| is.function {base} | R Documentation |
Is an Object of Type (Primitive) Function?
Description
Checks whether its argument is a (primitive) function.
Usage
is.function(x)
is.primitive(x)
Arguments
x |
an R object. |
Details
is.primitive(x) tests if x is a primitive function
(either a "builtin" or "special" as described for
typeof)?
Value
TRUE if x is a (primitive) function, and FALSE
otherwise.
Examples
is.function(1) # FALSE
is.function(is.primitive) # TRUE: it is a function, but ..
is.primitive(is.primitive) # FALSE:it's not a primitive one, whereas
is.primitive(is.function) # TRUE: that one *is*