Github user yu-iskw commented on a diff in the pull request:
https://github.com/apache/spark/pull/8266#discussion_r37372853
--- Diff: R/pkg/R/functions.R ---
@@ -163,3 +163,17 @@ setMethod("n", signature(x = "Column"),
function(x) {
count(x)
})
+
+#' when
+#'
+#' Evaluates a list of conditions and returns one of multiple possible
result expressions.
--- End diff --
The comments of `when` is same as that of `otherwise` in Scala. As you're
suggesting, it would be better to explain the difference. Hmm, do you have any
good idea?
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