X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=Data%2FList.hs;h=cc166d80de94e3bb57cca73937cd1376d043a6fc;hb=4c29f6f110d23b890567b8696a964bb212eba52e;hp=87af0dbe8e2821d51e282cc3a52c35955a11e2ed;hpb=a29bd042d74b9f9d8867f2f3d375719980f5b2d1;p=ghc-base.git diff --git a/Data/List.hs b/Data/List.hs index 87af0db..cc166d8 100644 --- a/Data/List.hs +++ b/Data/List.hs @@ -230,10 +230,10 @@ infix 5 \\ -- comment to fool cpp -- It returns 'Nothing' if the list did not start with the prefix -- given, or 'Just' the list after the prefix, if it does. -- --- > stripPrefix "foo" "foobar" -> Just "bar" --- > stripPrefix "foo" "foo" -> Just "" --- > stripPrefix "foo" "barfoo" -> Nothing --- > stripPrefix "foo" "barfoobaz" -> Nothing +-- > stripPrefix "foo" "foobar" == Just "bar" +-- > stripPrefix "foo" "foo" == Just "" +-- > stripPrefix "foo" "barfoo" == Nothing +-- > stripPrefix "foo" "barfoobaz" == Nothing stripPrefix :: Eq a => [a] -> [a] -> Maybe [a] stripPrefix [] ys = Just ys stripPrefix (x:xs) (y:ys) @@ -297,8 +297,8 @@ isSuffixOf x y = reverse x `isPrefixOf` reverse y -- -- Example: -- --- >isInfixOf "Haskell" "I really like Haskell." -> True --- >isInfixOf "Ial" "I really like Haskell." -> False +-- >isInfixOf "Haskell" "I really like Haskell." == True +-- >isInfixOf "Ial" "I really like Haskell." == False isInfixOf :: (Eq a) => [a] -> [a] -> Bool isInfixOf needle haystack = any (isPrefixOf needle) (tails haystack)