effect-io-ai

Package: effect
Module: TxSubscriptionRef

TxSubscriptionRef.update

Updates the value of the TxSubscriptionRef using a function and publishes the new value to all subscribers.

When to use

Use to derive the next TxSubscriptionRef value from the current value and publish it.

Example (Updating a value)

import { Effect, TxSubscriptionRef } from "effect"

const program = Effect.gen(function*() {
  const ref = yield* TxSubscriptionRef.make(5)
  yield* TxSubscriptionRef.update(ref, (n) => n * 2)
  console.log(yield* TxSubscriptionRef.get(ref)) // 10
})

See

• set for replacing the value directly
• updateAndGet for returning the new value after the update

Signature

declare const update: { <A>(f: (current: A) => A): (self: TxSubscriptionRef<A>) => Effect.Effect<void>; <A>(self: TxSubscriptionRef<A>, f: (current: A) => A): Effect.Effect<void>; }

Source

Since v3.10.0