Scala 将 Iterable 或 collection.Seq 转换为 collection.immutable.Seq
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Scala convert Iterable or collection.Seq to collection.immutable.Seq
提问by Richard Todd
It appears the toSeqmethod in Scala collections returns a scala.collection.Seq, I could also return a Traversableor Iterablebut need to convert this to a scala.collection.immutable.Seq.
看来toSeqScala 集合中的方法返回 a scala.collection.Seq，我也可以返回 a TraversableorIterable但需要将其转换为 a scala.collection.immutable.Seq。
Is there an easy way to do this?
是否有捷径可寻？
Thanks Richard
谢谢理查德
回答by axel22
Use the tomethod to convert between arbitrary collection types in Scala 2.10:
to在 Scala 2.10 中使用该方法在任意集合类型之间进行转换：
scala> Array(1, 2, 3).toSeq
res0: Seq[Int] = WrappedArray(1, 2, 3)
scala> Array(1, 2, 3).to[collection.immutable.Seq]
res1: scala.collection.immutable.Seq[Int] = Vector(1, 2, 3)
