Nothing
is_valid <- function(x) {
if (is.null(x)) return(FALSE)
TRUE
}
all_valid <- function(xs) {
ok <- TRUE
for (x in xs) {
if (!is_valid(x)) ok <- FALSE
}
ok
}
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.