Date.prototype.setRFC3339 = function(dString){
    var regexp = /(\d\d\d\d)(-)?(\d\d)(-)?(\d\d)(T)?(\d\d)(:)?(\d\d)(:)?(\d\d)(\.\d+)?(Z|([+-])(\d\d)(:)?(\d\d))/;

    if (dString.toString().match(new RegExp(regexp))) {
        var d = dString.match(new RegExp(regexp));
        var offset = 0;

        this.setUTCDate(1);
        this.setUTCFullYear(parseInt(d[1],10));
        this.setUTCMonth(parseInt(d[3],10) - 1);
        this.setUTCDate(parseInt(d[5],10));
        this.setUTCHours(parseInt(d[7],10));
        this.setUTCMinutes(parseInt(d[9],10));
        this.setUTCSeconds(parseInt(d[11],10));
        if (d[12])
            this.setUTCMilliseconds(parseFloat(d[12]) * 1000);
        else
            this.setUTCMilliseconds(0);
        if (d[13] != 'Z') {
            offset = (d[15] * 60) + parseInt(d[17],10);
            offset *= ((d[14] == '-') ? -1 : 1);
            this.setTime(this.getTime() - offset * 60 * 1000);
        }
    } else {
        this.setTime(Date.parse(dString));
    }
    return this;
};

var seenKeys = new Array();

function(doc) {
/*
* em_type of 0 is a student ping
*/

    if (doc.doc_type=="EdoPing" && doc.em_type==0) {
        date = new Date().setRFC3339(doc.created_at);
        var key = doc.em_uname + String(doc.created_at).substring(0,10);
        if (seenKeys[key] ==  undefined  ) {
            seenKeys[key] = 1;
            emit([date.getFullYear(), parseInt(date.getMonth())+1,  date.getDate() ] , 1);
         }  
    }
}


/* ------------------------ */

_count()