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imap :: forall f a b. Invariant f => (a -> b) -> (b -> a) -> f a -> f b
P purescript-invariant M Data.Functor.Invariant
imapF :: forall f a b. Functor f => (a -> b) -> (b -> a) -> f a -> f b

As all Functors are also trivially Invariant, this function can be used as the imap implementation for any types that has an existing Functor instance.

P purescript-invariant M Data.Functor.Invariant
imapC :: forall f a b. Contravariant f => (a -> b) -> (b -> a) -> f a -> f b

As all Contravariant functors are also trivially Invariant, this function can be used as the imap implementation for any types that have an existing Contravariant instance.

P purescript-contravariant M Data.Functor.Contravariant
under :: forall t a s b. Newtype t a => Newtype s b => (a -> t) -> (t -> s) -> a -> b

The opposite of over: lowers a function that operates on Newtyped values to operate on the wrapped value instead.

newtype Degrees = Degrees Number
derive instance newtypeDegrees :: Newtype Degrees _

newtype NormalDegrees = NormalDegrees Number
derive instance newtypeNormalDegrees :: Newtype NormalDegrees _

normaliseDegrees :: Degrees -> NormalDegrees
normaliseDegrees (Degrees deg) = NormalDegrees (deg % 360.0)

asNormalDegrees :: Number -> Number
asNormalDegrees = under Degrees normaliseDegrees

As with over the Newtype is polymorphic, as illustrated in the example above - both Degrees and NormalDegrees are instances of Newtype, so even though normaliseDegrees changes the result type we can still put a Number in and get a Number out via under.

P purescript-newtype M Data.Newtype
compose :: forall c b a. (b -> c) -> (a -> b) -> (a -> c)

Returns a new function that calls the first function with the result of calling the second.

let addTwo x = x + 2
let double x = x * 2
let addTwoThenDouble x = addTwo :compose double
addTwoThenDouble 3 -- 10

This is function composition.

P purescript-neon M Neon.Primitive.Function
memoCompose :: forall a b c. (a -> b) -> (b -> c) -> a -> c

Memoize the composition of two functions

P purescript-pha M Pha.Util
fold :: forall f z xs r fproxy kproxy lproxy. Fold f z xs r => fproxy f -> kproxy z -> lproxy xs -> kproxy r
P purescript-typelevel-lists M Type.Data.List
foldr :: forall f z xs r fproxy kproxy lproxy. Foldr f z xs r => fproxy f -> kproxy z -> lproxy xs -> kproxy r
P purescript-typelevel-lists M Type.Data.List
clamp1 :: forall f a. Ord1 f => f a -> f a -> f a -> f a
P purescript-higher-order M Data.Operator.Ord
rgetOrAlt :: forall f g s l r v r' i h. RGetOrAlt f g s l r => Alternative h => Cons s v r' r => RLProxying i l => i l -> g s -> f r -> h v
P purescript-struct M Data.Struct.GetOrAlt.RGetOrAlt
over :: forall t a s b. Newtype t a => Newtype s b => (a -> t) -> (a -> b) -> t -> s

Lifts a function operate over newtypes. This can be used to lift a function to manipulate the contents of a single newtype, somewhat like map does for a Functor:

newtype Label = Label String
derive instance newtypeLabel :: Newtype Label _

toUpperLabel :: Label -> Label
toUpperLabel = over Label String.toUpper

But the result newtype is polymorphic, meaning the result can be returned as an alternative newtype:

newtype UppercaseLabel = UppercaseLabel String
derive instance newtypeUppercaseLabel :: Newtype UppercaseLabel _

toUpperLabel' :: Label -> UppercaseLabel
toUpperLabel' = over Label String.toUpper
P purescript-newtype M Data.Newtype
between :: forall a close open m. Apply m => m open -> m close -> m a -> m a
P purescript-parsers M Text.Parsing.Combinators
on :: forall @sym f1 f2 a b r1 r2. Newtype f2 (Variant r2) => Newtype f1 (Variant r1) => Cons sym a r1 r2 => IsSymbol sym => (a -> b) -> (f1 -> b) -> f2 -> b
P purescript-prospero M Prospero.VariantHelper
intercalateMap :: forall f m a. Foldable1 f => Semigroup m => m -> (a -> m) -> f a -> m

Fold a data structure, accumulating values in some Semigroup, combining adjacent elements using the specified separator.

P purescript-foldable-traversable M Data.Semigroup.Foldable
surroundMap :: forall f a m. Foldable f => Semigroup m => m -> (a -> m) -> f a -> m

foldMap but with each element surrounded by some fixed value.

For example:

> surroundMap "*" show []
= "*"

> surroundMap "*" show [1]
= "*1*"

> surroundMap "*" show [1, 2]
= "*1*2*"

> surroundMap "*" show [1, 2, 3]
= "*1*2*3*"
P purescript-foldable-traversable M Data.Foldable
lerp :: forall f a. Additive f => Ring a => a -> f a -> f a -> f a

Linear interpolation: lerp t a b = a + t * (b - a)

  • lerp 0.0 a b = a
  • lerp 1.0 a b = b
P purescript-linear M Linear.Vector
substitute :: forall f a. Monad f => Eq a => a -> f a -> f a -> f a
P purescript-bound M Bound
rget :: forall f g s l r v r' h. RGet f g s l r => Cons s v r' r => RLProxying h l => h l -> g s -> f r -> v
P purescript-struct M Data.Struct.Get.RGet
substituteVar :: forall f a. Functor f => Eq a => a -> a -> f a -> f a
P purescript-bound M Bound
liftA1 :: forall f a b. Applicative f => (a -> b) -> f a -> f b

liftA1 provides a default implementation of (<$>) for any Applicative functor, without using (<$>) as provided by the Functor-Applicative superclass relationship.

liftA1 can therefore be used to write Functor instances as follows:

instance functorF :: Functor F where
  map = liftA1
P purescript-prelude M Control.Applicative
liftM1 :: forall m a b. Monad m => (a -> b) -> m a -> m b

liftM1 provides a default implementation of (<$>) for any Monad, without using (<$>) as provided by the Functor-Monad superclass relationship.

liftM1 can therefore be used to write Functor instances as follows:

instance functorF :: Functor F where
  map = liftM1
P purescript-prelude M Control.Monad
map :: forall f a b. Functor f => (a -> b) -> f a -> f b
P purescript-prelude M Data.Functor
mapFlipped :: forall f a b. Functor f => f a -> (a -> b) -> f b

mapFlipped is map with its arguments reversed. For example:

[1, 2, 3] <#> \n -> n * n
P purescript-prelude M Data.Functor
all :: forall a b f. Foldable f => HeytingAlgebra b => (a -> b) -> f a -> b

all f is the same as and <<< map f; map a function over the structure, and then get the conjunction of the results.

