@monstermann/fn/dist/array/medianOr.js

A utility library for TypeScript.

import { dfdlT } from "@monstermann/dfdl";

//#region src/array/medianOr.ts
/**
* `medianOr(array, fallback)`
*
* Returns the median value of the number `array`, or `fallback` if the array is empty.
*
* ```ts
* medianOr([1, 2, 3, 4, 5], 0); // 3
* ```
*
* ```ts
* pipe([1, 2, 3, 4, 5], medianOr(0)); // 3
* ```
*/
const medianOr = dfdlT((target, or) => {
	if (target.length === 0) return or;
	const sorted = target.toSorted((a, b) => a - b);
	const mid = Math.floor(sorted.length / 2);
	if (sorted.length % 2 === 0) return (sorted[mid - 1] + sorted[mid]) / 2;
	else return sorted[mid];
}, 2);

//#endregion
export { medianOr };