Function parseStringMonth

Parses a string into a CronMonth.

Example

parseStringMonth("10"); // 10
parseStringMonth("*"); // "*"
parseStringMonth("2/6"); // { every: 6, start: 2 }
parseStringMonth("?/6"); // { every: 6, start: "?" }
parseStringMonth("1,2,3,4"); // [1, 2, 3, 4]
parseStringMonth("1-5"); // { from: 1, to: 5 }
parseStringMonth("JAN-OCT"); // { from: "JAN", to: "OCT" }
parseStringMonth("jan-oct"); // { from: "JAN", to: "OCT" }
parseStringMonth("1,2,3,5-7"); // [1, 2, 3, { from: 5, to: 7 }]
parseStringMonth("INVALID"); // undefined
parseStringMonth("1,2,3,4,INVALID"); // undefined

Returns

A CronMonth or undefined if invalid.