Add 'flatMap' (flatTransform?) operation about google-collections

[GoogleCodeExporter]

There's a two-line implementation in terms of methods we already provide:

  public static <A, B> Iterable<B> flatTransform(Iterable<A> collection,
      Function<A, Iterable<B>> functor) {
    Iterable<Iterable<B>> iterables = Iterables.transform(collection, functor);
    return Iterables.concat(iterables);
  }

I don't see any pressing reason to add flatMap to the library.

Original comment by [email protected] on 1 Nov 2007 at 11:59

[GoogleCodeExporter]

Fair enough that it can be done in two lines, but why not have it there for 
others to
make use of?

Original comment by ryan.daum on 2 Nov 2007 at 12:19

[GoogleCodeExporter]

Because that way lies madness.

We only want to provide two-liner convenience methods for the things users do 
very,
very, very, very often.  See also

http://code.google.com/p/google-collections/issues/detail?id=18

Original comment by [email protected] on 2 Nov 2007 at 12:26

• Changed state: WontFix