Nothing
#' @export
getnext.comb <- function(I, d = 1L, drop = d == 1L){
I$last <- I$object$getnext(d, drop = drop)
I$last
}
#' @export
#' @method getlength comb
getlength.comb <- function(I, bigz=FALSE){
if (I$replace){
out <- choose(I$unique_n + I$r - 1, I$r)
}else{
if (I$is.multiset){
out <- nc_multiset(I$f, I$r, TRUE)
}else{
out <- choose(I$n, I$r)
}
}
convert_z(out, bigz)
}
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