Nothing
test_that("cross_join", {
tab = cross_join(list(a = 1:3, b = 1:2))
expect_equal(tab, CJ(a = 1:3, b = 1:2))
tab = cross_join(list(sorted = 1:3, b = 1:2))
expect_equal(tab, setnames(CJ(a = 1:3, b = 1:2), "a", "sorted"))
tab = cross_join(list(unique = 1:3, b = 1:2))
expect_equal(tab, setnames(CJ(a = 1:3, b = 1:2), "a", "unique"))
})
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.