app/assets/javascripts/models/range.js.coffee
class F.Models.Range
constructor: (@_from, @_to) ->
from: ->
@_from || @_to
to: ->
@_to || @_from
toString: ->
"#{Format.date_to_s(@from())}_#{Format.date_to_s(@to())}"
F.Models.Range.fromString = (str) ->
new F.Models.Range(Parse.date_to_s(str.split("_")[0]), Parse.date_to_s(str.split("_")[1]))