:old_key: @total-order/key

Comparison function from key function for JavaScript. See docs.

import {key, len, prop} from '@total-order/key';
import {increasing} from '@total-order/primitive';
import {iterable} from '@total-order/iter';

const order = key(
    iterable(increasing),
    function* (x) {
        yield x['🙀'] * x['🦿'];
        yield x['🤖'];
    }
);