store timedref

(store-timedref store id . fback)

store-timedref returns a value from the data store if it is newer than the default timeout, which is 30 seconds.

Parameter	Description
store	The store name
id	The key for which a value is retrieved
fback	Optional: The fallback value to be returned if the id is not found, e.g. '(). If not specified #f is returned.

Example

Example 1: Create a store, set a value and retrieve it both with store-ref and with store-timedref

> (define store (make-store "main"))
> (store-set! store "HR" 78)        
> (set! ##now (+ ##now 31.))  ;; This is a terrible hack to advance the clock on Console
> (store-ref store "HR")
78
> (store-timedref store "HR")
#f