如何弄平字符串的序列并在Scala中重新构建？

Question

How to flatten a Seq like ("a", "b", "c") to "a,b,c" in Scala? 如何在Scala中将Seq像("a", "b", "c")为"a,b,c" ？

And how to build one back from a comma separated String ? 以及如何用逗号分隔的String重新构建？ Thanks. 谢谢。

Answer 1

For the first, try: 首先，请尝试：

val seq = Seq("a", "b", "c")
val string = seq.mkString(",")

For the second: 对于第二个：

val parsed = string.split(",")

which returns an Array , so if it must be a Seq then: 它返回一个Array ，所以如果它必须是一个Seq则：

val parsed = string.split(",").toSeq