Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/7203#discussion_r33842222
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/UDFRegistration.scala ---
@@ -87,6 +87,7 @@ class UDFRegistration private[sql] (sqlContext:
SQLContext) extends Logging {
(0 to 22).map { x =>
val types = (1 to x).foldRight("RT")((i, s) => {s"A$i, $s"})
val typeTags = (1 to x).map(i => s"A${i}: TypeTag").foldLeft("RT:
TypeTag")(_ + ", " + _)
+ val inputTypes = (1 to x).foldLeft("Nil")((s, i) => {s"$s :+
ScalaReflection.schemaFor[A$i].dataType"})
--- End diff --
I think the convention is usually
```scala
a :: b :: c :: Nil
```
rather than
```scala
Nil :+ a :+ ...
```
Do you mind updating it?
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