An integer vector or a character vector where all elements are unique.
cl
One of "integer" and "character".
Value
A hash_set object.
Examples
hash_set(letters)#> A hash set with 26 keys (character)hash_set(1:10)#> A hash set with 10 keys (integer)hash_set_empty("integer")#> A hash set with 0 key (integer)hash_set_empty("character")#> A hash set with 0 key (character)