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Identity overview

Added in v2.0.0


Table of contents


Alt

alt

Identifies an associative operation on a type constructor. It is similar to Semigroup, except that it applies to types of kind * -> *.

Signature

export declare const alt: <A>(that: () => A) => (fa: A) => A

Added in v2.0.0

altW

Less strict version of alt.

Signature

export declare const altW: <B>(that: () => B) => <A>(fa: A) => B | A

Added in v2.9.0

Apply

ap

Apply a function to an argument under a type constructor.

Signature

export declare const ap: <A>(fa: A) => <B>(fab: (a: A) => B) => B

Added in v2.0.0

Extend

extend

Signature

export declare const extend: <A, B>(f: (wa: A) => B) => (wa: A) => B

Added in v2.0.0

Extract

extract

Signature

export declare const extract: <A>(wa: A) => A

Added in v2.6.2

Foldable

foldMap

Signature

export declare const foldMap: <M>(M: Monoid<M>) => <A>(f: (a: A) => M) => (fa: A) => M

Added in v2.0.0

reduce

Signature

export declare const reduce: <A, B>(b: B, f: (b: B, a: A) => B) => (fa: A) => B

Added in v2.0.0

reduceRight

Signature

export declare const reduceRight: <A, B>(b: B, f: (a: A, b: B) => B) => (fa: A) => B

Added in v2.0.0

Functor

map

map can be used to turn functions (a: A) => B into functions (fa: F<A>) => F<B> whose argument and return types use the type constructor F to represent some computational context.

Signature

export declare const map: <A, B>(f: (a: A) => B) => (fa: A) => B

Added in v2.0.0

Monad

chain

Composes computations in sequence, using the return value of one computation to determine the next computation.

Signature

export declare const chain: <A, B>(f: (a: A) => B) => (ma: A) => B

Added in v2.0.0

Pointed

of

Signature

export declare const of: <A>(a: A) => A

Added in v2.0.0

combinators

apFirst

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

Derivable from Apply.

Signature

export declare const apFirst: <B>(second: B) => <A>(first: A) => A

Added in v2.0.0

apSecond

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

Derivable from Apply.

Signature

export declare const apSecond: <B>(second: B) => <A>(first: A) => B

Added in v2.0.0

chainFirst

Composes computations in sequence, using the return value of one computation to determine the next computation and keeping only the result of the first.

Derivable from Chain.

Signature

export declare const chainFirst: <A, B>(f: (a: A) => B) => (first: A) => A

Added in v2.0.0

duplicate

Derivable from Extend.

Signature

export declare const duplicate: <A>(ma: A) => A

Added in v2.0.0

flap

Derivable from Functor.

Signature

export declare const flap: <A>(a: A) => <B>(fab: (a: A) => B) => B

Added in v2.10.0

flatten

Derivable from Chain.

Signature

export declare const flatten: <A>(mma: A) => A

Added in v2.0.0

instances

Alt

Signature

export declare const Alt: Alt1<'Identity'>

Added in v2.7.0

Applicative

Signature

export declare const Applicative: Applicative1<'Identity'>

Added in v2.7.0

Apply

Signature

export declare const Apply: Apply1<'Identity'>

Added in v2.10.0

Chain

Signature

export declare const Chain: Chain1<'Identity'>

Added in v2.10.0

ChainRec

Signature

export declare const ChainRec: ChainRec1<'Identity'>

Added in v2.7.0

Comonad

Signature

export declare const Comonad: Comonad1<'Identity'>

Added in v2.7.0

Foldable

Signature

export declare const Foldable: Foldable1<'Identity'>

Added in v2.7.0

Functor

Signature

export declare const Functor: Functor1<'Identity'>

Added in v2.7.0

Monad

Signature

export declare const Monad: Monad1<'Identity'>

Added in v2.7.0

Pointed

Signature

export declare const Pointed: Pointed1<'Identity'>

Added in v2.10.0

Traversable

Signature

export declare const Traversable: Traversable1<'Identity'>

Added in v2.7.0

URI

Signature

export declare const URI: 'Identity'

Added in v2.0.0

URI (type alias)

Signature

export type URI = typeof URI

Added in v2.0.0

getEq

Signature

export declare const getEq: <A>(E: Eq<A>) => Eq<A>

Added in v2.0.0

getShow

Signature

export declare const getShow: <A>(S: Show<A>) => Show<A>

Added in v2.0.0

identity

Use small, specific instances instead.

Signature

export declare const identity: Monad1<'Identity'> &
  Foldable1<'Identity'> &
  Traversable1<'Identity'> &
  Alt1<'Identity'> &
  Comonad1<'Identity'> &
  ChainRec1<'Identity'>

Added in v2.0.0

model

Identity (type alias)

Signature

export type Identity<A> = A

Added in v2.0.0

utils

Do

Signature

export declare const Do: {}

Added in v2.9.0

apS

Signature

export declare const apS: <N, A, B>(
  name: Exclude<N, keyof A>,
  fb: B
) => (fa: A) => { readonly [K in N | keyof A]: K extends keyof A ? A[K] : B }

Added in v2.8.0

bind

Signature

export declare const bind: <N, A, B>(
  name: Exclude<N, keyof A>,
  f: (a: A) => B
) => (ma: A) => { readonly [K in N | keyof A]: K extends keyof A ? A[K] : B }

Added in v2.8.0

bindTo

Signature

export declare const bindTo: <N>(name: N) => <A>(fa: A) => { readonly [K in N]: A }

Added in v2.8.0

sequence

Signature

export declare const sequence: Sequence1<'Identity'>

Added in v2.6.3

traverse

Signature

export declare const traverse: PipeableTraverse1<'Identity'>

Added in v2.6.3