is_null_or_na {envnames} | R Documentation |
This function silently handles special cases for which is.null() and is.na() may return a warning, such as functions objects or environments. (e.g. the warning "Warning message: In is.na(g) : is.na() applied to non-(list or vector) of type 'closure')"
is_null_or_na(x)
x |
object to check. |
boolean indicating whether the object is NULL or NA. FALSE is returned if the object does not exist.