CODEWITHSUNDEEP
r
Tomas
Tomas

Reputation: 59597

How to test if particular function has argument of given name?

How to test in R if particular function has argument of given name?

An illustration of what I need:

f <- function (a, b, c)
{
    1
}

fun_iam_lookin_for(f, "b") # should return TRUE
fun_iam_lookin_for(f, "d") # should return FALSE

Upvotes: 0

Views: 83

Answers (1)

Allan Cameron
Allan Cameron

Reputation: 174606

You could try:

f <- function (a, b, c)
{
    1
}

fun_iam_lookin_for <- function(f, x) x %in% names(formals(f))
fun_iam_lookin_for(f, "b") # should return TRUE
#> [1] TRUE
fun_iam_lookin_for(f, "d") # should return FALSE
#> [1] FALSE

Created on 2020-05-06 by the reprex package (v0.3.0)

Upvotes: 1

Related Questions