Package: effect
Module: Effect
Combines two effects sequentially and applies a function to their results to produce a single value.
When to use
Use when you need to run two effects sequentially and combine their results with a function instead of keeping the results as a tuple.
Details
Concurrency:
By default, the effects are run sequentially. To execute them concurrently,
use the { concurrent: true } option.
Example (Combining two success values with a function)
import { Effect } from "effect"
const task1 = Effect.succeed(1).pipe(
Effect.delay("200 millis"),
Effect.tap(Effect.log("task1 done"))
)
const task2 = Effect.succeed("hello").pipe(
Effect.delay("100 millis"),
Effect.tap(Effect.log("task2 done"))
)
const task3 = Effect.zipWith(
task1,
task2,
// Combines results into a single value
(number, string) => number + string.length
)
Effect.runPromise(task3).then(console.log)
// Output:
// timestamp=... level=INFO fiber=#3 message="task1 done"
// timestamp=... level=INFO fiber=#2 message="task2 done"
// 6
Signature
declare const zipWith: { <A2, E2, R2, A, B>(that: Effect<A2, E2, R2>, f: (a: A, b: A2) => B, options?: { readonly concurrent?: boolean | undefined; }): <E, R>(self: Effect<A, E, R>) => Effect<B, E2 | E, R2 | R>; <A, E, R, A2, E2, R2, B>(self: Effect<A, E, R>, that: Effect<A2, E2, R2>, f: (a: A, b: A2) => B, options?: { readonly concurrent?: boolean | undefined; }): Effect<B, E2 | E, R2 | R>; }
Since v2.0.0