thisisnic commented on code in PR #35055:
URL: https://github.com/apache/arrow/pull/35055#discussion_r1230759929
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r/R/dataset-format.R:
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@@ -113,6 +115,45 @@ ParquetFileFormat$create <- function(...,
#' @export
IpcFileFormat <- R6Class("IpcFileFormat", inherit = FileFormat)
+#' JSON dataset file format
+#'
+#' @description
+#' A `JsonFileFormat` is a [FileFormat] subclass which holds information about
how to
+#' read and parse the files included in a JSON `Dataset`.
+#'
+#' @section Factory:
+#' `JsonFileFormat$create()` can take options in the form of lists passed
through as `parse_options`,
+#' or `read_options` parameters.
+#'
+#' Available `read_options` parameters:
+#' * `use_threads`: Whether to use the global CPU thread pool. Default
`TRUE`. If `FALSE`, JSON input must end with an
+#' empty line.
+#' * `block_size`: Block size we request from the IO layer; also determines
size of chunks when `use_threads`
+#' is `TRUE`.
Review Comment:
I have no idea; I copied from
https://github.com/apache/arrow/blob/95972cca1f65179b63a9fe5262d1092547e3d137/r/R/csv.R#L378-L384
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