scalaz/scalaz-stream — pull request #116 by fthomas (2014-02-25 18:20:35+00:00)
Title: Add process1.(maximum|minimum)(|By|Of)

This adds the following on process1:
- maximum
- maximumBy
- maximumOf
- minimum
- minimumBy
- minimumOf

These emit a single value if their input is non-empty, and no value if it is
empty. They are similar to the functions on scalaz.Foldable:
https://github.com/scalaz/scalaz/blob/scalaz-seven/core/src/main/scala/scalaz/Foldable.scala