(n: number): <A>(a: A) => Iterable<A>
<A>(a: A, n: number): Iterable<A>Returns a Iterable containing a value repeated the specified number of times.
Details
n is normalized to an integer greater than or equal to 1.
Example (Repeating a value)
import { Iterable } from "effect"
import * as assert from "node:assert"
assert.deepStrictEqual(Array.from(Iterable.replicate("a", 3)), ["a", "a", "a"])constructors
Source effect/Iterable.ts:1234 lines
export const const replicate: {
(n: number): <A>(a: A) => Iterable<A>
<A>(a: A, n: number): Iterable<A>
}
Returns a Iterable containing a value repeated the specified number of times.
Details
n is normalized to an integer greater than or equal to 1.
Example (Repeating a value)
import { Iterable } from "effect"
import * as assert from "node:assert"
assert.deepStrictEqual(Array.from(Iterable.replicate("a", 3)), ["a", "a", "a"])
replicate: {
(n: numbern: number): <function (type parameter) A in <A>(a: A): Iterable<A>A>(a: Aa: function (type parameter) A in <A>(a: A): Iterable<A>A) => interface Iterable<T, TReturn = any, TNext = any>Iterable<function (type parameter) A in <A>(a: A): Iterable<A>A>
<function (type parameter) A in <A>(a: A, n: number): Iterable<A>A>(a: Aa: function (type parameter) A in <A>(a: A, n: number): Iterable<A>A, n: numbern: number): interface Iterable<T, TReturn = any, TNext = any>Iterable<function (type parameter) A in <A>(a: A, n: number): Iterable<A>A>
} = import dualdual(2, <function (type parameter) A in <A>(a: A, n: number): Iterable<A>A>(a: Aa: function (type parameter) A in <A>(a: A, n: number): Iterable<A>A, n: numbern: number): interface Iterable<T, TReturn = any, TNext = any>Iterable<function (type parameter) A in <A>(a: A, n: number): Iterable<A>A> => const makeBy: <A>(
f: (i: number) => A,
options?: {
readonly length?: number
}
) => Iterable<A>
Creates an iterable by applying a function to consecutive integers.
Details
The function is called with each index starting from 0. If no length is
specified, the iterable is infinite. This is useful for generating
sequences, patterns, or any indexed data.
Example (Generating values by index)
import { Iterable } from "effect"
// Generate first 5 even numbers
const evens = Iterable.makeBy((n) => n * 2, { length: 5 })
console.log(Array.from(evens)) // [0, 2, 4, 6, 8]
// Generate squares
const squares = Iterable.makeBy((n) => n * n, { length: 4 })
console.log(Array.from(squares)) // [0, 1, 4, 9]
// Infinite sequence (be careful when consuming!)
const naturals = Iterable.makeBy((n) => n)
const first10 = Iterable.take(naturals, 10)
console.log(Array.from(first10)) // [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
makeBy(() => a: Aa, { length?: number | undefinedlength: n: numbern }))