(
options:
| {
readonly capacity: "unbounded"
readonly replay?: number | undefined
}
| {
readonly capacity: number
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined
readonly replay?: number | undefined
}
): <A, E, R>(
self: Stream<A, E, R>
) => Effect.Effect<Stream<A, E>, never, Scope.Scope | R>
<A, E, R>(
self: Stream<A, E, R>,
options:
| {
readonly capacity: "unbounded"
readonly replay?: number | undefined
}
| {
readonly capacity: number
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined
readonly replay?: number | undefined
}
): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>Creates a PubSub-backed stream that multicasts the source to all subscribers.
Details
The returned stream is scoped and uses the provided PubSub capacity and replay settings.
Example (Broadcasting a stream)
import { Console, Effect, Stream } from "effect"
const program = Effect.scoped(
Effect.gen(function* () {
const broadcasted = yield* Stream.broadcast(Stream.fromArray([1, 2, 3]), {
capacity: 8,
replay: 3
})
const [left, right] = yield* Effect.all([
Stream.runCollect(broadcasted),
Stream.runCollect(broadcasted)
], { concurrency: "unbounded" })
yield* Console.log([left, right])
})
)
Effect.runPromise(program)
// Output: [[1, 2, 3], [1, 2, 3]]export const const broadcast: {
(
options:
| {
readonly capacity: "unbounded"
readonly replay?: number | undefined
}
| {
readonly capacity: number
readonly strategy?:
| "sliding"
| "dropping"
| "suspend"
| undefined
readonly replay?: number | undefined
}
): <A, E, R>(
self: Stream<A, E, R>
) => Effect.Effect<
Stream<A, E>,
never,
Scope.Scope | R
>
<A, E, R>(
self: Stream<A, E, R>,
options:
| {
readonly capacity: "unbounded"
readonly replay?: number | undefined
}
| {
readonly capacity: number
readonly strategy?:
| "sliding"
| "dropping"
| "suspend"
| undefined
readonly replay?: number | undefined
}
): Effect.Effect<
Stream<A, E>,
never,
Scope.Scope | R
>
}
Creates a PubSub-backed stream that multicasts the source to all subscribers.
Details
The returned stream is scoped and uses the provided PubSub capacity and replay settings.
Example (Broadcasting a stream)
import { Console, Effect, Stream } from "effect"
const program = Effect.scoped(
Effect.gen(function* () {
const broadcasted = yield* Stream.broadcast(Stream.fromArray([1, 2, 3]), {
capacity: 8,
replay: 3
})
const [left, right] = yield* Effect.all([
Stream.runCollect(broadcasted),
Stream.runCollect(broadcasted)
], { concurrency: "unbounded" })
yield* Console.log([left, right])
})
)
Effect.runPromise(program)
// Output: [[1, 2, 3], [1, 2, 3]]
broadcast: {
(
options: | {
readonly capacity: "unbounded"
readonly replay?: number | undefined
}
| {
readonly capacity: number
readonly strategy?:
| "sliding"
| "dropping"
| "suspend"
| undefined
readonly replay?: number | undefined
}
capacity: "unbounded"capacity: "unbounded"
readonly replay?: number | undefinedreplay?: number | undefined
} | {
readonly capacity: numbercapacity: number
readonly strategy?: | "sliding"
| "dropping"
| "suspend"
| undefined
replay?: number | undefinedreplay?: number | undefined
}
): <function (type parameter) A in <A, E, R>(self: Stream<A, E, R>): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>A, function (type parameter) E in <A, E, R>(self: Stream<A, E, R>): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>E, function (type parameter) R in <A, E, R>(self: Stream<A, E, R>): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>R>(self: Stream<A, E, R>(parameter) self: {
channel: Channel.Channel<Arr.NonEmptyReadonlyArray<A>, E, void, unknown, unknown, unknown, R>;
pipe: { <A>(this: A): A; <A, B = never>(this: A, ab: (_: A) => B): B; <A, B = never, C = never>(this: A, ab: (_: A) => B, bc: (_: B) => C): C; <A, B = never, C = never, D = never>(this: A, ab: (_: A) => B, bc: (_: B) => C, cd: (_: C) => D): D; <…;
}
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) A in <A, E, R>(self: Stream<A, E, R>): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>A, function (type parameter) E in <A, E, R>(self: Stream<A, E, R>): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>E, function (type parameter) R in <A, E, R>(self: Stream<A, E, R>): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>R>) => import EffectEffect.interface Effect<out A, out E = never, out R = never>The Effect interface defines a value that lazily describes a workflow or
job. The workflow requires some context R, and may fail with an error of
type E, or succeed with a value of type A.
When to use
Use when you need to represent a lazy, composable workflow that can require
services, fail with a typed error, or succeed with a typed value.