P purescript-foldable-traversable M Data.Foldable
any :: forall a b f. Foldable f => HeytingAlgebra b => (a -> b) -> f a -> b

any f is the same as or <<< map f; map a function over the structure, and then get the disjunction of the results.

P purescript-foldable-traversable M Data.Foldable
foldMap :: forall f a m. Foldable f => Monoid m => (a -> m) -> f a -> m
P purescript-foldable-traversable M Data.Foldable
foldMap1 :: forall t a m. Foldable1 t => Semigroup m => (a -> m) -> t a -> m
P purescript-foldable-traversable M Data.Semigroup.Foldable
foldMap1DefaultL :: forall t m a. Foldable1 t => Functor t => Semigroup m => (a -> m) -> t a -> m

A default implementation of foldMap1 using foldl1.

Note: when defining a Foldable1 instance, this function is unsafe to use in combination with foldl1Default.

P purescript-foldable-traversable M Data.Semigroup.Foldable
foldMap1DefaultR :: forall t m a. Foldable1 t => Functor t => Semigroup m => (a -> m) -> t a -> m

A default implementation of foldMap1 using foldr1.

Note: when defining a Foldable1 instance, this function is unsafe to use in combination with foldr1Default.

P purescript-foldable-traversable M Data.Semigroup.Foldable
foldMapDefault :: forall i f a m. FoldableWithIndex i f => Monoid m => (a -> m) -> f a -> m

A default implementation of foldMap using foldMapWithIndex

P purescript-foldable-traversable M Data.FoldableWithIndex
foldMapDefaultL :: forall f a m. Foldable f => Monoid m => (a -> m) -> f a -> m

A default implementation of foldMap using foldl.

Note: when defining a Foldable instance, this function is unsafe to use in combination with foldlDefault.

P purescript-foldable-traversable M Data.Foldable
foldMapDefaultR :: forall f a m. Foldable f => Monoid m => (a -> m) -> f a -> m

A default implementation of foldMap using foldr.

Note: when defining a Foldable instance, this function is unsafe to use in combination with foldrDefault.

P purescript-foldable-traversable M Data.Foldable
mapDefault :: forall i f a b. FunctorWithIndex i f => (a -> b) -> f a -> f b

A default implementation of Functor's map in terms of mapWithIndex

P purescript-foldable-traversable M Data.FunctorWithIndex
tracks :: forall w a t. ComonadTraced t w => (a -> t) -> w a -> a

Extracts a value at a relative position which depends on the current value.

P purescript-transformers M Control.Comonad.Traced.Class
flippedMap :: forall f a b. Functor f => f a -> (a -> b) -> f b
P purescript-signal M Signal
squigglyMap :: forall f a b. Functor f => (a -> b) -> f a -> f b
P purescript-signal M Signal
map :: forall p q a b. Dissect p q => (a -> b) -> p a -> p b

A tail-recursive map operation, implemented in terms of Dissect.

P purescript-dissect M Dissect.Class
defaultFilter :: forall a h f. BooleanEq h => Applicative f => Foldable f => Monoid (f a) => (a -> h) -> f a -> f a
P purescript-filterables M Data.Filterable
filter :: forall f h a. Filterable f => BooleanEq h => (a -> h) -> f a -> f a
P purescript-filterables M Data.Filterable
map :: forall a c b. HasMap a => (b -> c) -> a b -> a c
P purescript-neon M Neon.Class.HasMap
map :: forall f a b. Functor f => (a -> b) -> f a -> f b
P purescript-qualified-do M QualifiedDo.ParApply
mkQ :: forall a b r. Typeable a => Typeable b => r -> (b -> r) -> a -> r
P purescript-ajnsit-typeable M Data.Data
asks :: forall e1 e2 w a. ComonadAsk e1 w => (e1 -> e2) -> w a -> e2

Get a value which depends on the environment.

P purescript-transformers M Control.Comonad.Env.Class
cmap :: forall f a b. Contravariant f => (b -> a) -> f a -> f b
P purescript-contravariant M Data.Functor.Contravariant
cmapFlipped :: forall a b f. Contravariant f => f a -> (b -> a) -> f b

cmapFlipped is cmap with its arguments reversed.

P purescript-contravariant M Data.Functor.Contravariant
censor :: forall w m a. MonadWriter w m => (w -> w) -> m a -> m a

Modify the final accumulator value by applying a function.

P purescript-transformers M Control.Monad.Writer.Class
local :: forall e w a. ComonadEnv e w => (e -> e) -> w a -> w a
P purescript-transformers M Control.Comonad.Env.Class
local :: forall r m a. MonadReader r m => (r -> r) -> m a -> m a
P purescript-transformers M Control.Monad.Reader.Class
peeks :: forall s a w. ComonadStore s w => (s -> s) -> w a -> a

Extract a value from a position which depends on the current position.

P purescript-transformers M Control.Comonad.Store.Class
seeks :: forall s a w. ComonadStore s w => (s -> s) -> w a -> w a

Reposition the focus at the specified position, which depends on the current position.

