Effect.Effect<number, never, never>Generates a random number between 0 (inclusive) and 1 (exclusive).
When to use
Use to generate a pseudo-random floating-point number in the standard
[0, 1) range.
Example (Generating a random number)
import { Effect, Random } from "effect"
const program = Effect.gen(function*() {
const randomDouble = yield* Random.next
console.log("Random double:", randomDouble)
})export const const next: Effect.Effect<number>const next: {
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; <…;
toString: () => string;
toJSON: () => unknown;
}
Generates a random number between 0 (inclusive) and 1 (exclusive).
When to use
Use to generate a pseudo-random floating-point number in the standard
[0, 1) range.
Example (Generating a random number)
import { Effect, Random } from "effect"
const program = Effect.gen(function*() {
const randomDouble = yield* Random.next
console.log("Random double:", randomDouble)
})
next: 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<number> = const randomWith: <A>(
f: (random: (typeof Random)["Service"]) => A
) => Effect.Effect<A>
r: {
nextIntUnsafe(): number
nextDoubleUnsafe(): number
}
r: {
nextIntUnsafe(): number
nextDoubleUnsafe(): number
}
function nextDoubleUnsafe(): numbernextDoubleUnsafe())