Details
Effect values model resourceful interaction with the outside world,
including synchronous, asynchronous, concurrent, and parallel interaction.
They use a fiber-based concurrency model, with built-in support for
scheduling, fine-grained interruption, structured concurrency, and high
scalability.
To run an Effect value, you need a Runtime, which is a type that is
capable of executing Effect values.
Effect<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) A in <A, E, R>(self: Stream<A, E, R>): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>A, function (type parameter) E in <A, E, R>(self: Stream<A, E, R>): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>E>, never, import ScopeScope.Scope | function (type parameter) R in <A, E, R>(self: Stream<A, E, R>): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>R>
<function (type parameter) A in <A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>
function (type parameter) E in <A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>
function (type parameter) R in <A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>
self: Stream<A, E, R>(parameter) self: {
channel: Channel.Channel<Arr.NonEmptyReadonlyArray<A>, E, void, unknown, unknown, unknown, R>;
pipe: { <A>(this: A): A; <A, B = never>(this: A, ab: (_: A) => B): B; <A, B = never, C = never>(this: A, ab: (_: A) => B, bc: (_: B) => C): C; <A, B = never, C = never, D = never>(this: A, ab: (_: A) => B, bc: (_: B) => C, cd: (_: C) => D): D; <…;
}
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) A in <A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>
function (type parameter) E in <A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>
function (type parameter) R in <A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>
options: | {
readonly capacity: "unbounded"
readonly replay?: number | undefined
}
| {
readonly capacity: number
readonly strategy?:
| "sliding"
| "dropping"
| "suspend"
| undefined
readonly replay?: number | undefined
}
capacity: "unbounded"capacity: "unbounded"
readonly replay?: number | undefinedreplay?: number | undefined
} | {
readonly capacity: numbercapacity: number
readonly strategy?: | "sliding"
| "dropping"
| "suspend"
| undefined
replay?: number | undefinedreplay?: number | undefined
}
): import EffectEffect.interface Effect<out A, out E = never, out R = never>The Effect interface defines a value that lazily describes a workflow or
job. The workflow requires some context R, and may fail with an error of
type E, or succeed with a value of type A.
When to use
Use when you need to represent a lazy, composable workflow that can require
services, fail with a typed error, or succeed with a typed value.
Details
Effect values model resourceful interaction with the outside world,
including synchronous, asynchronous, concurrent, and parallel interaction.
They use a fiber-based concurrency model, with built-in support for
scheduling, fine-grained interruption, structured concurrency, and high
scalability.
To run an Effect value, you need a Runtime, which is a type that is
capable of executing Effect values.
Effect<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) A in <A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>
function (type parameter) E in <A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>
import ScopeScope.Scope | function (type parameter) R in <A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>
dual<(...args: Array<any>) => any, <A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}) => Effect.Effect<Stream<A, E>, never, Scope.Scope | R>>(arity: 2, body: <A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}) => Effect.Effect<Stream<A, E>, never, Scope.Scope | R>): ((...args: Array<any>) => any) & (<A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}) => Effect.Effect<Stream<A, E>, never, Scope.Scope | R>) (+1 overload)
Creates a function that can be called in data-first style or data-last
(pipe-friendly) style.
When to use
Use to expose one implementation through both direct and pipe-friendly
call styles.
Details
Pass either the arity of the uncurried function or a predicate that decides
whether the current call is data-first. Arity is the common case. Use a
predicate when optional arguments make arity ambiguous.
Example (Selecting data-first or data-last style by arity)
import { Function, pipe } from "effect"
const sum = Function.dual<
(that: number) => (self: number) => number,
(self: number, that: number) => number
>(2, (self, that) => self + that)
console.log(sum(2, 3)) // 5
console.log(pipe(2, sum(3))) // 5
Example (Defining overloads with call signatures)
import { Function, pipe } from "effect"
const sum: {
(that: number): (self: number) => number
(self: number, that: number): number
} = Function.dual(2, (self: number, that: number): number => self + that)
console.log(sum(2, 3)) // 5
console.log(pipe(2, sum(3))) // 5
Example (Selecting data-first or data-last style with a predicate)
import { Function, pipe } from "effect"
const sum = Function.dual<
(that: number) => (self: number) => number,
(self: number, that: number) => number
>(
(args) => args.length === 2,
(self, that) => self + that
)
console.log(sum(2, 3)) // 5
console.log(pipe(2, sum(3))) // 5
dual(2, <function (type parameter) A in <A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>
function (type parameter) E in <A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>
function (type parameter) R in <A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>
self: Stream<A, E, R>(parameter) self: {
channel: Channel.Channel<Arr.NonEmptyReadonlyArray<A>, E, void, unknown, unknown, unknown, R>;
pipe: { <A>(this: A): A; <A, B = never>(this: A, ab: (_: A) => B): B; <A, B = never, C = never>(this: A, ab: (_: A) => B, bc: (_: B) => C): C; <A, B = never, C = never, D = never>(this: A, ab: (_: A) => B, bc: (_: B) => C, cd: (_: C) => D): D; <…;
}
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) A in <A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>
function (type parameter) E in <A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>
function (type parameter) R in <A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>
options: | {
readonly capacity: "unbounded"
readonly replay?: number | undefined
}
| {
readonly capacity: number
readonly strategy?:
| "sliding"
| "dropping"
| "suspend"
| undefined
readonly replay?: number | undefined
}
capacity: "unbounded"capacity: "unbounded"
readonly replay?: number | undefinedreplay?: number | undefined
} | {
readonly capacity: numbercapacity: number
readonly strategy?: | "sliding"
| "dropping"
| "suspend"
| undefined
replay?: number | undefinedreplay?: number | undefined
}
): import EffectEffect.interface Effect<out A, out E = never, out R = never>The Effect interface defines a value that lazily describes a workflow or
job. The workflow requires some context R, and may fail with an error of
type E, or succeed with a value of type A.
