times

Invokes fn count times and returns an array of the results. The function receives the current index (0-based) on each call.

Try it

Import

import { times } from "1o1-utils";

import { times } from "1o1-utils/times";

Signature

function times<T>(params: { count: number; fn: (index: number) => T }): T[]

Parameters

Name	Type	Required	Description
count	number	Yes	The number of times to invoke fn (non-negative integer)
fn	(index: number) => T	Yes	The function to invoke; receives the current index

Returns

T[] — An array of length count containing the results of each invocation.

Examples

times({ count: 3, fn: (i) => i * 2 });
// => [0, 2, 4]

// Generate a list of objects
times({ count: 3, fn: (i) => ({ id: i, name: `item-${i}` }) });
// => [{ id: 0, name: "item-0" }, { id: 1, name: "item-1" }, { id: 2, name: "item-2" }]

// Random values
times({ count: 5, fn: () => Math.random() });
// => [0.42, 0.91, 0.13, 0.77, 0.05]

// Zero count returns an empty array
times({ count: 0, fn: (i) => i });
// => []

Edge Cases

• Throws if count is not a number or is NaN.
• Throws if count is not an integer (including Infinity).
• Throws if count is negative.
• Throws if fn is not a function.
• count: 0 returns [] and does not invoke fn.

Also known as

repeat, range, fill, generate

Prompt suggestion

I'm using 1o1-utils (npm: https://www.npmjs.com/package/1o1-utils, GitHub: https://github.com/pedrotroccoli/1o1-utils, LLM context: https://pedrotroccoli.github.io/1o1-utils/llms.txt). Show me how to use times to generate an array of N items by invoking a factory function.