Ask HN: What is the cleanest code sample you've seen?

Quicksort in Haskell

    quicksort :: (Ord a) => [a] -> [a]  
    quicksort [] = []  
    quicksort (x:xs) =   
        let smallerSorted = quicksort [a | a <- xs, a <= x]  
            biggerSorted = quicksort [a | a <- xs, a > x]  
        in  smallerSorted ++ [x] ++ biggerSorted

Source: http://learnyouahaskell.com/recursion#hello-recursion

Guacamole rdp client is nice

https://github.com/glyptodon/guacamole-server

Jon Harrop's code samples for the F# journal are pretty clean, though he charges for access:

http://www.ffconsultancy.com/products/fsharp_journal/index.h...

Physically Based Rendering by Pharr and Humphrey (literate program, won an Academy Award)

print("hello world")

Everyone talks about clean code, but where are the real world examples? Javascript, Python, something useful and which inspires that the ideal of clean code is actually possible.

I'm considering the perspective that think clean code is this ideal that can be misused by reviewers to blackball otherwise good code for arbitrary personal reasons.

I know the book Clean Code and I like the ideas in it. I just haven't seen any production examples and I'm considering the idea that talking about clean code is a hand waving way to criticize others contributions without substance.