either.md

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

Returns true if at least one function returns true for a given set of arguments, false otherwise.

Use the logical or (||) operator on the result of calling the two functions with the supplied args.

export const either = (f: Function, g: Function) => (...args: any[]) =>
  f(...args) || g(...args);

const isEven = (num: number) => num % 2 === 0;
const isPositive = (num: number) => num > 0;
const isPositiveOrEven = either(isPositive, isEven);

isPositiveOrEven(4); // true
isPositiveOrEven(3); // true

interface User {
  name: string;
  age: number;
}
const user1: User = {
  name: "deepak",
  age: 18,
};
const user2: User = {
  name: "Martha",
  age: 21,
};
const isDeepak = (u: User) => u.name === "deepak";
const isAdult = (minAge: number, u: User) => u.age > minAge;