This is intended to be used within the Cache function, but can be used to evaluate what a simList would look like once it is converted to a repeatably digestible object.

# S4 method for simList
.robustDigest(object, .objects, length, algo, quick, classOptions)

Arguments

object

an object to digest.

.objects

Character vector of objects to be digested. This is only applicable if there is a list, environment (or similar) with named objects within it. Only this/these objects will be considered for caching, i.e., only use a subset of the list, environment or similar objects. In the case of nested list-type objects, this will only be applied outermost first.

length

Numeric. If the element passed to Cache is a Path class object (from e.g., asPath(filename)) or it is a Raster with file-backing, then this will be passed to digest::digest, essentially limiting the number of bytes to digest (for speed). This will only be used if quick = FALSE. Default is getOption("reproducible.length"), which is set to Inf.

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.

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.

classOptions

Optional list. This will pass into .robustDigest for specific classes. Should be options that the .robustDigest knows what to do with.

Details

See robustDigest. This method strips out stuff from a simList class object that would make it otherwise not reproducibly digestible between sessions, operating systems, or machines. This will likely still not allow identical digest results across R versions.

See also

robustDigest

Author

Eliot McIntire