hash() hashes an arbitrary R object.
The generated hash is guaranteed to be reproducible across platforms, but not across R versions.
hash() uses the XXH128 hash algorithm of the xxHash library, which
generates a 128-bit hash. It is implemented as a streaming hash, which
generates the hash with minimal extra memory usage.
Objects are converted to binary using R's native serialization tools.
On R >= 3.5.0, serialization version 3 is used, otherwise version 2 is used.
serialize() for more information about the serialization version.
hash(c(1, 2, 3))#>  "702f7dd6e81ea41d26ea3b248627ece4"hash(mtcars)#>  "d0487363db4e6cc64fdb740cb6617fc0"