<const As extends ReadonlyArray<any>>(...values: As): Stream<As[number]>Creates a stream from a sequence of values.
Example (Creating a stream from a sequence of values)
import { Console, Effect, Stream } from "effect"
const stream = Stream.make(1, 2, 3)
const program = Effect.gen(function*() {
const values = yield* Stream.runCollect(stream)
yield* Console.log(values) // [ 1, 2, 3 ]
})
Effect.runPromise(program)constructors
Source effect/Stream.ts:8501 lines
export const const make: <
As extends ReadonlyArray<any>
>(
...values: As
) => Stream<As[number]>
Creates a stream from a sequence of values.
Example (Creating a stream from a sequence of values)
import { Console, Effect, Stream } from "effect"
const stream = Stream.make(1, 2, 3)
const program = Effect.gen(function*() {
const values = yield* Stream.runCollect(stream)
yield* Console.log(values) // [ 1, 2, 3 ]
})
Effect.runPromise(program)
make = <const function (type parameter) As in <const As extends ReadonlyArray<any>>(...values: As): Stream<As[number]>As extends interface ReadonlyArray<T>ReadonlyArray<any>>(...values: const As extends ReadonlyArray<any>values: function (type parameter) As in <const As extends ReadonlyArray<any>>(...values: As): Stream<As[number]>As): interface Stream<out A, out E = never, out R = never>A Stream<A, E, R> describes a program that can emit many A values, fail
with E, and require R.
Details
Streams are pull-based with backpressure and emit chunks to amortize effect
evaluation. They support monadic composition and error handling similar to
Effect, adapted for multiple values.
Example (Creating and consuming streams)
import { Console, Effect, Stream } from "effect"
const program = Effect.gen(function*() {
yield* Stream.make(1, 2, 3).pipe(
Stream.map((n) => n * 2),
Stream.runForEach((n) => Console.log(n))
)
})
Effect.runPromise(program)
// Output:
// 2
// 4
// 6
Stream<function (type parameter) As in <const As extends ReadonlyArray<any>>(...values: As): Stream<As[number]>As[number]> => const fromArray: <A>(
array: ReadonlyArray<A>
) => Stream<A>
Creates a stream from an array of values.
Example (Creating a stream from an array of values)
import { Console, Effect, Stream } from "effect"
const program = Effect.gen(function*() {
const stream = Stream.fromArray([1, 2, 3])
const values = yield* Stream.runCollect(stream)
yield* Console.log(values)
})
Effect.runPromise(program)
// Output: [ 1, 2, 3 ]
fromArray(values: const As extends ReadonlyArray<any>values)