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copied!<p>I want to point out that <a href="http://www.scala-lang.org/api/current/index.html#scala.math.Ordered" rel="nofollow noreferrer"><code>Ordered</code></a> has been mostly phased out of the Scala standard library in favor of the more general <a href="http://www.scala-lang.org/api/current/index.html#scala.math.Ordering" rel="nofollow noreferrer"><code>Ordering</code></a>. Unless you have a good reason for using the former that I don't know about, the latter is probably a better choice.</p> <p>It might not be much better, but if you use <code>Ordering</code> at least you can get rid of the ugly <code><%</code> operators. I'd also recommend using the same lambda shorthand that @maasg suggested (note that you can't use it for the more complex Random lambda though):</p> <pre><code>def qsortHead[A: Ordering](xs: Stream[A]) = qsort(xs)(_.head) def qsortLast[A: Ordering](xs: Stream[A]) = qsort(xs)(_.last) def qsortRandom[A: Ordering](xs: Stream[A]) = qsort(xs)(ys => ys(rng.nextInt(ys.length))) </code></pre> <p>You can look at this question if you want more info on the difference between the view-bound <code>Ordered</code> and context-bound <code>Ordering</code>: <a href="https://stackoverflow.com/questions/4465948/what-are-scala-context-and-view-bounds"><em>What are Scala context and view bounds?</em></a></p> <p>Due to the way that Scala handles generic types and does type inference, you're going to be stuck with a bunch of boilerplate pretty much no matter what. The above is probably about as succinct as you're going to be able to get.</p>

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