Hash an object

hash() hashes an arbitrary R object.

The generated hash is guaranteed to be reproducible across platforms, but not across R versions.

hash(x)

Arguments

x	An object.

Details

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. See serialize() for more information about the serialization version.

Examples

hash(c(1, 2, 3))
#> [1] "702f7dd6e81ea41d26ea3b248627ece4"
hash(mtcars)
#> [1] "d0487363db4e6cc64fdb740cb6617fc0"