Simple in-memory caching. Defaults to 2s

simple-memory-caching.coffee

# Simple in-memory caching. Defaults to 2s
# http://jsperf.com/date-now-vs-new-date-gettime/4

store = {}

cache = {}

cache.set = (key, value, milliseconds) ->
  if not store[key]?
    store[key] = value
    setTimeout () ->
      delete store[key]
    , Date.now() + (milliseconds or 2000)

cache.get = (key) ->
  store[key] or null

cache.flush = ->
  store = {}

cache.size = ->
  Object.keys(store).length

exports = module.exports = cache