Number.prototype.formatMoney = (places, symbol, thousand, decimal) ->
  places = if not isNaN(places = Math.abs(places)) then places else 2
  symbol = if symbol isnt undefined then symbol else "$"
  thousand = thousand or ","
  decimal = decimal or "."
  number = @
  negative = if number < 0 then "-" else ""
  i = parseInt(number = Math.abs(+number or 0).toFixed(places), 10) + ""
  j = if (j = i.length) > 3 then j % 3 else 0
  symbol + negative + (if j then i.substr(0, j) + thousand else "") + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + thousand) + (if places then decimal + Math.abs(number - i).toFixed(places).slice(2) else "")
  
module.exports = (money) ->
  money.formatMoney 2, '￥'