P purescript-transformers M Control.Comonad.Store.Class
censorAccum :: forall acc html a. Accum acc html => (acc -> acc) -> html a -> html a
P purescript-chameleon-transformers M Chameleon.Transformers.Accum.Class
setCtx :: forall ctx html a. Ctx ctx html => (ctx -> ctx) -> html a -> html a
P purescript-chameleon-transformers M Chameleon.Transformers.Ctx.Class
mapErr :: forall e m a. MonadError e m => (e -> e) -> m a -> m a
P purescript-ts-bridge M TsBridge.Types
intercept :: forall a e g f. ErrorControl f g e => f a -> (e -> a) -> g a
P purescript-errorcontrol M Error.Control
apply :: forall a b. (a -> b) -> a -> b

Applies a function to an argument. This is primarily used as the operator ($) which allows parentheses to be omitted in some cases, or as a natural way to apply a chain of composed functions to a value.

P purescript-prelude M Data.Function
applyFlipped :: forall a b. a -> (a -> b) -> b

Applies an argument to a function. This is primarily used as the (#) operator, which allows parentheses to be omitted in some cases, or as a natural way to apply a value to a chain of composed functions.

P purescript-prelude M Data.Function
un :: forall t a. Newtype t a => (a -> t) -> t -> a

Given a constructor for a Newtype, this returns the appropriate unwrap function.

P purescript-newtype M Data.Newtype
enumFromThenTo :: forall f a. Unfoldable f => Functor f => BoundedEnum a => a -> a -> a -> f a

Returns a sequence of elements from the first value, taking steps according to the difference between the first and second value, up to (but not exceeding) the third value.

enumFromThenTo 0 2 6 = [0, 2, 4, 6]
enumFromThenTo 0 3 5 = [0, 3]

Note that there is no BoundedEnum instance for integers, they're just being used here for illustrative purposes to help clarify the behaviour.

The example shows Array return values, but the result can be any type with an Unfoldable1 instance.

P purescript-enums M Data.Enum
areads :: forall m r s a. MonadEffect m => Refer s r => (s -> a) -> r -> m a
P purescript-webb-refer M Webb.State.Prelude
freads :: forall m r s a. MonadEffect m => Refer s r => r -> (s -> a) -> m a
P purescript-webb-refer M Webb.State.Prelude
memoize :: forall a b. Tabulate a => (a -> b) -> a -> b

Memoize a function of one argument

P purescript-open-memoize M Data.Function.Memoize
memoize :: forall b a. Tabulate a => (a -> b) -> a -> b

Memoize a function of one argument

P purescript-memoize M Data.Function.Memoize
over :: forall s t a b @sym lenses. IsSymbol sym => ParseSymbol sym lenses => ConstructBarlow lenses Function s t a b => (a -> b) -> s -> t
P purescript-barlow-lens M Data.Lens.Barlow.Helpers
_call :: forall b a. a -> (a -> b) -> b
P purescript-neon M Neon.Operator
applicator :: forall b a. (a -> b) -> a -> b

A combinator - applicator

Λ a b . (a → b) → a → b

λ f x . f x

P purescript-birds M Aviary.Birds
extract :: forall r x a. TypeEquals r x => r -> (x -> a) -> a
P purescript-eta-conversion M Data.ReaderTEtaConversionTransformer
foldMap :: forall a b s. Convert s (Statements a) => Monoid b => (a -> b) -> s -> b
P purescript-qualified-do M QualifiedDo.FoldMap
idstar :: forall b a. (a -> b) -> a -> b

I* combinator - id bird once removed

S(SK)

Λ a b . (a → b) → a → b

λ f x . f x

P purescript-birds M Aviary.Birds
liftF :: forall b a f. Applicative f => (a -> b) -> a -> f b
P purescript-simple-parser M Text.Parsing.Util
local :: forall a b r. (a -> b) -> (Ask b => r) -> (Ask a => r)

Run a function over an implicit parameter

Note: Be careful while using this to map over the value without updating the type.

-- evaluates to `1`, not `2`
provide 1 (local ((*) 2) (ask @Int))
P purescript-ask M Control.Ask
mapUndefined :: forall b a. (a -> b) -> a -> b
P purescript-reactnative M ReactNative.Internal.Undefinable
memoize :: forall a b. (a -> b) -> a -> b

Memoize the function f. If the argument of f differs from the previous call, then f is recomputed.

P purescript-pha M Pha.Util
moldMap :: forall t e m. Moldable t e => Monoid m => (e -> m) -> t -> m
P purescript-moldy M Data.Moldy
moldMapDefaultL :: forall m e t. Moldable t e => Monoid m => (e -> m) -> t -> m
P purescript-moldy M Data.Moldy
moldMapDefaultR :: forall m e t. Moldable t e => Monoid m => (e -> m) -> t -> m

A default implementation of moldMap based on moldr

P purescript-moldy M Data.Moldy
nmap :: forall fa fb a b. NestedFunctor fa fb a b => (a -> b) -> fa -> fb
P purescript-nested-functor M Data.Functor.Nested
nmapFlipped :: forall b a fb fa. NestedFunctor fa fb a b => fa -> (a -> b) -> fb
P purescript-nested-functor M Data.Functor.Nested

t

t :: forall b a. a -> (a -> b) -> b

Reverse application which is probably exist inside Lens module

P purescript-birds M Aviary.Birds

t

t :: forall b a. a -> (a -> b) -> b
P purescript-combinators M Data.Combinators
thrush :: forall b a. a -> (a -> b) -> b

T combinator - thrush

CI

Λ a b . a → (a → b) → b

λ x f . f x

P purescript-birds M Aviary.Birds
modify :: forall t a. Newtype t a => (a -> a) -> t -> t

This combinator unwraps the newtype, applies a monomorphic function to the contained value and wraps the result back in the newtype

