reproducible (version 1.2.8)

CacheDigest: The exact digest function that Cache uses

Description

This can be used by a user to pre-test their arguments before running Cache, for example to determine whether there is a cached copy.

Usage

CacheDigest(
  objsToDigest,
  algo = "xxhash64",
  calledFrom = "Cache",
  quick = FALSE,
  ...
)

Value

A list of length 2 with the outputHash, which is the digest that Cache uses for cacheId and also preDigest, which is the digest of each sub-element in objsToDigest.

Arguments

objsToDigest

A list of all the objects (e.g., arguments) to be digested

algo

The algorithms to be used; currently available choices are md5, which is also the default, sha1, crc32, sha256, sha512, xxhash32, xxhash64, murmur32, spookyhash and blake3.

calledFrom

a Character string, length 1, with the function to compare with. Default is "Cache". All other values may not produce robust CacheDigest results.

quick

Logical or character. If TRUE, no disk-based information will be assessed, i.e., only memory content. See Details section about quick in Cache.

...

passed to .robustDigest; this is generally empty except for advanced use.

Examples

if (FALSE) {
  a <- Cache(rnorm, 1)
  CacheDigest(list(rnorm, 1))

}