> Using *fluent*, the same racket code can be written according to the UNIX
> philosophy:
>
> ("data.txt" > file->lines >> filter (line : line > string-contains?
> "active") >> map (line : line > string-split > list-ref 4) >
> remove-duplicates > sort)
This reminds me of Clojure's threading macros (->, ->>, etc.), and
OCaml's "reverse-application operator": "|>", where x |> f |> g is
equivalent to (g (f x)). The tacking-on of such convenience
functions/syntax across so many functional languages is probably a sign that
many of these languages have it backwards (from a user-friendliness point of
view).
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