P purescript-newtype M Data.Newtype
amodify :: forall m r s. MonadEffect m => Refer s r => (s -> s) -> r -> m s
P purescript-webb-refer M Webb.State.Prelude
fmodify :: forall m r s. MonadEffect m => Refer s r => r -> (s -> s) -> m s
P purescript-webb-refer M Webb.State.Prelude
transAnaT :: forall t f. Recursive t f => Corecursive t f => (t -> t) -> t -> t
P purescript-matryoshka M Matryoshka.Unfold
transCataT :: forall t f. Recursive t f => Corecursive t f => (t -> t) -> t -> t
P purescript-matryoshka M Matryoshka.Fold
bind :: forall a. Semigroup a => a -> (a -> a) -> a
P purescript-qualified-do M QualifiedDo.Semigroup
everywhere :: forall a. Data a => (forall b. Data b => b -> b) -> a -> a

Apply a transformation everywhere, bottom-up

P purescript-ajnsit-typeable M Data.Data
everywhere' :: forall a. Data a => (forall b. Data b => b -> b) -> a -> a

Apply a transformation everywhere, top-down

P purescript-ajnsit-typeable M Data.Data
gmapT :: forall a. Data a => (forall b. Data b => b -> b) -> a -> a

A generic transformation that maps over the immediate subterms

P purescript-ajnsit-typeable M Data.Data
iterate :: forall a u. Unfoldable1 u => (a -> a) -> a -> u a

Create an infinite Unfoldable1 by repeated application of a function to a seed value. Analogous to iterateN, but with no iteration limit.

This should only be used to produce either lazy types (like lazy Lists) or types with truncating Unfoldable1 instances (like Maybe).

P purescript-trivial-unfold M Data.Unfoldable1.Trivial1
mkT :: forall a b. Typeable a => Typeable b => (b -> b) -> a -> a
P purescript-ajnsit-typeable M Data.Data
applyFirst :: forall a b f. Apply f => f a -> f b -> f a

Combine two effectful actions, keeping only the result of the first.

P purescript-prelude M Control.Apply
applySecond :: forall a b f. Apply f => f a -> f b -> f b

Combine two effectful actions, keeping only the result of the second.

P purescript-prelude M Control.Apply
asks :: forall r m a. MonadAsk r m => (r -> a) -> m a

Projects a value from the global context in a MonadAsk.

P purescript-transformers M Control.Monad.Reader.Class
gets :: forall s m a. MonadState s m => (s -> a) -> m a

Get a value which depends on the current state.

P purescript-transformers M Control.Monad.State.Class
mreads :: forall m s a. ReferM s m => (s -> a) -> m a
P purescript-webb-refer M Webb.State.Prelude
mulNat :: forall proxy a b c. ProductNat a b c => proxy a -> proxy b -> proxy c
P purescript-typelevel-peano M Type.Data.Peano.Nat.Definition
plus :: forall proxy a b c. SumInt a b c => proxy a -> proxy b -> proxy c
P purescript-typelevel-peano M Type.Data.Peano.Int.Definition
plusNat :: forall proxy a b c. SumNat a b c => proxy a -> proxy b -> proxy c
P purescript-typelevel-peano M Type.Data.Peano.Nat.Definition
powNat :: forall proxy a b c. ExponentiationNat a b c => proxy a -> proxy b -> proxy c
> powNat d2 d3
8 -- : NProxy D8

a raised to the power of b a^b = c

P purescript-typelevel-peano M Type.Data.Peano.Nat.Definition
prod :: forall proxy a b c. ProductInt a b c => proxy a -> proxy b -> proxy c
P purescript-typelevel-peano M Type.Data.Peano.Int.Definition
sampleOnLeft_ :: forall event a b. IsEvent event => event a -> event b -> event b
P purescript-hyrule M FRP.Event.Class
sampleOnRight_ :: forall event a b. IsEvent event => event a -> event b -> event a

Create an Event which samples the latest values from the first event at the times when the second event fires, ignoring the values produced by the second event.

P purescript-hyrule M FRP.Event.Class
concat :: forall xs ys zs lproxy. Concat xs ys zs => lproxy xs -> lproxy ys -> lproxy zs
P purescript-typelevel-lists M Type.Data.List
drop :: forall n xs ys lproxy iproxy. Drop n xs ys => iproxy n -> lproxy xs -> lproxy ys
P purescript-typelevel-lists M Type.Data.List
map :: forall f xs ys fproxy kproxy lproxy. Map f xs ys => fproxy f -> kproxy xs -> lproxy ys
P purescript-typelevel-lists M Type.Data.List
sampleOn_ :: forall b a event. IsEvent event => event a -> event b -> event a

Create an Event which samples the latest values from the first event at the times when the second event fires, ignoring the values produced by the second event.

P purescript-event M FRP.Event.Class
take :: forall n xs ys lproxy iproxy. Take n xs ys => iproxy n -> lproxy xs -> lproxy ys
P purescript-typelevel-lists M Type.Data.List
zip :: forall x y z lproxy. Zip x y z => lproxy x -> lproxy y -> lproxy z
P purescript-typelevel-lists M Type.Data.List
applyFirst :: forall v1 v0 f c. HasApply c f => HasConst c => HasMap c f => ObjectOf c v0 => ObjectOf c v1 => ObjectOf c (c v1 v0) => f v0 -> f v1 -> f v0
P purescript-subcategory M Control.Subcategory.Functor.HasApply
applySecond :: forall v1 v0 f c. HasApply c f => HasConst c => HasIdentity c => HasMap c f => ObjectOf c v0 => ObjectOf c v1 => ObjectOf c (c v1 v1) => ObjectOf c (c v0 (c v1 v1)) => ObjectOf c (c (c v1 v1) (c v0 (c v1 v1))) => f v0 -> f v1 -> f v1
P purescript-subcategory M Control.Subcategory.Functor.HasApply
buildNode :: forall e f p v. ElementBuilder e f p v => e -> f p -> v -> v
P purescript-concur-core M Concur.Core.ElementBuilder
get :: forall v s r' r l g f. Cons s v r' r => RGet f g s l r => RowToList r l => g s -> f r -> v
P purescript-struct M Data.Struct.Get.Get
getOrAlt :: forall v s r' r l h g f. Alternative h => Cons s v r' r => RowToList r l => RGetOrAlt f g s l r => g s -> f r -> h v
P purescript-struct M Data.Struct.GetOrAlt.GetOrAlt
match :: forall v r1 r0 l1 l0 g f. RMatch f g v l0 r0 l1 r1 => RowToList r0 l0 => RowToList r1 l1 => f r0 -> g r1 -> v
P purescript-struct M Data.Struct.Match.Match
curryN :: forall args result curried. CurryN args result curried => (args -> result) -> curried
P purescript-transit M Transit.Class.CurryN
foldEnum :: forall a b. BoundedEnum a => Semigroup b => (a -> b) -> b

Map each element of a BoundedEnum into a semigroup, and combine the results through refold1.

