Get keys from an object

Extracts the keys from a map object.

keys(obj)

# S4 method for bimap
keys(obj)

# S4 method for unordered_map
keys(obj)

Arguments

obj	object to extract keys from

Value

returns the extracted keys as vector

Examples

 # returns the keys of a hashmap
 h_map <- hashmap("numeric")
 h_map[rnorm(3)] <- list(1, 2, 3)
 keys(h_map)
#> [1] 0.1943924 1.4505432 0.4212304

 # returns the keys of a multimap
 m_map <- multimap("numeric")
 m_map[c(1, 2, 1)] <- list(rnorm(1), rgamma(1, 1), rexp(1))
 keys(m_map)
#> [1] 2 1 1