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stringscala

Scala: join an iterable of strings

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

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

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

Solution

  • How about mkString ?

    theStrings.mkString(",")

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

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