P purescript-trivial-unfold M Data.Unfoldable1.Trivial1
on :: forall evt obj callback out proxy. On evt obj callback out => proxy evt -> obj -> callback -> out
P purescript-node-websocket M Node.Websocket
tabulate :: forall f a b. Representable f a => (a -> b) -> f b
P purescript-functor-vector M Data.Functor.Representable
alt :: forall f a. Alt f => f a -> f a -> f a
P purescript-control M Control.Alt
fix :: forall l. Lazy l => (l -> l) -> l

fix defines a value as the fixed point of a function.

The Lazy instance allows us to generate the result lazily.

P purescript-control M Control.Lazy
choose :: forall m a. MonadGen m => m a -> m a -> m a

Creates a generator that outputs a value chosen from one of two existing existing generators with even probability.

P purescript-gen M Control.Monad.Gen
modify :: forall s m. MonadState s m => (s -> s) -> m s

Modify the state by applying a function to the current state. The returned value is the new state value.

P purescript-transformers M Control.Monad.State.Class
mmodify :: forall m s. ReferM s m => (s -> s) -> m s
P purescript-webb-refer M Webb.State.Prelude
addU :: forall repr u. UnitArith repr => repr u -> repr u -> repr u

Add two values with the same unit

P purescript-hylograph-selection M Hylograph.Expr.Units
addUnitOp :: forall repr u. UnitArith repr => repr u -> repr u -> repr u
P purescript-hylograph-selection M Hylograph.Expr.Sugar
subU :: forall repr u. UnitArith repr => repr u -> repr u -> repr u

Subtract two values with the same unit

P purescript-hylograph-selection M Hylograph.Expr.Units
subUnitOp :: forall repr u. UnitArith repr => repr u -> repr u -> repr u
P purescript-hylograph-selection M Hylograph.Expr.Sugar
max1 :: forall f a. Ord1 f => f a -> f a -> f a
P purescript-higher-order M Data.Operator.Ord
min1 :: forall f a. Ord1 f => f a -> f a -> f a
P purescript-higher-order M Data.Operator.Ord
onIntegrityError :: forall m a. MonadError PGError m => m a -> m a -> m a
P purescript-postgresql-client M Database.PostgreSQL.PG
add :: forall f a. Additive f => Semiring a => f a -> f a -> f a

Vector addition

P purescript-linear M Linear.Vector
alt :: forall f a. Alternative f => f a -> f a -> f a
P purescript-invertible-syntax M Text.Syntax.Classes
dappend :: forall cnt a. Diff cnt => cnt a -> cnt a -> cnt a
P purescript-difference-containers M Containers.Difference
diff :: forall p d a. Affine p d => Ring a => p a -> p a -> d a

The vector from the first point to the second.

P purescript-linear M Linear.Affine
dot :: forall f a. Metric f => Semiring a => f a -> f a -> a

The inner (dot) product of two vectors.

dot (V2 1.0 2.0) (V2 3.0 4.0) = 11.0  -- 1*3 + 2*4
P purescript-linear M Linear.Metric
fix :: forall a. (a -> a) -> a

Fixed point Y combinator

Λ a . (a → a) → a

λ f . (λ x. f (x x)) (λ x . f (x x))

P purescript-birds M Aviary.Birds
fix :: forall a. (a -> a) -> a
P purescript-combinators M Data.Combinators
fromFoldableL :: forall a c f. Foldable f => Consable c => c a -> f a -> c a

Conversion from Foldable to Consable using foldl.

fromFoldableL [] [1,2,3,4]  == [4,3,2,1]
fromFoldableL [0] [1,2,3,4] == [4,3,2,1,0]
P purescript-consable M Data.Consable
fromFoldableR :: forall a c f. Foldable f => Consable c => c a -> f a -> c a

Conversion from Foldable to Consable using foldr.

fromFoldableR [] [1,2,3,4]  == [1,2,3,4]
fromFoldableR [5] [1,2,3,4] == [1,2,3,4,5]
P purescript-consable M Data.Consable
interleave :: forall m a. MonadLogic m => m a -> m a -> m a
P purescript-logic M Control.Monad.Logic.Class
moveBy :: forall p d a. Affine p d => Semiring a => p a -> d a -> p a

Add a vector to a point.

P purescript-linear M Linear.Affine
moveByNeg :: forall p d a. Affine p d => Ring a => p a -> d a -> p a

Subtract a vector from a point.

P purescript-linear M Linear.Affine
qd :: forall f a. Metric f => Ring a => f a -> f a -> a

The squared distance between two vectors.

qd (V2 0.0 0.0) (V2 3.0 4.0) = 25.0
P purescript-linear M Linear.Metric
sub :: forall f a. Additive f => Ring a => f a -> f a -> f a

Vector subtraction

P purescript-linear M Linear.Vector
yup :: forall m a. MonadNope m => m a -> m a -> m a
P purescript-jsinc M Control.Monad.Nope.Class
clamp :: forall a. Ord a => a -> a -> a -> a

Clamp a value between a minimum and a maximum. For example:

let f = clamp 0 10
f (-5) == 0
f 5    == 5
f 15   == 10
P purescript-prelude M Data.Ord
voidLeft :: forall f a b. Functor f => f a -> b -> f b

A version of voidRight with its arguments flipped.

P purescript-prelude M Data.Functor
voidRight :: forall f a b. Functor f => a -> f b -> f a

Ignore the return value of a computation, using the specified return value instead.

