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Logs: liberachat/#haskell

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2025-08-24 07:55:24 <Guest84> @pl fun2 1 = 0
2025-08-24 07:55:24 <lambdabot> fun2 = const 0
2025-08-24 07:55:24 <Guest84> fun2 n
2025-08-24 07:55:25 <Guest84>   | even n = n + fun2 (n `div` 2)
2025-08-24 07:55:25 <Guest84>   | otherwise = fun2 (3 * n + 1)
2025-08-24 07:56:14 merijn joins (~merijn@host-vr.cgnat-g.v4.dfn.nl)
2025-08-24 07:57:49 × humasect quits (~humasect@dyn-192-249-132-90.nexicom.net) (Ping timeout: 255 seconds)
2025-08-24 07:58:19 <Guest84> @pl fun1' xs = product $ map (subtract 2) (filter even xs)
2025-08-24 07:58:19 <lambdabot> fun1' = product . map (subtract 2) . filter even
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2025-08-24 10:12:13 <Guest54> @pl sieveSundaram :: Integer -> [Integer]
2025-08-24 10:12:13 <Guest54> sieveSundaram n = map (\x -> 2 * x + 1) [1 .. n] \\ filter (< 2 * (n + 1)) [i + j + 2 * i * j | (i, j) <- [(x, y) | x <- [1 .. n], y <- [1 .. n]]]
2025-08-24 10:12:13 <lambdabot> (line 1, column 28):
2025-08-24 10:12:13 <lambdabot> unexpected '>'
2025-08-24 10:12:13 <lambdabot> expecting operator
2025-08-24 10:12:22 <Guest54> @pl sieveSundaram n = map (\x -> 2 * x + 1) [1 .. n] \\ filter (< 2 * (n + 1)) [i + j + 2 * i * j | (i, j) <- [(x, y) | x <- [1 .. n], y <- [1 .. n]]]
2025-08-24 10:12:23 <lambdabot> (line 1, column 50):
2025-08-24 10:12:23 <lambdabot> unexpected '\\'
2025-08-24 10:12:23 <lambdabot> expecting variable, "(", operator or end of input
2025-08-24 10:12:41 <Guest54> @pl sieveSundaram n = map (\x -> 2 * x + 1) [1 .. n] || filter (< 2 * (n + 1)) [i + j + 2 * i * j | (i, j) <- [(x, y) | x <- [1 .. n], y <- [1 .. n]]]
2025-08-24 10:12:42 <lambdabot> sieveSundaram = ap ((||) . map ((1 +) . (2 *)) . enumFromTo 1) (ap (filter . flip (<) . (2 *) . (1 +)) (return . ((i + j) +) . ((2 * i) *) . ((j | (i, j)) <-) . ap ((:) . (((x, y) | x) <-) .
2025-08-24 10:12:42 <lambdabot> enumFromTo 1) (return . (y <-) . enumFromTo 1)))
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