How to get a hash code as integer in R?
That output is a hex (base 16) string. Use following function to change it to decimal. Taken from another forum post but link does not work anymore (2017).
hex_to_int = function(h) {
xx = strsplit(tolower(h), "")[[1L]]
pos = match(xx, c(0L:9L, letters[1L:6L]))
sum((pos - 1L) * 16^(rev(seq_along(xx) - 1)))
}
Output
> hex_to_int(a)
[1] 1302704376
But better answer is strtoi: as @Andrie said and @Gedrox answered, base::strtoi function works in the same way.
strtoi("4da5b0f8", 16)
[1] 1302704376
There is a built in function base::strtoi
:
> strtoi("4da5b0f8", 16)
[1] 1302704376
Since version 0.6.19, digest
has a digest2int
function, though there is no choice of algorithm. The algorithm used is Jenkin's one_at_a_time.
digest::digest2int("key_a")
#> [1] 1414969953