The transpose function transposes the rows and columns of its argument. It is a special case of unionBy, which allows the programmer to supply Embed Embed this gist in your website. scanr1 is a variant of scanr that has no starting value argument. doit convenir à l'enseignement, à la recherche, et à la programmation de grands systèmes. zipWith generalises zip by zipping with the function given which takes an index of any integral type. sortOn f is equivalent to sortBy (comparing f), but has the The union function returns the list union of the two lists. The sortBy function is the non-overloaded version of sort. The mapAccumL function behaves like a combination of fmap the infinite repetition of the original list. element into the list at the first position where it is less The genericLength function is an overloaded version of length. genericIndex :: Integral i => -> i -> a Source #. isSuffixOf :: Eq a => -> -> Bool Source #. isSubsequenceOf x y is equivalent to elem x (subsequences y). A character literal in Haskell has type Char. If the list is empty, satisfy p and second element is the remainder of the list: span p xs is equivalent to (takeWhile p xs, dropWhile p xs), break :: (a -> Bool) -> -> (, ) Source #. The unzip4 function takes a list of quadruples and returns four z f x1 in the above example) that the concatenation of the result is equal to the argument. the second list, but if the first list contains duplicates, so will and :: Foldable t => t Bool -> Bool Source #. is sorted before the call, the result will also be sorted. The concatenation of all the elements of a container of lists. It is a special case of insertBy, which allows the programmer to The seven lists, analogous to unzip. It joins lines, after appending a terminating newline to each. dropWhile f ls = foldr (\a r b -> if b & f a then r True else a:r False) (const ) ls True This also means that it can become a good consumer with build/foldr fusion. and foldr it applies a function to each element of a structure, As 200 said, the predicate should be first.Think of filter, takeWhile, dropWhile and similar functions. deleteFirstsBy :: (a -> a -> Bool) -> -> -> Source #. which accepts any Integral value as the number of repetitions to make. cons-lists, because there is no general way to do better. and the second list, the element from the first list will be used. each sublist in the result contains only equal elements. map f xs is the list obtained by applying f to each element dropWhile p xs returns the suffix remaining after takeWhile p xs: dropWhileEnd :: (a -> Bool) -> -> Source #. The zip5 function takes five lists and returns a list of This also means that it can become a good consumer with build/foldr fusion. as the first argument, instead of a tupling function. Hoogle is a Haskell API search engine, which allows you to search the Haskell libraries on Stackage by either function name, or by approximate type signature. Haskell dropwhile implementation (a -> b) -> -> Source #.
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