Operator proposal: `includes`

[sagdeev]

Hi! I don’t think I’ve seen the operator for the includes method, but it can be very useful. What do you think about it? Also, it is possible to combine includes for arrays and strings.

const $array = createStore([1, 2, 3]);
const $string = createStore('Hello world!');

const $findInArray = createStore<number>(1);
const $findInString = createStore<string>('Hello');

const $isInclude = includes($array, 1);
const $isInclude = includes($array, $findInArray);

const $isInclude = includes($string, 'Hello');
const $isInclude = includes($string, $findInString);

Instead of combine

const $array = createStore([1, 2, 3]);
const $string = createStore('Hello world!');

const $findInArray = createStore<number>(1);
const $findInString = createStore<string>('Hello');

const $isInclude = combine($string, $findInString, (string, findInString) =>
  string.includes(findInString),
);