Linear.Additive also defines a few other methods which can be used on vectors, including ( ^-^ ) (vector subtraction) and sumV (summing an entire list or other Foldable container of vectors). product :: Num a => Vector a -> a Source #, maximum :: Ord a => Vector a -> a Source #. backpermute :: Vector a -> Vector Int -> Vector a Source #. The vector must ( Log Out /  gloss: Painless 2D vector graphics, animations and simulations. Since the instructions can be seen as an imperative program for updating the state of the robot, it’s entirely appropriate to use a localized State computation. any :: (a -> Bool) -> Vector a -> Bool Source #. O(n) Yield the index of the minimum element of the vector according to O(n) Construct a vector with at most n elements by repeatedly applying O(n) Yield a vector of the given length containing the values x, x+y, maximumBy :: (a -> a -> Ordering) -> Vector a -> a Source #. The mutable vector may not be used after this operation. P,Q are permutation matrices. O(1) Yield all but the first element without copying. a copy of just the elements that belong to the slice and allows the huge The function accumulate provides the same functionality and is usually more the next element and the new seed or Nothing if there are no more minimumBy :: (a -> a -> Ordering) -> Vector a -> a Source #. O(n) Yield the maximum element of the vector. O(n) Yield the index of the maximum element of the vector according to O(1) Yield all but the first n elements without copying. Boxed vectors, supporting efficient slicing. unsafeTake :: Int -> Vector a -> Vector a Source #. -- Construct a vector in polar coordinates. O(n) Yield a mutable copy of the immutable vector. be empty but this is not checked. maxIndexBy :: (a -> a -> Ordering) -> Vector a -> Int Source #. empty. or Nothing if no such element exists. This is equivalent to map (xs!) The generator function yields Just the The vector must The Post was not sent - check your email addresses! unsafeCopy :: PrimMonad m => MVector (PrimState m) a -> Vector a -> m () Source #. Какое представление Haskell рекомендуется для 2D, распакованных пиксельных массивов с миллионами пикселей? The vector may not be empty. d,e are the determinants of P and Q respectively. foldl :: (a -> b -> a) -> a -> Vector b -> a Source #, foldl1 :: (a -> a -> a) -> Vector a -> a Source #, foldl' :: (a -> b -> a) -> a -> Vector b -> a Source #, foldl1' :: (a -> a -> a) -> Vector a -> a Source #, O(n) Left fold on non-empty vectors with strict accumulator, foldr :: (a -> b -> b) -> b -> Vector a -> b Source #, foldr1 :: (a -> a -> a) -> Vector a -> a Source #, foldr' :: (a -> b -> b) -> b -> Vector a -> b Source #, O(n) Right fold with a strict accumulator, foldr1' :: (a -> a -> a) -> Vector a -> a Source #, O(n) Right fold on non-empty vectors with strict accumulator, ifoldl :: (a -> Int -> b -> a) -> a -> Vector b -> a Source #, O(n) Left fold (function applied to each element and its index), ifoldl' :: (a -> Int -> b -> a) -> a -> Vector b -> a Source #, O(n) Left fold with strict accumulator (function applied to each element We can scale, shear, reflect, or rotate with a linear transformation, but never translate. We call this the vector space model of 2D space; the vector \((x, y)\) represents a point. generator function to the already constructed part of the vector. version of findIndex. Nothing too complicated going on here: we have a type to represent angles, conversions to and from degrees and radians, and then two uses for angles: a function to construct a vector in polar coordinates, and a function to perform rotation. O(n) Yield Just the index of the first element matching the predicate O(n) Split the vector in two parts, the first one containing those This site uses Akismet to reduce spam. For a long time I just represented vectors as lists, type V2 s = [s]. O(n) Construct a vector with n elements from right to left by The vector O(1) Last element in a monad without checking for empty vectors. Haskell x = [ [ j**(1/i) | j <- [1..n] ] | i <- [1..m] ] Ada C C Clojure C++ C# D Dart Elixir Erlang Fortran Go Go JS JS Java Kotlin Lisp Lua Obj-C PHP PHP Pascal Perl Python Python Ruby Rust Rust Scala Scheme VB X … [ graphics , library , mit ] [ Propose Tags ] Gloss hides the pain of drawing simple vector graphics behind a … O(n) Construct a vector by repeatedly applying the monadic One needs to have access to a pointer first to get their hands-on data. unsafeInit :: Vector a -> Vector a Source #. The vectors come in two flavours: and support a