easyr (version 0.5-11)

cache.ok: Check Cache Status

Description

Check a cache and if necessary clear it to trigger a re-cache.

Usage

cache.ok(cache.num, do.load = TRUE)

Value

Boolean indicating if the cache is acceptable. FALSE indicates the cache doesn't exist or is invalid so code should be run again.

Arguments

cache.num

The index/number for the cache we are checking in the cache.info list.

do.load

Load the cache if it is found.

Examples

# check the first cache to see if it exists and dependent files haven't changed.
# if this is TRUE, code in brackets will get skipped and the cache will be loaded instead.
# set do.load = FALSE if you have multiple files that build a cache, 
#    to prevent multiple cache loads.
# output will be printed to the console to tell you if the cache was loaded or re-built.
if (FALSE) {
  if( ! cache.ok(1) ){

    # do stuff
  
    # if this is the final file for this cache, 
    #   end with save.cache to save passed objects as a cache.
    save.cache(iris)
  }
}