最大で22の要素を突っ込めるとか
$ scala
Welcome to Scala version 2.10.3 (Java HotSpot(TM) 64-Bit Server VM, Java 1.7.0_51).
Type in expressions to have them evaluated.
Type :help for more information.
scala> val t1 = ("Scala", 10)
t1: (String, Int) = (Scala,10)
scala>
scala> t1._1
res1: String = Scala
scala> t1._2
res2: Int = 10
scala> t1._3
<console>:9: error: value _3 is not a member of (String, Int)
t1._3
^
scala>