When to use
Use when you need to represent a lazy, composable workflow that can require
services, fail with a typed error, or succeed with a typed value.
Details
Effect values model resourceful interaction with the outside world,
including synchronous, asynchronous, concurrent, and parallel interaction.
They use a fiber-based concurrency model, with built-in support for
scheduling, fine-grained interruption, structured concurrency, and high
scalability.
To run an Effect value, you need a Runtime, which is a type that is
capable of executing Effect values.
Effect<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) A in <A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>
function (type parameter) E in <A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>
import ScopeScope.Scope | function (type parameter) R in <A, E, R>(self: Stream<A, E, R>, options: {
readonly capacity: "unbounded";
readonly replay?: number | undefined;
} | {
readonly capacity: number;
readonly strategy?: "sliding" | "dropping" | "suspend" | undefined;
readonly replay?: number | undefined;
}): Effect.Effect<Stream<A, E>, never, Scope.Scope | R>
import EffectEffect.const map: {
<A, B>(f: (a: A) => B): <E, R>(
self: Effect<A, E, R>
) => Effect<B, E, R>
<A, E, R, B>(
self: Effect<A, E, R>,
f: (a: A) => B
): Effect<B, E, R>
}
const toPubSubTake: {
(
options:
| {
readonly capacity: "unbounded"
readonly replay?: number | undefined
}
| {
readonly capacity: number
readonly strategy?:
| "dropping"
| "sliding"
| "suspend"
| undefined
readonly replay?: number | undefined
}
): <A, E, R>(
self: Stream<A, E, R>
) => Effect.Effect<
PubSub.PubSub<Take.Take<A, E>>,
never,
R | Scope.Scope
>
<A, E, R>(
self: Stream<A, E, R>,
options:
| {
readonly capacity: "unbounded"
readonly replay?: number | undefined
}
| {
readonly capacity: number
readonly strategy?:
| "dropping"
| "sliding"
| "suspend"
| undefined
readonly replay?: number | undefined
}
): Effect.Effect<
PubSub.PubSub<Take.Take<A, E>>,
never,
R | Scope.Scope
>
}
self: Stream<A, E, R>(parameter) self: {
channel: Channel.Channel<Arr.NonEmptyReadonlyArray<A>, E, void, unknown, unknown, unknown, R>;
pipe: { <A>(this: A): A; <A, B = never>(this: A, ab: (_: A) => B): B; <A, B = never, C = never>(this: A, ab: (_: A) => B, bc: (_: B) => C): C; <A, B = never, C = never, D = never>(this: A, ab: (_: A) => B, bc: (_: B) => C, cd: (_: C) => D): D; <…;
}
options: | {
readonly capacity: "unbounded"
readonly replay?: number | undefined
}
| {
readonly capacity: number
readonly strategy?:
| "sliding"
| "dropping"
| "suspend"
| undefined
readonly replay?: number | undefined
}
const fromPubSubTake: <A, E>(
pubsub: PubSub.PubSub<Take.Take<A, E>>
) => Stream<A, E>
Creates a stream from a PubSub of Take values.
Details
Take values include end and failure signals.
Example (Creating a stream from PubSub takes)
import { Console, Effect, Exit, PubSub, Stream, Take } from "effect"
const program = Effect.gen(function*() {
const pubsub = yield* PubSub.unbounded<Take.Take<number, string>>({
replay: 3
})
yield* PubSub.publish(pubsub, [1])
yield* PubSub.publish(pubsub, [2])
yield* PubSub.publish(pubsub, Exit.succeed<void>(undefined))
const values = yield* Stream.fromPubSubTake(pubsub).pipe(Stream.runCollect)
yield* Console.log(values)
})
Effect.runPromise(program)
// Output: [ 1, 2 ]
fromPubSubTake))