Github user junyangq commented on a diff in the pull request:
https://github.com/apache/spark/pull/14558#discussion_r74172127
--- Diff: R/pkg/R/functions.R ---
@@ -3033,6 +3033,9 @@ setMethod("when", signature(condition = "Column",
value = "ANY"),
#' Evaluates a list of conditions and returns \code{yes} if the conditions
are satisfied.
#' Otherwise \code{no} is returned for unmatched conditions.
#'
+#' @param test a Column expression that describes the condition.
+#' @param yes return values for true elements of test.
--- End diff --
Good catch, thanks!
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