P purescript-prelude M Data.Functor
intercalate :: forall f m. Foldable f => Monoid m => m -> f m -> m

Fold a data structure, accumulating values in some Monoid, combining adjacent elements using the specified separator.

For example:

> intercalate ", " ["Lorem", "ipsum", "dolor"]
= "Lorem, ipsum, dolor"

> intercalate "*" ["a", "b", "c"]
= "a*b*c"

> intercalate [1] [[2, 3], [4, 5], [6, 7]]
= [2, 3, 1, 4, 5, 1, 6, 7]
P purescript-foldable-traversable M Data.Foldable
intercalate :: forall f m. Foldable1 f => Semigroup m => m -> f m -> m

Fold a data structure using a Semigroup instance, combining adjacent elements using the specified separator.

P purescript-foldable-traversable M Data.Semigroup.Foldable
surround :: forall f m. Foldable f => Semigroup m => m -> f m -> m

fold but with each element surrounded by some fixed value.

For example:

> surround "*" []
= "*"

> surround "*" ["1"]
= "*1*"

> surround "*" ["1", "2"]
= "*1*2*"

> surround "*" ["1", "2", "3"]
= "*1*2*3*"
P purescript-foldable-traversable M Data.Foldable
peek :: forall s w a. ComonadStore s w => s -> w a -> a
P purescript-transformers M Control.Comonad.Store.Class
seek :: forall s a w. ComonadStore s w => s -> w a -> w a

Reposition the focus at the specified position.

P purescript-transformers M Control.Comonad.Store.Class
track :: forall t w a. ComonadTraced t w => t -> w a -> a
P purescript-transformers M Control.Comonad.Traced.Class
folding :: forall f x y z. Folding f x y z => f -> x -> y -> z
P purescript-heterogeneous M Heterogeneous.Folding
hfoldl :: forall f x a b. HFoldl f x a b => f -> x -> a -> b
P purescript-heterogeneous M Heterogeneous.Folding
hfoldlWithIndex :: forall f x a b. HFoldlWithIndex f x a b => f -> x -> a -> b
P purescript-heterogeneous M Heterogeneous.Folding
mappingWithIndex :: forall f i a b. MappingWithIndex f i a b => f -> i -> a -> b
P purescript-heterogeneous M Heterogeneous.Mapping
resultingWithLength :: forall f n acc x. ResultingWithLength f n acc x => f -> n -> acc -> x
P purescript-heterogeneous M Heterogeneous.Variadic
convertOptionsWithDefaults :: forall t defaults provided all. ConvertOptionsWithDefaults t defaults provided all => t -> defaults -> provided -> all
P purescript-convertable-options M ConvertableOptions
applyTo :: forall f this a b. f -> this -> a -> b

Apply a function to a this object with the given arguments

P purescript-ffi-simple M FFI.Simple.Functions
convertOption :: forall field from to sproxy. ConvertOption field from to => sproxy field -> from -> to
P purescript-web-fetch M Web.Fetch.Request
buildLeaf :: forall e f p v. ElementBuilder e f p v => e -> f p -> v
P purescript-concur-core M Concur.Core.ElementBuilder
filled :: forall m a style. MonadCanvasAction m => CanvasStyle style => style -> m a -> m a

Run a MonadCanvasAction with the given fillStyle, resetting it to the previous value after

P purescript-canvas-action M Graphics.CanvasAction
putCtx :: forall a html ctx. Ctx ctx html => ctx -> html a -> html a
P purescript-chameleon-transformers M Chameleon.Transformers.Ctx.Class
stroked :: forall m a style. MonadCanvasAction m => CanvasStyle style => style -> m a -> m a

Run a MonadCanvasAction with the given strokeStyle, resetting it to the previous value after

P purescript-canvas-action M Graphics.CanvasAction
tellAccum :: forall acc html a. TellAccum acc html => acc -> html a -> html a
P purescript-chameleon-transformers M Chameleon.Transformers.Accum.Class
flipScalarMul :: forall k f. VectorField f k => f k -> k -> f k
P purescript-vectorfield M Data.VectorField
rsingleton :: forall f g s v r. RSingleton f g s => Cons s v () r => Lacks s () => g s -> v -> f r
P purescript-struct M Data.Struct.Singleton.RSingleton
scalarMul :: forall f k. VectorField f k => k -> f k -> f k
  • ∀v in V: one * v == v
  • ∀a b in K, v in V: a * (b .* v) = (a * b) .* v
  • ∀a b in K, v in V:
    • a .* (u + v) = a .* u + a .* v
    • (a + b) .* v = a .* v + b .* v
P purescript-vectorfield M Data.VectorField
singleton :: forall v s r g f. Cons s v () r => Lacks s () => RSingleton f g s => g s -> v -> f r
P purescript-struct M Data.Struct.Singleton
clamp :: forall a. HasGreater a => HasLess a => a -> a -> a -> a

Clamps a value between some bounds. If the lower bound is greater than the upper bound, they will be swapped.

