Scala:加入一个可迭代的字符串 [英] Scala: join an iterable of strings

问题描述

如何在 Scala 中通过另一个字符串加入"一个可迭代的字符串?

How do I "join" an iterable of strings by another string in Scala?

val thestrings = Array("a","b","c")
val joined = ???
println(joined)

我希望这段代码输出a,b,c(用,"连接元素).

I want this code to output a,b,c (join the elements by ",").

推荐答案

mkString ?

theStrings.mkString(",")

存在一种变体，您也可以在其中指定前缀和后缀.

A variant exists in which you can specify a prefix and suffix too.

见 此处 使用 foldLeft，它更加冗长，但为了教育的缘故也许值得一看.

See here for an implementation using foldLeft, which is much more verbose, but perhaps worth looking at for education's sake.

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