pubDateToTimestamp()

gistfile1.txt

function pubDateToTimestamp(pubDate) {
    if (typeof pubDate === "number") {
        return pubDate;
    }

    var date = new Date(pubDate);
    var pubDateParsed = Math.round(date.getTime() / 1000);

    if (isNaN(pubDateParsed)) {
        return 0;
    }

    return pubDateParsed;
}