Extract the cache id of an object

Any object that was returned from the Cache or was calculated as part of a Cache call will have an attribute, tags and an entry with cacheId: prefix. This is a lightweight helper to extract that cacheId.

cacheId(obj)

Arguments

obj

Any R object

Value

The cacheId if this was part of a Cache call. Otherwise NULL

Examples

# An object that was never Cached has no cacheId
cacheId(1:10)
#> NULL