Created
March 28, 2014 01:49
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foldl and foldr on flipped Bool for infinite list
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| data B = T | F | |
| deriving (Eq, Show) | |
| (&&&) :: B -> B -> B | |
| b &&& T = b | |
| _ &&& F = F | |
| (|||) :: B -> B -> B | |
| _ ||| T = T | |
| b ||| F = b | |
| -- Bool | |
| foldl (&&) False $ repeat False -- ng | |
| foldr (&&) False $ repeat False -- ok | |
| -- flipped bool | |
| foldl (&&&) F $ repeat F -- ng | |
| foldr (&&&) F $ repeat F -- ng (stack overflow) |
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