effect-io-ai

Package: effect
Module: HashSet

HashSet.fromIterable

Creates a new HashSet from an iterable collection of values.

Time complexity: O(n) where n is the number of elements in the iterable

Example

// Creating a HashSet from an Array
import { HashSet, pipe } from "effect"

console.log(
  pipe(
    [1, 2, 3, 4, 5, 1, 2, 3], // Array<number> is an Iterable<number>;  Note the duplicates.
    HashSet.fromIterable,
    HashSet.toValues
  )
) // Output: [1, 2, 3, 4, 5]

Example

// Creating a HashSet from a Set
import { HashSet, pipe } from "effect"

console.log(
  pipe(
    new Set(["apple", "banana", "orange", "apple"]), // Set<string> is an Iterable<string>
    HashSet.fromIterable,
    HashSet.toValues
  )
) // Output: ["apple", "banana", "orange"]

Example

// Creating a HashSet from a Generator
import { HashSet } from "effect"

// Generator functions return iterables
function* fibonacci(n: number): Generator<number, void, unknown> {
  let [a, b] = [0, 1]
  for (let i = 0; i < n; i++) {
    yield a
    ;[a, b] = [b, a + b]
  }
}

// Create a HashSet from the first 10 Fibonacci numbers
const fibonacciSet = HashSet.fromIterable(fibonacci(10))

console.log(HashSet.toValues(fibonacciSet))
// Outputs: [0, 1, 2, 3, 5, 8, 13, 21, 34] but in unsorted order

Example

//  Creating a HashSet from another HashSet
import { HashSet, pipe } from "effect"

console.log(
  pipe(
    // since HashSet implements the Iterable interface, we can use it to create a new HashSet
    HashSet.make(1, 2, 3, 4),
    HashSet.fromIterable,
    HashSet.toValues // turns the HashSet back into an array
  )
) // Output: [1, 2, 3, 4]

Example

// Creating a HashSet from other Effect's data structures like Chunk
import { Chunk, HashSet, pipe } from "effect"

console.log(
  pipe(
    Chunk.make(1, 2, 3, 4), // Iterable<number>
    HashSet.fromIterable,
    HashSet.toValues // turns the HashSet back into an array
  )
) // Outputs: [1, 2, 3, 4]

See

• Other HashSet constructors are module:HashSet.empty module:HashSet.make

Signature

declare const fromIterable: <A>(elements: Iterable<A>) => HashSet<A>

Source

Since v2.0.0