example-2-2.js

function createAverages(metric) {
    for (var i = 1; i < metric.length; i++) {
        metric[i].d1_retention = safeDivide(metric[i].d1_retention, metric[i].DNU) * 100;
        metric[i].d7_retention = safeDivide(metric[i].d7_retention, metric[i].DNU) * 100;
        metric[i].d30_retention = safeDivide(metric[i].d30_retention, metric[i].DNU) * 100;

        metric[i].average_session_length = safeDivide(metric[i].sessions_length, metric[i].sessions) / 60;
        metric[i].average_sessions_per_user = safeDivide(metric[i].sessions, metric[i].DAU);
    }
    return metric;
}