2 :clamp 3 5 -- 3
4 :clamp 3 5 -- 4
6 :clamp 3 5 -- 5
6 :clamp 5 3 -- 5
P purescript-neon M Neon.Helper
cons :: forall t a. Consable t => a -> t a -> t a
P purescript-consable M Data.Consable
cons :: forall f a. Container f => a -> f a -> f a
P purescript-logoot-core M Data.Container
consMax :: forall a f. Foldable f => Ord a => a -> f a -> a
P purescript-liminal M Data.Geometry.BoundingBox
consMin :: forall a f. Foldable f => Ord a => a -> f a -> a
P purescript-liminal M Data.Geometry.BoundingBox
folding :: forall f x y z. Folding f x y z => f -> x -> y -> z
P purescript-heterogenous M Heterogenous.Folding
functorDecorate :: forall b a f. Functor f => Decorate a b => a -> f b -> f a
P purescript-materialize M Materialize.Markup.Decorate
functorDecorateFlipped :: forall b a f. Functor f => Decorate b a => f a -> b -> f b
P purescript-materialize M Materialize.Markup.Decorate
hfoldl :: forall f x a b. HFoldl f x a b => f -> x -> a -> b
P purescript-heterogenous M Heterogenous.Folding
hfoldlWithIndex :: forall f x a b. HFoldlWithIndex f x a b => f -> x -> a -> b
P purescript-heterogenous M Heterogenous.Folding
index :: forall f a b. Representable f a => f b -> (a -> b)
P purescript-functor-vector M Data.Functor.Representable
insert :: forall f a. Container f => Ord a => a -> f a -> f a
P purescript-logoot-core M Data.Container
mappingWithIndex :: forall f i a b. MappingWithIndex f i a b => f -> i -> a -> b
P purescript-heterogenous M Heterogenous.Mapping
new2 :: forall b a2 a1 o. o -> a1 -> a2 -> b
P purescript-ffi-utils M FFI.Util
option :: forall a m. Alternative m => a -> m a -> m a
P purescript-parsers M Text.Parsing.Combinators
replaceInArray :: forall a f. HasUuid a => Functor f => a -> f a -> f a
P purescript-liminal M Classes.HasUuid
scalarDiv :: forall f a. Functor f => EuclideanRing a => f a -> a -> f a

Right scalar division

V2 6.0 9.0 ^/ 3.0 = V2 2.0 3.0
P purescript-linear M Linear.Vector
scalarL :: forall f a. Functor f => Semiring a => a -> f a -> f a

Left scalar multiplication

3.0 *^ V2 1.0 2.0 = V2 3.0 6.0
P purescript-linear M Linear.Vector
scalarR :: forall f a. Functor f => Semiring a => f a -> a -> f a

Right scalar multiplication

V2 1.0 2.0 ^* 3.0 = V2 3.0 6.0
P purescript-linear M Linear.Vector
setValM :: forall m el v. MonadEffect m => HTMLValueContainerOp el v => v -> m el -> m el
P purescript-web-chain M Web.Chain.HTML.Class.HTMLValueContainerOp
snoc :: forall f a. Container f => f a -> a -> f a
P purescript-logoot-core M Data.Container
add :: forall a. Semiring a => a -> a -> a
P purescript-prelude M Data.Semiring
append :: forall a. Semigroup a => a -> a -> a
P purescript-prelude M Data.Semigroup
conj :: forall a. HeytingAlgebra a => a -> a -> a
P purescript-prelude M Data.HeytingAlgebra
const :: forall a b. a -> b -> a

Returns its first argument and ignores its second.

const 1 "hello" = 1

It can also be thought of as creating a function that ignores its argument:

const 1 = \_ -> 1
P purescript-prelude M Data.Function
disj :: forall a. HeytingAlgebra a => a -> a -> a
P purescript-prelude M Data.HeytingAlgebra
div :: forall a. EuclideanRing a => a -> a -> a
P purescript-prelude M Data.EuclideanRing
gcd :: forall a. Eq a => EuclideanRing a => a -> a -> a

The greatest common divisor of two values.

P purescript-prelude M Data.EuclideanRing
genericAdd :: forall a rep. Generic a rep => GenericSemiring rep => a -> a -> a

A Generic implementation of the add member from the Semiring type class.

P purescript-prelude M Data.Semiring.Generic
genericAdd' :: forall a. GenericSemiring a => a -> a -> a
P purescript-prelude M Data.Semiring.Generic
genericAppend :: forall a rep. Generic a rep => GenericSemigroup rep => a -> a -> a

A Generic implementation of the append member from the Semigroup type class.

P purescript-prelude M Data.Semigroup.Generic
genericAppend' :: forall a. GenericSemigroup a => a -> a -> a
P purescript-prelude M Data.Semigroup.Generic
genericConj :: forall a rep. Generic a rep => GenericHeytingAlgebra rep => a -> a -> a

A Generic implementation of the conj member from the HeytingAlgebra type class.

P purescript-prelude M Data.HeytingAlgebra.Generic
genericConj' :: forall a. GenericHeytingAlgebra a => a -> a -> a
P purescript-prelude M Data.HeytingAlgebra.Generic
genericDisj :: forall a rep. Generic a rep => GenericHeytingAlgebra rep => a -> a -> a

A Generic implementation of the disj member from the HeytingAlgebra type class.

P purescript-prelude M Data.HeytingAlgebra.Generic
genericDisj' :: forall a. GenericHeytingAlgebra a => a -> a -> a
P purescript-prelude M Data.HeytingAlgebra.Generic
genericImplies :: forall a rep. Generic a rep => GenericHeytingAlgebra rep => a -> a -> a

A Generic implementation of the implies member from the HeytingAlgebra type class.

P purescript-prelude M Data.HeytingAlgebra.Generic
genericImplies' :: forall a. GenericHeytingAlgebra a => a -> a -> a
P purescript-prelude M Data.HeytingAlgebra.Generic
genericMul :: forall a rep. Generic a rep => GenericSemiring rep => a -> a -> a

A Generic implementation of the mul member from the Semiring type class.

P purescript-prelude M Data.Semiring.Generic
genericMul' :: forall a. GenericSemiring a => a -> a -> a
P purescript-prelude M Data.Semiring.Generic
genericSub :: forall a rep. Generic a rep => GenericRing rep => a -> a -> a

A Generic implementation of the sub member from the Ring type class.

P purescript-prelude M Data.Ring.Generic
genericSub' :: forall a. GenericRing a => a -> a -> a
P purescript-prelude M Data.Ring.Generic
implies :: forall a. HeytingAlgebra a => a -> a -> a
P purescript-prelude M Data.HeytingAlgebra
lcm :: forall a. Eq a => EuclideanRing a => a -> a -> a

The least common multiple of two values.

P purescript-prelude M Data.EuclideanRing
leftDiv :: forall a. DivisionRing a => a -> a -> a

Left division, defined as leftDiv a b = recip b * a. Left and right division are distinct in this module because a DivisionRing is not necessarily commutative.

