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#' Show toc table with multiple packages
#'
#' @param pkgs character vector containing the package names.
#' @param date1,date2 date range to consider (in the format "%Y-%m-%d").
#'
#' @return A `data.frame` with 3 columns:
#' \describe{
#' \item{Version}{The package version number}
#' \item{Published}{The date at which the specific version was published}
#' \item{Package}{The package name}
#' }
#'
#' @seealso [toc()] for the same function for a single package.
#'
#' @examples
#'
#' \dontrun{
#' cross.toc(c("magrittr", "R"))
#' cross.toc(c("magrittr", "rlang"), date1 = "2012-02-01", date2 = "2020-02-01")
#' }
#'
#' @export
#'
cross.toc <- function(pkgs, date1 = "1970-1-1", date2 = Sys.Date()) {
if (is.null(.pkgenv[["cran.toc"]])) {
load.cran.toc(update.toc = FALSE)
}
cran.toc <- .pkgenv[["cran.toc"]]
toc.all <- cran.toc[cran.toc$Package %in% pkgs, c("Version", "Published", "Package")]
toc.all <- toc.all[order(toc.all$Published), ]
# date subset
toc.all <- toc.all[toc.all$Published > date1 & toc.all$Published < date2, ]
rownames(toc.all) <- NULL
return(toc.all)
}
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