New feature: Option for legacy dom-OR-dow

[Hexagon]

By default, croner work differently from the standard refered to by @vixie. If you specify both day-of-month and day-of-week ( 0 0 1 * MON) croner would only run when there is a monday at the 1st of any month. This enable you to set patterns that run on the first monday of any month (0 0 1-7 * MON) and other clever stuff.

In classic cron (Vixie, for example), day-of-month and day-of-week are ORed, which makes 0 0 1 * MON run at the 1st of any month AND at mondays.

	/* the dom/dow situation is odd.  '* * 1,15 * Sun' will run on the
	 * first and fifteenth AND every Sunday;  '* * * * Sun' will run *only*
	 * on Sundays;  '* * 1,15 * *' will run *only* the 1st and 15th.  this
	 * is why we keep 'e->dow_star' and 'e->dom_star'.  yes, it's bizarre.
	 * like many bizarre things, it's the standard.
	 */

• https://github.com/vixie/cron/blob/690fc534c7316e2cf6ff16b8e83ba7734b5186d2/cron.c#L299

Croner should support this with options, maybe

{ 
   legacyMode: true
}

[vixie]

I was only following at&t and BSD convention which later became POSIX. It may not be great but it is expected behaviour. ⁣Get BlueMail for Android ​

On Feb 15, 2022, 22:00, at 22:00, Hexagon ***@***.***> wrote: By default, croner work differently from the standard refered to by

***@***.*** If you specify both day-of-month and day-of-week ( `0 0 1 *

…

MON`) croner would only run when there is a monday at the 1st of any month. This enable you to set patterns that run on the first monday of any month (`0 0 1-7 * MON`) and other clever stuff. In classic cron (Vixie, for example), day-of-month and day-of-week are ORed, which makes `0 0 1 * MON` run at the 1st of any month **AND** at mondays. ```c /* the dom/dow situation is odd. '* * 1,15 * Sun' will run on the * first and fifteenth AND every Sunday; '* * * * Sun' will run *only* * on Sundays; '* * 1,15 * *' will run *only* the 1st and 15th. this * is why we keep 'e->dow_star' and 'e->dom_star'. yes, it's bizarre. * like many bizarre things, it's the standard. */ ``` - https://github.com/vixie/cron/blob/690fc534c7316e2cf6ff16b8e83ba7734b5186d2/cron.c#L299 Croner should support this with options, maybe ```javascript { legacyMode: true } ``` -- Reply to this email directly or view it on GitHub: #53 You are receiving this because you were mentioned. Message ID: ***@***.***>

[Hexagon]

Implemented in 4.2.0

[Hexagon]

Legacy mode (dom-OR-dow) is default from 5.0.0

You can switch to "croner mode" (dom-AND-dow) by passing option { legacyMode: false }

[vixie]

nice. thanks.