lapply <- function (X, FUN, ...)
{
    FUN <- match.fun(FUN)
    ## internal code handles all vector types, including expressions
    ## However, it would be OK to have attributes which is.vector
    ## disallows.
    if(!is.vector(X) || is.object(X)) X <- as.list(X)
    .Internal(lapply(X, FUN))
}

rapply <-
    function(object, f, classes = "ANY", deflt = NULL,
             how = c("unlist", "replace", "list"), ...)
{
    if(typeof(object) != "list")
        stop("'object' must be a list")
    how <- match.arg(how)
    res <- .Internal(rapply(object, f, classes, deflt, how))
    if(how == "unlist") unlist(res, recursive = TRUE) else res
}