Low-level functions for hash tables

Low-level functions for hash tables

Usage

hash_table_get_values(h, keys)

hash_table_exists(h, keys)

hash_table_set_values(h, keys, values)

hash_table_delete_pairs(h, keys)

hash_table_size(h)

hash_table_get_all_keys(h)

hash_table_get_all_values(h)

hash_table_clear(h)

hash_table_copy(h)

Arguments

h

A hash_table object.

keys

A character vector of keys.

values

The corresponding values.

Value

• hash_table_get_values() returns a vector of values.

• hash_table_exists() returns a logical vector.

• hash_table_set_values()/hash_table_delete_pairs()/hash_table_clear() directly modifies the input object h.

• hash_table_size() returns a single integer.

• hash_table_get_all_keys() returns a vector of all keys.

• hash_table_get_all_values() returns a vector of all values.

• hash_table_copy() returns a new hash table.

Examples

h = hash_table(c("a", "b"), 1:2L)
hash_table_get_values(h, "a")
#> [1] 1
hash_table_exists(h, c("a", "c"))
#> [1]  TRUE FALSE
hash_table_set_values(h, "a", 100L)
hash_table_get_values(h, "a")
#> [1] 100
hash_table_delete_pairs(h, "a")
h
#> A hash table with 1 key-value (integer) pair
#>   b => 2
hash_table_clear(h)
h
#> A hash table with 0 key-value (integer) pair