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klapaucius/views_vs_guards.hs

Created April 30, 2014 10:58
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views_vs_guards.hs
Prelude> let foo ys | (xs:_) <- reverse ys = case xs of xs' | (x:_) <- reverse xs' -> x
Prelude> foo [[1..3],[4..7],[8..10]]
10
Prelude> let foo' (reverse -> (reverse -> x:_):_) = x
Prelude> foo' [[1..3],[4..7],[8..10]]
10
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