memoise (version 0.1)

memoize: Memoise a function.

Description

Memoise a function.

Usage

memoize(f)

Arguments

f

function to memoise

See Also

http://en.wikipedia.org/wiki/Memoization

Examples

a <- function(x) runif(1)
replicate(10, a())
b <- memoise(a)
replicate(10, b())

c <- memoise(function(x) { Sys.sleep(1); runif(1) })
system.time(print(c()))
system.time(print(c()))
forget(c)
system.time(print(c()))