gistfile1.coffee

class Storage
  constructor: ->
    @init()

  init: ->
    @table = {}
    @keys = []
    @length = 0

  clear: ->
    @init()
    undefined

  getItem: (key) ->
    key = key.toString()
    if @table[key]? then @table[key] else null

  key: (n) ->
    if @keys[n]? then @keys[n] else null

  removeItem: (key) ->
    key = key.toString()
    if @table[key]?
      delete @table[key]
      index = @keys.indexOf(key)
      @keys[index..index] = []
      @length--

    undefined

  setItem: (key, value) ->
    key = key.toString()
    @keys.unshift(key) unless @table[key]?
    @table[key] = value
    @length++
    undefined