effect-io-ai

Package: effect
Module: Array

Array.makeBy

Creates a NonEmptyArray of length n where element i is computed by f(i).

When to use

Use when you need to compute each array element from its index.

Details

n is normalized to an integer greater than or equal to 1, so this function always returns at least one element. Supports both data-first and data-last usage.

Example (Generating values from indices)

import { Array } from "effect"

const result = Array.makeBy(5, (n) => n * 2)
console.log(result) // [0, 2, 4, 6, 8]

See

• range — create a range of integers
• replicate — repeat a single value

Signature

declare const makeBy: { <A>(f: (i: number) => A): (n: number) => NonEmptyArray<A>; <A>(n: number, f: (i: number) => A): NonEmptyArray<A>; }

Source

Since v2.0.0