If I'm not misstaken diff should be accessible within the keyf function, due to closures. However, I need to place it within the keyf function for the shell to recognise it. Is this a bug perhaps?

Result without diff within the keyf function:
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> getThanks('summaries', "759df69a-589e-41a2-b316-a6c91a6fe975")
Sun Jul 12 17:40:24 JS Error: uncaught exception:

{"errno" : -3 , "errmsg" : "invoke failed: JS Error: ReferenceError: diff is not defined nofile_b:4" , "ok" : 0}

Result with diff within the keyf function:
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> getThanks('summaries', "759df69a-589e-41a2-b316-a6c91a6fe975")
[

{"day" : 6 , "month" : 4 , "year" : 2009 , "count" : 0}

,

{"day" : 1 , "month" : 5 , "year" : 2009 , "count" : 0}

,

{"day" : 26 , "month" : 5 , "year" : 2009 , "count" : 0}

]

FUNCTION
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function getThanks(collection, id) {

var now = new Date();
var diff = 1000 * 60 * 60 * 24 * 30; // inaccessible

var res = db.group({
ns: collection,
// key:

{description:null}

,
keyf: function(a) {
var date = a.createdAt;
var time = date.getTime();
var now = new Date();
var diff = 1000 * 60 * 60 * 24 * 30; // accessible
// if (now.getTime() - time > diff)

{ // return null; // }

return

{ "day":date.getDate(), "month":date.getMonth(), "year":date.getFullYear() }

;
},
initial:

{count:0}

,
reduce: function(obj, prev)

{ // prev.abc.push(obj); prev.count + obj.thanks.length; }

,
cond:

{"user.$id": id }

,
});
// group() returns an array of grouped items. here, there will be a single
// item, as key is {}.
return res;
}