/usr/share/doc/r-cran-tibble/tests/testthat/helper-unknown-rows.R is in r-cran-tibble 1.4.1-1ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | as_unknown_rows <- function(x) {
x <- as_tibble(x)
class(x) <- c("unknown_rows", class(x))
x
}
dim.unknown_rows <- function(x) {
c(NA_integer_, length(x))
}
registerS3method("dim", "unknown_rows", dim.unknown_rows)
head.unknown_rows <- function(x, n) {
head(as.data.frame(x), n)
}
registerS3method("head", "unknown_rows", head.unknown_rows)
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