# as.function

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##### Convert Object to Function

as.function is a generic function which is used to convert objects to functions.

as.function.default works on a list x, which should contain the concatenation of a formal argument list and an expression or an object of mode "call" which will become the function body. The function will be defined in a specified environment, by default that of the caller.

Keywords
programming
##### Usage
as.function(x, ...)
"as.function"(x, envir = parent.frame(), ...)
##### Arguments
x
object to convert, a list for the default method.
...
envir
environment in which the function should be defined
##### Value

The desired function.

##### Note

For ancient historical reasons, envir = NULL uses the global environment rather than the base environment. Please use envir = globalenv() instead if this is what you want, as the special handling of NULL may change in a future release.

function; alist which is handy for the construction of argument lists, etc.
library(base) as.function(alist(a = , b = 2, a+b)) as.function(alist(a = , b = 2, a+b))(3)