From: stardiviner <numbchild@gmail.com>
To: Dmitry Alexandrov <dag@gnui.org>
Cc: Emacs Help <help-gnu-emacs@gnu.org>
Subject: [SOLVED] Re: How to subtract timestamp in elisp?
Date: Sun, 05 Jul 2020 11:04:16 +0800 [thread overview]
Message-ID: <87y2nyd5n3.fsf@gmail.com> (raw)
In-Reply-To: <zh8f6l4y.dag@gnui.org>
Dmitry Alexandrov <dag@gnui.org> writes:
> stardiviner <numbchild@gmail.com> wrote:
>> I hope a function can subtract two timestamps:
>>
>> 00:12:35 - 00:10:45 = 00:01:50
>>
>> Is there some hints or suggestion like function name or Emacs library or package?
>
>> Or Linux command is acceptable. I can write a function to execute shell command then parse the result.
>
> OMG! Since when that started to require anything but arithmetics?
>
> (defun timestamp-interval (a b)
> (cl-flet* ((hms->s (h m s) (+ (* 3600 h)
> (* 60 m)
> s))
> (s->hms (s) (let* ((h (/ s 3600))
> (s (% s 3600))
> (m (/ s 60))
> (s (% s 60)))
> (list h m s)))
> (timestamp->s (string) (apply #'hms->s
> (mapcar #'string-to-number
> (split-string string ":"))))
> (s->timestamp (s) (apply #'format "%s%02d:%02d:%02d"
> (if (> 0 s) "-" "") (s->hms (abs s)))))
> (s->timestamp (- (timestamp->s a) (timestamp->s b)))))
>
> (timestamp-interval "00:12:35" "00:10:45")
> ;; => "00:01:50"
>
> (Not tested.)
>
Dmitry:
This is really great. I thought to use `split-string` too to parse timestamp. My
thought was to use existing API if exist when I compose this email. But
implement a function to dealing with this is great too. Thanks for your help.
And of course Eli and Michael too.
> P. S. Sending mail ‘From: …@gmail.com’ right from your home machine is a best
> way to send it straight to junk folder. ;-) Use smtp.gmail.com.
I used to realized my email always go into Gmail junk, can't find out the
reason. I guess you just solved my long time issue. I'm using Emacs mu4e
package. I will Google how to use SMTP server in mu4e. Thanks again.
--
[ stardiviner ]
I try to make every word tell the meaning that I want to express.
Blog: https://stardiviner.github.io/
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next prev parent reply other threads:[~2020-07-05 3:04 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-04 11:11 How to subtract timestamp in elisp? stardiviner
2020-07-04 11:39 ` Eli Zaretskii
2020-07-04 12:54 ` Michael Heerdegen
2020-07-04 21:17 ` Dmitry Alexandrov
2020-07-04 21:11 ` Dmitry Alexandrov
2020-07-05 3:04 ` stardiviner [this message]
2020-07-06 2:48 ` mu4e: configuring SMTP (was: [SOLVED] Re: How to subtract timestamp in elisp?) Dmitry Alexandrov
2020-07-05 13:30 ` How to subtract timestamp in elisp? Emanuel Berg via Users list for the GNU Emacs text editor
2020-07-06 1:43 ` stardiviner
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