Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/13760#discussion_r68540924
--- Diff: R/pkg/R/DataFrame.R ---
@@ -1370,14 +1370,22 @@ setMethod("dapplyCollect",
#' columns with data types integer and string and the mean which is a
double.
#' schema <- structType(structField("a", "integer"), structField("c",
"string"),
#' structField("avg", "double"))
-#' df1 <- gapply(
+#' result <- gapply(
--- End diff --
if what is returned is a DataFrame it might help to keep it a variant of
"df"
in fact, you might want to add `@return` to document to return value and
type
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