string Scala：加入一个可迭代的字符串

Scala: join an iterable of strings

提问by scala_newbie

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

如何通过 Scala 中的另一个字符串“加入”一个可迭代的字符串？

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

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

我希望此代码输出a,b,c（通过“，”加入元素）。

回答by Brian Agnew

How about mkString?

mkString怎么样？

theStrings.mkString(",")

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

存在一个变体，您也可以在其中指定前缀和后缀。

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

有关使用foldLeft的实现，请参见此处，该实现要冗长得多，但出于教育目的，也许值得一看。