R: Atomic vector hash map

hashmap {hashmap}

R Documentation

Atomic vector 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

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)

[Package hashmap version 0.2.2 Index]