hash arbitrary string to integer

Description

The digest2int function calculates integer hash of an arbitrary string. This is useful for randomized experiments, feature hashing, etc.

Usage

digest2int(x, seed = 0L)

Arguments

x An arbitrary character vector.

seed an integer for algorithm initial state. Function will produce different hashes for same input and different seed values.

Value

The digest2int function returns integer vector of the same length as input vector x.

Author(s)

Dmitriy Selivanov selivanov.dmitriy@gmail.com for the R interface; Bob Jenkins for original implementation http://www.burtleburtle.net/bob/hash/doobs.html

References

Jenkins’s one_at_a_time hash: https://en.wikipedia.org/wiki/Jenkins_hash_function#one_at_a_time.

Examples

library("digest")


current <- digest2int("The quick brown fox jumps over the lazy dog", 0L)
target <- 1369346549L
stopifnot(identical(target, current))