# map / reduce
        mapFunc = () ->
            days= ['Sun','Mon','Tue','Wed','Thu','Fri','Sat']
            now = new Date().valueOf()
            key = "#{this.ts.getFullYear()}-#{this.ts.getMonth()+1}-#{this.ts.getDate()}"
            for i in [-9..0]
                date = new Date(now + i*86400000)
                formatted = "#{date.getFullYear()}-#{date.getMonth()+1}-#{date.getDate()}"
                if formatted is key then emit(formatted, {count: 1, day: days[date.getDay()]})
                else emit(formatted, {count: 0, day: days[date.getDay()]})
        reduceFunc = (key, values) ->
            total = 0
            for value in values
                total += value.count
                day = value.day
            return { count: total, day: day }

# query

query = {to:channel}
params = { out: {inline:1}, query: query, sort: {ts:-1} }

# result

[ { _id: '2012-1-1', value: { count: 0, day: 'Sun' } },
  { _id: '2012-1-10', value: { count: 3, day: 'Tue' } },
  { _id: '2012-1-2', value: { count: 0, day: 'Mon' } },
  { _id: '2012-1-3', value: { count: 0, day: 'Tue' } },
  { _id: '2012-1-4', value: { count: 3, day: 'Wed' } },
  { _id: '2012-1-5', value: { count: 1, day: 'Thu' } },
  { _id: '2012-1-6', value: { count: 1, day: 'Fri' } },
  { _id: '2012-1-7', value: { count: 0, day: 'Sat' } },
  { _id: '2012-1-8', value: { count: 1, day: 'Sun' } },
  { _id: '2012-1-9', value: { count: 0, day: 'Mon' } } ]