JuliaLang/julia — pull request #5275 by lindahua (2014-01-01 21:02:21+00:00)
Title: Add minmax and extrema

Semantics:

```julia
extrema(x) = (minimum(x), maximum(x))
minmax(x, y) = (min(x, y), max(x, y))
```

Please let me know if there is any problem. I will add entries to helpdb & news.md after this is merged.