nealrichardson commented on a change in pull request #10269:
URL: https://github.com/apache/arrow/pull/10269#discussion_r638271386
##########
File path: r/R/util.R
##########
@@ -110,3 +110,36 @@ handle_embedded_nul_error <- function(e) {
}
stop(e)
}
+
+#' Take an object of length 1 and repeat it.
+#'
+#' @param object Object of length 1 to be repeated - vector, `Scalar`,
`Array`, or `ChunkedArray`
+#' @param n Number of repetitions
+#'
+#' @return `Array` of length `n`
+#'
+#' @keywords internal
+repeat_value_as_array <- function(object, n) {
+ if (inherits(object, "ChunkedArray")) {
+ return(MakeArrayFromScalar(Scalar$create(object$chunks[[1]]), n))
+ }
+ return(MakeArrayFromScalar(Scalar$create(object), n))
+}
+
+#' Recycle scalar values in a list of arrays
+#'
+#' @param arrays List of arrays
+#' @return List of arrays with any vector/Scalar/Array/ChunkedArray values of
length 1 recycled
+#' @keywords internal
+recycle_scalars <- function(arrays){
+ # Get lengths of items in arrays
+ is_df <- map_lgl(arrays, ~inherits(.x, "data.frame"))
+ arr_lens <- lengths(arrays)
+ arr_lens[is_df] <- map_int(arrays[is_df], nrow)
+
+ if (length(arrays) > 1 && any(arr_lens == 1) && !all(arr_lens==1)) {
+ max_array_len <- max(arr_lens)
+ arrays[arr_lens == 1 & !is_df] <- lapply(arrays[arr_lens == 1 & !is_df],
repeat_value_as_array, max_array_len)
Review comment:
@romainfrancois can you take a look please?
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
