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This function returns the default function arguments (if any).
function_defaults(f, exclude = NULL)A named list.
[function]
A function.
[NULL | character()]
Argument names to exclude.
Can be NULL (default) to not exclude any argument names.
Other function helpers:
do.call_timed(),
function_arguments(),
function_body(),
quiet(),
timed(),
try_silent(),
variable_name()
f <- function(a, b = 1, c = "", ...) { }
function_defaults(f)
function_defaults(f, exclude = "b")
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