These generics are packaged here for methods in packages bit64 and
ff.
is.sorted(x, ...)
is.sorted(x, ...) <- value
na.count(x, ...)
na.count(x, ...) <- value
nvalid(x, ...)
nunique(x, ...)
nunique(x, ...) <- value
nties(x, ...)
nties(x, ...) <- valuesee help of the available methods
see help of the available methods
methods("na.count")
#> [1] na.count.default* na.count.ff*
#> see '?methods' for accessing help and source code