        if (err) {
            return console.error("error response - " + err);
        }

        console.log(replies.length + " replies:");
        fa.with_index().each(replies, function(name, i, cb) {
            console.log("    " + i + ": " + name);
            client.hget("tug", name, function(err, val) {
                console.log("key " + name + " is " + val);
                cb();
            });
        }, function(err) {
            console.log('Done');
            client.quit();
        });
    });
}

original.js

function clear_db(client) {
    console.log("In clear_db");

    client.hkeys("tug", function(err, replies) {
        if (err) {
            return console.error("error response - " + err);
        }

        console.log(replies.length + " replies:");
        replies.forEach(function(name, i) {
            console.log("    " + i + ": " + name);
            client.hget("tug", name, function(err, val) {
                console.log("key " + name + " is " + val);
            });
        });
    });
}

simplified.js

function clear_db(client, callback) {
    client.hgetall('tug', function(err, obj) {
        console.log("Result: ", obj);
        client.quit();
        callback();
    });
}