Validate International Securities Identification Number: Difference between revisions
Content added Content deleted
m (→{{header|Haskell}}: used quotRem in lieu of divMod) |
m (→{{header|Haskell}}: (combined some type signatures)) |
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import Data.Maybe (fromMaybe) |
import Data.Maybe (fromMaybe) |
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isinValid :: String -> Bool |
isinValid, isinPattern, luhn :: String -> Bool |
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isinValid isin = isinPattern isin && luhn (asNumericString isin) |
isinValid isin = isinPattern isin && luhn (asNumericString isin) |
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isinPattern :: String -> Bool |
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isinPattern isin = |
isinPattern isin = |
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(length isin == 12) && |
(length isin == 12) && |
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| Line 933: | Line 932: | ||
elem (last isin) digits |
elem (last isin) digits |
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luhn :: String -> Bool |
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luhn = |
luhn = |
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(0 ==) . |
(0 ==) . |
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(` |
(`rem` 10) . |
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sum . |
sum . |
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fmap (uncurry (+) . (`quotRem` 10)) . |
fmap (uncurry (+) . (`quotRem` 10)) . |
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