where-to-eat.js

function whereToEat(except) {
	const ALL_OPTIONS = [
		{ name: 'Китайцы', days: [2, 3, 4, 5] },
		{ name: 'Итальянцы', days: [2, 3, 4, 5] },
		{ name: 'Греки', days: [1, 2, 3, 4, 5] },
		{ name: 'Суши', days: [2, 3, 4, 5] },
		{ name: 'Вьетнамцы', days: [2, 4, 5] },
		{ name: 'Кабул', days: [5] },
		{ name: 'Джерси Джо', days: [2, 3, 4, 5] },
		{ name: 'Бургеры', days: [2, 3, 4, 5] },
		{ name: 'Сабвей', days: [1] },
		{ name: 'Гоу Фиш', days: [1] },
		{ name: 'Хигума', days: [3, 4] },
		{ name: 'Мексиканцы', days: [1, 2, 3, 4, 5] },
	]
	const options = ALL_OPTIONS.filter(opt => {
		const today = new Date().getDay()
		return opt.days.indexOf(today) >= 0 && (!except || except.indexOf(opt.name) < 0)
	})
	return options[Math.floor(options.length * Math.random())].name
}

Example of usage: whereToEat(['Суши'])