Effect 3.13 has been released! This release includes a number of new features and improvements. Here’s a summary of what’s new:
Schema.standardSchemaV1
This API allows you to generate a Standard Schema v1 object from an Effect Schema.
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import { Schema } from "effect"
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const schema = Schema.Struct({
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name: Schema.String
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})
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// ┌─── StandardSchemaV1<{ readonly name: string; }>
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// ▼
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const standardSchema = Schema.standardSchemaV1(schema)
Effect.fn improvements
Effect.fn has been improved to allow you to access the function arguments inside any of the pipeline functions.
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import { Effect } from "effect"
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const fn = Effect.fn("my function")(
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function* (n: number) {
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yield* Effect.log(`n is ${n}`)
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},
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// you can now access the arguments here
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(effect, n) => Effect.annotateLogs(effect, { n })
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)
RcMap improvements
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RcMap.invalidatehas been added, for invalidating a resource at the given key. -
RcMap.touchhas been added, for refreshing the idle timeout of a resource at the given key.
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import { Effect, RcMap } from "effect"
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Effect.gen(function* () {
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const map = yield* RcMap.make({
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lookup: (n: number) => Effect.succeed(n),
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idleTimeToLive: "1 minute"
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})
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// retrieve the resource at key 1
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yield* Effect.scoped(RcMap.get(map, 1))
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// refresh the idle timeout of the resource at key 1
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yield* RcMap.touch(map, 1)
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// invalidate the resource at key 1
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yield* RcMap.invalidate(map, 1)
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})
Effect.transposeOption
This function transforms an Option<Effect<A, E, R>> into anEffect<Option<A>, E, R>. If the Option is None, the resulting Effectwill immediately succeed with a None value. If the Option is Some, the inner Effect will be executed, and its result wrapped in a Some.
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import { Effect, Option } from "effect"
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// ┌─── Option<Effect<number, never, never>>
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// ▼
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const maybe = Option.some(Effect.succeed(42))
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// ┌─── Effect<Option<number>, never, never>
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// ▼
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const result = Effect.transposeOption(maybe)
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console.log(Effect.runSync(result))
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// Output: { _id: 'Option', _tag: 'Some', value: 42 }
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