8000 what is the starbit used for? · Issue #471 · robfig/cron · GitHub
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rickywei opened this issue Nov 24, 2022 · 1 comment
Open

what is the starbit used for? #471

rickywei opened this issue Nov 24, 2022 · 1 comment

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@rickywei
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First of all, thans for your great cron job.
I read dayMatches code in spec.go but did not figure out why you check starBit before return result.
Why use || operation when both starBit of dom and dow is 0. I think we always need use && to get result.
Could youhelp to explain some details of this?
Thanks in advance :)

// dayMatches returns true if the schedule's day-of-week and day-of-month
// restrictions are satisfied by the given time.
func dayMatches(s *SpecSchedule, t time.Time) bool {
	var (
		domMatch bool = 1<<uint(t.Day())&s.Dom > 0
		dowMatch bool = 1<<uint(t.Weekday())&s.Dow > 0
	)
	if s.Dom&starBit > 0 || s.Dow&starBit > 0 {
		return domMatch && dowMatch
	}
	return domMatch || dowMatch
}
@rickywei rickywei changed the title what isthe starbit used for? what is the starbit used for? Nov 25, 2022
@xuyang2
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xuyang2 commented Sep 21, 2023 •
edited
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It seems starBit means <asterisk>

#70 (comment)

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@xuyang2 @rickywei
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