effect-io-ai

Package: effect
Module: Effect

Effect.every

Determines whether all elements of the iterable satisfy the effectful predicate.

Details

This function checks whether every element in a given collection (an iterable) satisfies a condition defined by an effectful predicate.

The predicate is a function that takes an element and its index, and it returns an effect that evaluates to a boolean.

The function will process each element and return true if all elements satisfy the predicate; otherwise, it returns false.

When to Use

This function is useful when you need to verify that all items in a collection meet certain criteria, even when the evaluation of each item involves effects, such as asynchronous checks or complex computations.

Example

import { Effect } from "effect"

const numbers = [2, 4, 6, 8]
const predicate = (n: number, i: number) => Effect.succeed(n % 2 === 0)

const program = Effect.gen(function*() {
  const allEven = yield* Effect.every(numbers, predicate)
  console.log(allEven)
})

Effect.runFork(program)
// Output: true

See

• exists for a similar function that returns a boolean indicating whether any element satisfies the predicate.

Signature

declare const every: { <A, E, R>(predicate: (a: A, i: number) => Effect<boolean, E, R>): (elements: Iterable<A>) => Effect<boolean, E, R>; <A, E, R>(elements: Iterable<A>, predicate: (a: A, i: number) => Effect<boolean, E, R>): Effect<boolean, E, R>; }

Source

Since v2.0.0