- sequenceArray
- traverseArray
- traverseArrayWithIndex
- traverseReadonlyArrayWithIndex
- traverseReadonlyNonEmptyArrayWithIndex
- ApT
- ap
- apFirst
- apSecond
- do
fromIO(deprecated)getMonoid(deprecated)getSemigroup(deprecated)io(deprecated)- let
export declare const Applicative: Applicative1<URI>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const Apply: Apply1<URI>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const Chain: chainable.Chain1<URI>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const ChainRec: ChainRec1<URI>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const FromIO: FromIO1<URI>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const Functor: Functor1<URI>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const Monad: Monad1<URI>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const MonadIO: MonadIO1<URI>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const Pointed: Pointed1<URI>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
Composes computations in sequence, using the return value of one computation to determine the next computation and keeping only the result of the first.
export declare const tap: {
<A, _>(self: IO<A>, f: (a: A) => IO<_>): IO<A>
<A, _>(f: (a: A) => IO<_>): (self: IO<A>) => IO<A>
}
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const of: <A>(a: A) => IO<A>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const Do: IO<{}>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const apS: <N extends string, A, B>(
name: Exclude<N, keyof A>,
fb: IO<B>,
) => (fa: IO<A>) => IO<{ readonly [K in N | keyof A]: K extends keyof A ? A[K] : B }>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const bind: <N extends string, A, B>(
name: Exclude<N, keyof A>,
f: (a: A) => IO<B>,
) => (ma: IO<A>) => IO<{ readonly [K in N | keyof A]: K extends keyof A ? A[K] : B }>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const bindTo: <N extends string>(name: N) => <A>(fa: IO<A>) => IO<{ readonly [K in N]: A }>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const chainRec: ChainRec1<URI>['chainRec']
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
Alias of flatMap
.
export declare const chain: <A, B>(f: (a: A) => IO<B>) => (ma: IO<A>) => IO<B>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
Alias of tap
.
export declare const chainFirst: <A, B>(f: (a: A) => IO<B>) => (first: IO<A>) => IO<A>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
Maps the value to the specified constant value.
export declare const as: {
<A>(a: A): <_>(self: IO<_>) => IO<A>
<_, A>(self: IO<_>, a: A): IO<A>
}
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
Maps the value to the void constant value.
export declare const asUnit: <_>(self: IO<_>) => IO<void>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const flap: <A>(a: A) => <B>(fab: IO<(a: A) => B>) => IO<B>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
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.
export declare const map: <A, B>(f: (a: A) => B) => (fa: IO<A>) => IO<B>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export interface IO<A> {
(): A
}
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const flatMap: {
<A, B>(f: (a: A) => IO<B>): (ma: IO<A>) => IO<B>
<A, B>(ma: IO<A>, f: (a: A) => IO<B>): IO<B>
}
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const flatten: <A>(mma: IO<IO<A>>) => IO<A>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
Equivalent to ReadonlyArray#sequence(Applicative)
.
export declare const sequenceArray: <A>(arr: ReadonlyArray<IO<A>>) => IO<ReadonlyArray<A>>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
Equivalent to ReadonlyArray#traverse(Applicative)
.
export declare const traverseArray: <A, B>(f: (a: A) => IO<B>) => (as: readonly A[]) => IO<readonly B[]>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
Equivalent to ReadonlyArray#traverseWithIndex(Applicative)
.
export declare const traverseArrayWithIndex: <A, B>(
f: (index: number, a: A) => IO<B>,
) => (as: ReadonlyArray<A>) => IO<ReadonlyArray<B>>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
Equivalent to ReadonlyArray#traverseWithIndex(Applicative)
.
export declare const traverseReadonlyArrayWithIndex: <A, B>(
f: (index: number, a: A) => IO<B>,
) => (as: readonly A[]) => IO<readonly B[]>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
Equivalent to ReadonlyNonEmptyArray#traverseWithIndex(Applicative)
.
export declare const traverseReadonlyNonEmptyArrayWithIndex: <A, B>(
f: (index: number, a: A) => IO<B>,
) => (as: ReadonlyNonEmptyArray<A>) => IO<ReadonlyNonEmptyArray<B>>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export type URI = typeof URI
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const URI = 'IO'
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const ApT: IO<readonly []>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const ap: <A>(fa: IO<A>) => <B>(fab: IO<(a: A) => B>) => IO<B>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
Combine two effectful actions, keeping only the result of the first.
export declare const apFirst: <B>(second: IO<B>) => <A>(first: IO<A>) => IO<A>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
Combine two effectful actions, keeping only the result of the second.
export declare const apSecond: <B>(second: IO<B>) => <A>(first: IO<A>) => IO<B>
- Added in 0.1.0
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const do_: <MA extends IOIterable<any>, A>(
yieldFunction: (unwrap: <A>(ma: IO<A>) => IOIterable<A>) => Generator<MA, A>,
) => IO<A>
export declare const fromIO: <A>(fa: IO<A>) => IO<A>
- Added in 0.1.0
- Deprecated
- MIT – Copyright (c) 2017-present Giulio Canti
Use getApplicativeMonoid
instead.
export declare const getMonoid: <A>(M: Monoid<A>) => Monoid<IO<A>>
- Added in 0.1.0
- Deprecated
- MIT – Copyright (c) 2017-present Giulio Canti
Use getApplySemigroup
instead.
export declare const getSemigroup: <A>(S: Semigroup<A>) => Semigroup<IO<A>>
- Added in 0.1.0
- Deprecated
- MIT – Copyright (c) 2017-present Giulio Canti
This instance is deprecated, use small, specific instances instead. For example if a function needs a Functor
instance, pass IO.Functor
instead of IO.io
(where IO
is from import IO from 'fp-ts/IO'
)
export declare const io: Monad1<URI> & MonadIO1<URI> & ChainRec1<URI>
- Added in 0.1.0
- Deprecated
- MIT – Copyright (c) 2017-present Giulio Canti
export declare const let_: <N extends string, A, B>(
name: Exclude<N, keyof A>,
f: (a: A) => B,
) => (fa: IO<A>) => IO<{ readonly [K in N | keyof A]: K extends keyof A ? A[K] : B }>