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

A utility library for TypeScript.

import { dfdlT } from "@monstermann/dfdl";
import { cloneArray, markAsMutable } from "@monstermann/remmi";

//#region src/array/dropLast.ts
/**
* `dropLast(target, amount)`
*
* Removes `amount` of elements from the end of the `target` array.
*
* ```ts
* dropLast([1, 2, 3, 4, 5], 2); // [1, 2, 3]
* ```
*
* ```ts
* pipe([1, 2, 3, 4, 5], dropLast(2)); // [1, 2, 3]
* ```
*/
const dropLast = dfdlT((target, amount) => {
	if (!Number.isInteger(amount) || target.length === 0 || amount < 0) return target;
	if (target.length <= amount) return markAsMutable([]);
	target = cloneArray(target);
	target.splice(target.length - amount, amount);
	return target;
}, 2);

//#endregion
export { dropLast };