complement.md

title	tags	author_title	author_url	author_image_url	description	image
complement	function logic beginner	Deepak Vishwakarma	https://github.com/deepakshrma	https://avatars2.githubusercontent.com/u/7682731?s=400	Implementation of "complement" in typescript, javascript and deno.	https://www.positronx.io/wp-content/uploads/2018/11/positronx-banner-1152-1.jpg

Returns a function that is the logical complement of the given function, fn.

Use the logical not (!) operator on the result of calling fn with any supplied args.

type Func<T> = (...args: T[]) => any;
const complement =
  (fn: Func<any>) =>
  (...args: any[]) =>
    !fn(...args);

const isEven = (num: number) => num % 2 === 0;
const isOdd = complement(isEven);
isOdd(2); // false
isOdd(3); // true