If the type a is also a EuclideanRing, then this function is equivalent to div from the EuclideanRing class. When working abstractly, div should generally be preferred, unless you know that you need your code to work with noncommutative rings.

P purescript-prelude M Data.DivisionRing
max :: forall a. Ord a => a -> a -> a

Take the maximum of two values. If they are considered equal, the first argument is chosen.

P purescript-prelude M Data.Ord
min :: forall a. Ord a => a -> a -> a

Take the minimum of two values. If they are considered equal, the first argument is chosen.

P purescript-prelude M Data.Ord
mod :: forall a. EuclideanRing a => a -> a -> a
P purescript-prelude M Data.EuclideanRing
mul :: forall a. Semiring a => a -> a -> a
P purescript-prelude M Data.Semiring
rightDiv :: forall a. DivisionRing a => a -> a -> a

Right division, defined as rightDiv a b = a * recip b. Left and right division are distinct in this module because a DivisionRing is not necessarily commutative.

If the type a is also a EuclideanRing, then this function is equivalent to div from the EuclideanRing class. When working abstractly, div should generally be preferred, unless you know that you need your code to work with noncommutative rings.

P purescript-prelude M Data.DivisionRing
sub :: forall a. Ring a => a -> a -> a
P purescript-prelude M Data.Ring
duplicate :: forall a w. Extend w => w a -> w (w a)

Duplicate a comonadic context.

duplicate is dual to Control.Bind.join.

P purescript-control M Control.Extend
extract :: forall w a. Comonad w => w a -> a
P purescript-control M Control.Comonad
and :: forall a f. Foldable f => HeytingAlgebra a => f a -> a

The conjunction of all the values in a data structure. When specialized to Boolean, this function will test whether all of the values in a data structure are true.

P purescript-foldable-traversable M Data.Foldable
fold :: forall f m. Foldable f => Monoid m => f m -> m

Fold a data structure, accumulating values in some Monoid.

P purescript-foldable-traversable M Data.Foldable
fold1 :: forall t m. Foldable1 t => Semigroup m => t m -> m

Fold a data structure, accumulating values in some Semigroup.

P purescript-foldable-traversable M Data.Semigroup.Foldable
length :: forall a b f. Foldable f => Semiring b => f a -> b

Returns the size/length of a finite structure. Optimized for structures that are similar to cons-lists, because there is no general way to do better.

P purescript-foldable-traversable M Data.Foldable
maximum :: forall f a. Ord a => Foldable1 f => f a -> a
P purescript-foldable-traversable M Data.Semigroup.Foldable
minimum :: forall f a. Ord a => Foldable1 f => f a -> a
P purescript-foldable-traversable M Data.Semigroup.Foldable
or :: forall a f. Foldable f => HeytingAlgebra a => f a -> a

The disjunction of all the values in a data structure. When specialized to Boolean, this function will test whether any of the values in a data structure is true.

P purescript-foldable-traversable M Data.Foldable
product :: forall a f. Foldable f => Semiring a => f a -> a

Find the product of the numeric values in a data structure.

P purescript-foldable-traversable M Data.Foldable
sum :: forall a f. Foldable f => Semiring a => f a -> a

Find the sum of the numeric values in a data structure.

P purescript-foldable-traversable M Data.Foldable
forever :: forall m a b. MonadRec m => m a -> m b

forever runs an action indefinitely, using the MonadRec instance to ensure constant stack usage.

For example:

main = forever $ trace "Hello, World!"
P purescript-tailrec M Control.Monad.Rec.Class
proof :: forall a b p. TypeEquals a b => p a -> p b
P purescript-type-equality M Type.Equality
elements :: forall m f a. MonadGen m => Foldable1 f => f a -> m a

Creates a generator that outputs a value chosen from a selection with uniform probability.

P purescript-gen M Control.Monad.Gen
unfoldable :: forall m f a. MonadRec m => MonadGen m => Unfoldable f => m a -> m (f a)

Creates a generator that produces unfoldable structures based on an existing generator for the elements.

The size of the unfoldable will be determined by the current size state for the generator. To generate an unfoldable structure of a particular size, use the resize function from the MonadGen class first.

P purescript-gen M Control.Monad.Gen
enumFromTo :: forall a u. Enum a => Unfoldable1 u => a -> a -> u a

Returns a contiguous sequence of elements from the first value to the second value (inclusive).

enumFromTo 0 3 = [0, 1, 2, 3]
enumFromTo 'c' 'a' = ['c', 'b', 'a']

The example shows Array return values, but the result can be any type with an Unfoldable1 instance.

P purescript-enums M Data.Enum
coerce :: forall f a b. Contravariant f => Functor f => f a -> f b
P purescript-contravariant M Data.Functor.Contravariant
ask :: forall e w a. ComonadAsk e w => w a -> e
P purescript-transformers M Control.Comonad.Env.Class
pos :: forall s w a. ComonadStore s w => w a -> s
P purescript-transformers M Control.Comonad.Store.Class
inj :: forall f g a. Inject f g => f a -> g a
P purescript-functors M Data.Functor.Coproduct.Inject
unwrapCofree :: forall f w a. ComonadCofree f w => w a -> f (w a)
P purescript-free M Control.Comonad.Cofree.Class
sans :: forall m a b. At m a b => a -> m -> m
P purescript-profunctor-lenses M Data.Lens.At
fork :: forall f m a. MonadFork f m => m a -> m (f a)
P purescript-fork M Control.Monad.Fork.Class
join :: forall f m a. MonadFork f m => f a -> m a
P purescript-fork M Control.Monad.Fork.Class
suspend :: forall f m a. MonadFork f m => m a -> m (f a)
P purescript-fork M Control.Monad.Fork.Class
uninterruptible :: forall e f m a. MonadBracket e f m => m a -> m a
P purescript-fork M Control.Monad.Fork.Class
hmap :: forall f a b. HMap f a b => f -> a -> b
P purescript-heterogeneous M Heterogeneous.Mapping

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