Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/21434#discussion_r191090821
--- Diff: R/pkg/R/functions.R ---
@@ -207,7 +208,7 @@ NULL
#' tmp <- mutate(df, v1 = create_array(df$mpg, df$cyl, df$hp))
#' head(select(tmp, array_contains(tmp$v1, 21), size(tmp$v1)))
#' head(select(tmp, array_max(tmp$v1), array_min(tmp$v1)))
-#' head(select(tmp, array_position(tmp$v1, 21), array_sort(tmp$v1)))
+#' head(select(tmp, array_position(tmp$v1, 21), array_repeat(21, 5L),
array_sort(tmp$v1)))
--- End diff --
also for `5L`, `5` should be ok and more clear as well
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