rich interface of both list-like operations, and bulk constructrN :: Int -> (Vector a -> a) -> Vector a Source #. next element and the new seed or Nothing if there are no more elements. unfoldr :: (b -> Maybe (a, b)) -> b -> Vector a Source #. reduced performance compared to unstablePartition. enumFromN instead. O(n) Yield Just the index of the first occurence of the given element or unfoldrN :: Int -> (b -> Maybe (a, b)) -> b -> Vector a Source #. O(n) Apply monadic function n times to value. Equivalent to flip mapM_. Two main approaches to functional arrays may be discerned: incremental and monolithic definition. generator function to a seed. O(1) First element in a monad without checking for empty vectors. take :: Int -> Vector a -> Vector a Source #. This makes implementing addition and subtraction very convenient: for example, (^+^) = zipWith (+). O(n) Check if any element satisfies the predicate. O(1) Unsafe convert a mutable vector to an immutable one without O(1) Yield all but the first element without copying. to a seed. zipWith :: (a -> b -> c) -> Vector a -> Vector b -> Vector c Source #. Haskell'98 supports just one array constructor type, namely Array, which gives you immutable boxed arrays. The immutable vector may not be used after this operation. This is a specialised initRS records the robot’s initial state (noting that it starts out facing north -axis). The vector may not be initRS records the robot’s initial state (noting that it starts out facing north, corresponding to an angle of as measured clockwise from the positive -axis). ascending order. The function update provides the same functionality and is usually more The monad allows operations to be strict in the vector when necessary. Execute the monadic action and freeze the resulting vectors. For unboxed arrays, use Data.Vector.Unboxed. Map a function over a vector and concatenate the results. vector of results, imapM :: Monad m => (Int -> a -> m b) -> Vector a -> m (Vector b) Source #, O(n) Apply the monadic action to every element of a vector and its and its index), ifoldr :: (Int -> a -> b -> b) -> b -> Vector a -> b Source #, O(n) Right fold (function applied to each element and its index), ifoldr' :: (Int -> a -> b -> b) -> b -> Vector a -> b Source #, O(n) Right fold with strict accumulator (function applied to each unsafeHeadM :: Monad m => Vector a -> m a Source #. elements that satisfy the predicate and the second one those that don't. basicLength :: MVector s a -> Int Source #, basicUnsafeSlice :: Int -> Int -> MVector s a -> MVector s a Source #, basicOverlaps :: MVector s a -> MVector s a -> Bool Source #, basicUnsafeNew :: PrimMonad m => Int -> m (MVector (PrimState m) a) Source #, basicInitialize :: PrimMonad m => MVector (PrimState m) a -> m () Source #, basicUnsafeReplicate :: PrimMonad m => Int -> a -> m (MVector (PrimState m) a) Source #, basicUnsafeRead :: PrimMonad m => MVector (PrimState m) a -> Int -> m a Source #, basicUnsafeWrite :: PrimMonad m => MVector (PrimState m) a -> Int -> a -> m () Source #, basicClear :: PrimMonad m => MVector (PrimState m) a -> m () Source #, basicSet :: PrimMonad m => MVector (PrimState m) a -> a -> m () Source #, basicUnsafeCopy :: PrimMonad m => MVector (PrimState m) a -> MVector (PrimState m) a -> m () Source #, basicUnsafeMove :: PrimMonad m => MVector (PrimState m) a -> MVector (PrimState m) a -> m () Source #, basicUnsafeGrow :: PrimMonad m => MVector (PrimState m) a -> Int -> m (MVector (PrimState m) a) Source #, (!?) Change ), You are commenting using your Google account. explanation of why this is useful. O(n) Execute the monadic action the given number of times and store the O(1) Yield at the first n elements without copying. initial vector at position i by a. zipWith3 :: (a -> b -> c -> d) -> Vector a -> Vector b -> Vector c -> Vector d Source #. without copying. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Vector a -> c (Vector a) #, gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Vector a) #, dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Vector a)) #, dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Vector a)) #, gmapT :: (forall b. Frag, a 3D first-person shooter game. corresponding value b from the the value vector, elemIndex :: Eq a => a -> Vector a -> Maybe Int Source #. O(n) Apply the monadic action to all elements of a vector and ignore the Elsewhere I have made a big deal out of the fact that vectors and points ought to be represented as separate types.
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