Function isInvalidWeekDay

src/pattern/validation/pattern-validation.ts:80–89

* @param {string} expression The Cron-Job expression. * @returns {boolean}

(expression)

 * @returns {boolean}
 */
function isInvalidWeekDay(expression) {
    // `<weekday>#<nth>` (e.g. `2#3`, "the 3rd Tuesday") and `<weekday>L` (e.g.
    // `5L`, "the last Friday") are valid tokens in this field only. The weekday
    // is 0-7 (0 or 7 = Sunday); the `#` occurrence is 1-5. Any remaining entries
    // must still be valid weekday numbers. Malformed forms (bare `L`, `L5`,
    // `8L`, `2#6`, ...) never become tokens, so they fall through and are
    // rejected.
    const days = expression.filter((value) => !isNthWeekdayToken(value) && !/^[0-7]L$/.test(value));
    return !isValidExpression(days, 0, 7);
}

/**
 * @param {string[]} patterns The Cron-Job expression patterns.