A way to get reduced group to filter correctly

[tvinci]

I'm using crossfilter to reduce and sort an array which produces key value pairs. However, when I filter it, the values disappears but the key remains. Is there a way to make sure the keys don't show? Here is the code. I've also created a jsfiddle example: http://jsfiddle.net/tvinci/v36Rv/5/

var data2 = [
{date: "10/01/2012", hits: 1, tps: 100, http_status:'s200'},
{date: "10/01/2012", hits: 1, tps: 90, http_status:'s302'},
{date: "01/02/2013", hits: 1, tps: 100, http_status:'s200'},
{date: "01/02/2013", hits: 1, tps: 10, http_status:'s302'},
{date: "01/03/2013", hits: 0, tps: 300, http_status:'s200'},
{date: "01/03/2013", hits: 1, tps: 10, http_status:'s302'},
{date: "01/04/2013", hits: 1, tps: 90, http_status:'s200'},
{date: "01/04/2013", hits: 1, tps: 0, http_status:'s302'},
];
var parseDate = d3.time.format("%m/%d/%Y").parse;
data2.forEach(function(d) {
d.date = parseDate(d.date);
d.Year=d.date.getFullYear();
});

var ndx2 = crossfilter(data2);

var tpsDim = ndx2.dimension(function(d) {return d.date;});
var yearDim = ndx2.dimension(function(d) {return d.Year;});
print_filter("tpsDim");

var tableGroup = tpsDim.group().reduce(
function(p,v) {
p[v.http_status] = (p[v.http_status] || 0) + +v.tps;
p["Year"]=v.Year;
return p;
},
function(p,v) {
p[v.http_status] = (p[v.http_status] || 0) - +v.tps;
p["Year"]=v.Year;
return p;
},
function() { return {}; });

print_filter("tableGroup");
/* This prints the following
"tableGroup(4) = [
{"key":"2013-01-02T05:00:00.000Z","value":{"s200":100,"Year":2013,"s302":10}},
{"key":"2013-01-03T05:00:00.000Z","value":{"s200":300,"Year":2013,"s302":10}},
{"key":"2013-01-04T05:00:00.000Z","value":{"s200":90,"Year":2013,"s302":0}},
{"key":"2012-10-01T04:00:00.000Z","value":{"s200":100,"Year":2012,"s302":90}}
]"
/
var filter_2012= yearDim.filter("2012");
print_filter("filter_2012");
/ This prints the following:
"filter_2012(2) = [
{"date":"2012-10-01T04:00:00.000Z","hits":1,"tps":90,"http_status":"s302","Year":2012},
{"date":"2012-10-01T04:00:00.000Z","hits":1,"tps":100,"http_status":"s200","Year":2012}
]"
/
print_filter("tableGroup");
/ This prints the following. You can see the values are 0 except for year. Even when filtering on the date instead of year, the filter still keeps the key.
"tableGroup(4) = [
{"key":"2013-01-02T05:00:00.000Z","value":{"s200":0,"Year":2013,"s302":0}},
{"key":"2013-01-03T05:00:00.000Z","value":{"s200":0,"Year":2013,"s302":0}},
{"key":"2013-01-04T05:00:00.000Z","value":{"s200":0,"Year":2013,"s302":0}},
{"key":"2012-10-01T04:00:00.000Z","value":{"s200":100,"Year":2012,"s302":90}}
]"

*/

[RandomEtc]

Apologies for silence here. Please ask questions on http://stackoverflow.com/questions/tagged/crossfilter and note that as discussed in #151 an active fork is being developed in a new Crossfilter Organization.