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Groups > gnu.bash.bug > #12083
| From | Ralf Goertz <me@myprovider.invalid> |
|---|---|
| Newsgroups | gnu.bash.bug |
| Subject | Re: Only one Friday 13th coming in 2016 |
| Date | 2015-12-22 14:43 +0100 |
| Organization | solani.org |
| Message-ID | <20151222144353.323afe4a@delli.goertz.local> (permalink) |
| References | <slrnn7g4tl.2r3t.knock_yourself_out@vps.jonz.net> <20151221151338.GW27325@eeg.ccf.org> <20151222010544.GA21298@linda> <1450753456.7845.5.camel@16bits.net> <mailman.375.1450790195.843.bug-bash@gnu.org> |
Am Tue, 22 Dec 2015 08:16:28 -0500
schrieb Greg Wooledge <wooledg@eeg.ccf.org>:
> On Tue, Dec 22, 2015 at 04:04:16AM +0100, Ángel González wrote:
> > Aren't you making things more complex than needed, with so much
> > pipes and awk?
> >
> > date(1) is your friend:
> >
> > For instance:
> > $ for y in {1900..2199} ; do echo -n "$y "; for m in {1..12}; do
> > date +%A -d $y-$m-13; done | grep -c Friday ; done
> >
> > shows there are between 1 and 3 Fridays per year.
>
> This is the most obvious approach, but it does a fair amount of
> forking. Also, you're relying on GNU date.
And on the assumption that Friday is called „Friday“ in the used locale
which is a bit surprising since Ángel's name suggests that it is called
differently in his native locale. It is called „Freitag“ in mine so I
got no Friday 13th at all.
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Re: Only one Friday 13th coming in 2016 Greg Wooledge <wooledg@eeg.ccf.org> - 2015-12-22 08:16 -0500 Re: Only one Friday 13th coming in 2016 Ralf Goertz <me@myprovider.invalid> - 2015-12-22 14:43 +0100
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