Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/22291#discussion_r214244359
--- Diff: R/pkg/R/generics.R ---
@@ -799,10 +807,18 @@ setGeneric("array_sort", function(x) {
standardGeneric("array_sort") })
#' @name NULL
setGeneric("arrays_overlap", function(x, y) {
standardGeneric("arrays_overlap") })
+#' @rdname column_collection_functions
+#' @name NULL
+setGeneric("array_union", function(x, y) { standardGeneric("array_union")
})
+
#' @rdname column_collection_functions
#' @name NULL
setGeneric("arrays_zip", function(x, ...) { standardGeneric("arrays_zip")
})
+#' @rdname column_collection_functions
+#' @name NULL
+setGeneric("shuffle", function(x) { standardGeneric("shuffle") })
--- End diff --
this should go below - this part of the list should be sorted alphabetically
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