Re: [Haskell-cafe] Filter by several predicates at once

On Jan 18, 2008 1:46 AM, Isaac Dupree wrote:

Neil Mitchell wrote:

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Hi

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passall, passany :: [a -> Bool] -> a -> Bool passall ps v = and $ map ($v) ps passany ps v = or $ map ($v) ps or something similar defined anywhere? Such that one can write

nearly; using Prelude: passall ps v = all ($v) ps passany ps v = any ($v) ps

See also http://haskell.org/haskellwiki/Pointfree#Swing, which would let you define passall = swing all passany = swing any Whether that's any better than the pointwise version is up to you. Stuart