hashmap: Atomic vector hash map

In hashmap: The Faster Hash Map

Description

Create a new Hashmap instance

Usage

hashmap(keys, values, ...)

Arguments

keys	an atomic vector representing lookup keys
values	an atomic vector of values associated with keys in a pair-wise manner
...	other arguments passed to new when constructing the Hashmap instance

Details

The following atomic vector types are currently supported for keys:

• integer

• numeric

• character

• Date

• POSIXct

The following atomic vector types are currently supported for values:

• logical

• integer

• numeric

• character

• complex

• Date

• POSIXct

Value

a Hashmap object

See Also

Hashmap-class for a more detailed discussion of available methods

Examples

x <- replicate(10e3,
    paste0(sample(letters, 12, TRUE),
           collapse = "")
)
y <- rnorm(length(x))
z <- sample(x, 100)

H <- hashmap(x, y)

all.equal(y[match(z, x)], H[[z]])

## Not run: 
microbenchmark::microbenchmark(
    "R" = y[match(z, x)],
    "H" = H[[z]],
    times = 500L
)

## End(Not run)

hashmap documentation built on May 1, 2019, 10:13 p.m.