List functions - "Under" operations

[ajb at spamcop.net]

G'day all.

Quoting Brandon Michael Moore <brandon at its.caltech.edu>:

> Hello, and welcome me to the list

Welcome you!

> Almost all of the times I use the "By" functions follow that pattern:
> e.g.
> sortFoos :: [Foo] -> [Foo]
> sortFoos = sortBy (\x y -> compare (f x) (f y))

Just noting that this particular example has a very simple solution:

        http://haskell.org/hawiki/SchwartzianTransform

This technique probably doesn't solve all your problems, though.

Cheers,
Andrew Bromage