Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/21142#discussion_r183952708
--- Diff: R/pkg/R/functions.R ---
@@ -206,6 +206,8 @@ NULL
#' df <- createDataFrame(cbind(model = rownames(mtcars), mtcars))
#' 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)))
+#' head(select(tmp, array_min(tmp$v1)))
--- End diff --
let's combine these into one line? I think multiple examples in the pattern
of "head(select(...))" isn't super useful to be honest
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