| 12345678910111213141516 | var startOf = require('./startOf');    /**     * Check if date is "same" with optional period     */    function isSame(date1, date2, period){        if (period) {            date1 = startOf(date1, period);            date2 = startOf(date2, period);        }        return Number(date1) === Number(date2);    }    module.exports = isSame;
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