Why Koa rox

why_koa_rox.js

module.exports = function(r, logger) {
    return function * create_database(next) {
        yield r.dbDrop("aidax");
        yield r.dbCreate("aidax");
        yield[
            r.tableCreate("clients"),
            r.tableCreate("errors"),
            r.tableCreate("forms"),
            r.tableCreate("hits"),
            r.tableCreate("interactions"),
            r.tableCreate("scrolls"),
            r.tableCreate("sessions"),
            r.tableCreate("timings"),
            r.tableCreate("visitors")
        ];
        yield r.table("clients").insert({
            key: "YOUR_KEY",
            domains: []
        });
        yield next;
    };
};