Expand a Set[Set[String]] into Set[String] in Scala

Posted by huynhjl on Stack Overflow See other posts from Stack Overflow or by huynhjl
Published on 2010-05-23T15:36:59Z Indexed on 2010/05/23 15:41 UTC
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scala

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scala-2.8

I have the following set of sets. I don't know ahead of time how long it will be.

val sets = Set(Set("a","b","c"), Set("1","2"), Set("S","T"))

I would like to expand it into a cartesian product:

Set("a&1&S", "a&1&T", "a&2&S", ..., "c&2&T")

How would you do that?

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