Function parseStringMonthValue

Parses a string into a CronMonthValue.

Example

parseStringMonthValue("10"); // 10
parseStringMonthValue("OCT"); // "OCT"
parseStringMonthValue("oct"); // "OCT"
parseStringMonthValue("24"); // undefined
parseStringMonthValue("IDK"); // undefined

Returns

A CronMonthValue or undefined if invalid.