Query keys from an hash table.

Source: R/generics.R, R/hashmap.R, R/hashset.R

These generics are used for querying a single key from an hashset or hashmap, respectively. For vectorized queries, see the subsetting_hashtables documentation page.

query(x, key)

# S3 method for r2r_hashmap
query(x, key)

# S3 method for r2r_hashset
query(x, key)

Arguments

x

an hashset or hashmap.
key

an arbitrary R object. Key to be queried from the hash table.

Value

TRUE or FALSE, for hashsets. For hashmaps, if the queried key exists in the hash table, returns the associated value (an a priori arbitrary R object); otherwise, behaves as specified by on_missing_key(x) (see also hashtable).

Author

Valerio Gherardi

Examples

s <- hashset(1, 2, 3)
query(s, 3)

#> [1] TRUE