effect-io-ai

Package: effect
Module: HashSet

HashSet.filter

Filters values out of a HashSet using the specified predicate.

The time complexity is of O(n).

Example

// Syntax with  Predicate
import { HashSet, type Predicate, pipe } from "effect"

const filterPositiveNumbers: Predicate.Predicate<number> = (n) => n > 0

// with `data-last`, a.k.a. `pipeable` API
pipe(
  HashSet.make(-2, -1, 0, 1, 2),
  HashSet.filter(filterPositiveNumbers)
)

// or with the pipe method
HashSet.make(-2, -1, 0, 1, 2).pipe(HashSet.filter(filterPositiveNumbers))

// or with `data-first` API
HashSet.filter(HashSet.make(-2, -1, 0, 1, 2), filterPositiveNumbers)

Example

/// Syntax with Refinement
import { HashSet, pipe } from "effect"

const stringRefinement = (value: unknown): value is string =>
  typeof value === "string"

// with `data-last`, a.k.a. `pipeable` API
pipe(
  HashSet.make(1, "unos", 2, "two", 3, "trois", 4, "vier"), // // HashSet.HashSet<number | string>
  HashSet.filter(stringRefinement)
) // HashSet.HashSet<string>

// or with the pipe method
HashSet.make(1, "unos", 2, "two", 3, "trois", 4, "vier") // HashSet.HashSet<number | string>
  .pipe(HashSet.filter(stringRefinement)) // HashSet.HashSet<string>

// or with `data-first` API
HashSet.filter(
  HashSet.make(1, "unos", 2, "two", 3, "trois", 4, "vier"), // HashSet.HashSet<number | string>
  stringRefinement
) // HashSet.HashSet<string>

Signature

declare const filter: { <A, B extends A>(refinement: Refinement<NoInfer<A>, B>): (self: HashSet<A>) => HashSet<B>; <A>(predicate: Predicate<NoInfer<A>>): (self: HashSet<A>) => HashSet<A>; <A, B extends A>(self: HashSet<A>, refinement: Refinement<A, B>): HashSet<B>; <A>(self: HashSet<A>, predicate: Predicate<A>): HashSet<A>; }

Source

Since v2.0.0