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Re: Emacs Lisp: Writing a Date Time String Parsing Function
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Xah Lee
Sep 21, 2011, 7:28:43 PM9/21/11
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〈Emacs Lisp: Writing a Date Time String Parsing Function〉
http://xahlee.org/emacs/elisp_parse_time.html
On Sep 21, 4:48 am, "Oleksandr Gavenko (gavenkoa)"
<gave...@bifit.com.ua> wrote:
> 04.09.2011 11:29, Xah Lee пишет:> Write a elisp function. The function will take a string argument that's any of common date time format, e.g.
>
> > Fri, 2 Sep 2011 11:14:11 +0200 (unixy)
>
> > 09/02/2011 (USA)
> > Sep 2, 2011
> > 2 Sep, 2011
> > 2 September, 2011
> Facking USA time format... Why people like it???? STOOOPPP!!!
>
> format-time-string is a built-in function in `C source code'.
> ...
> %b and %h are the locale's abbreviated month name, %B the full name.
>
> So if you use:
>
> (format-time-string "%d %b %Y %H:%M:%S %z" ...)
>
> like this done in
>
> http://bazaar.launchpad.net/~hexmode/weblogger-el/trunk/view/head:/we...
>
> you can not parse back by 'parse-time-string' as month name is 'Март'.
>
>
>
> > and output a canonical form 2011-09-02.
>
> This time specification come from ISO 8601 3ed:
>
> (parse-time-string "1985-04-12T10:15:30+04:00") ; fail
> (parse-time-string "19850412T101530+0400") ; fail
>
> Emacs understand only (space instead 'T', no timezone):
>
> (parse-time-string "1985-04-12 10:15:30") ; OK
as far as i know, using space instead of T is not part of the ISO 8601
standard. Or did they change?
i know that there are standards based on ISO 8601 that allows space. I
think it's part of some XML. Anyone know which standard is it?
Xah
http://xahlee.org/emacs/elisp_parse_time.html
On Sep 21, 4:48 am, "Oleksandr Gavenko (gavenkoa)"
<gave...@bifit.com.ua> wrote:
> 04.09.2011 11:29, Xah Lee пишет:> Write a elisp function. The function will take a string argument that's any of common date time format, e.g.
>
> > Fri, 2 Sep 2011 11:14:11 +0200 (unixy)
>
> > 09/02/2011 (USA)
> > Sep 2, 2011
> > 2 Sep, 2011
> > 2 September, 2011
> Facking USA time format... Why people like it???? STOOOPPP!!!
>
> format-time-string is a built-in function in `C source code'.
> ...
> %b and %h are the locale's abbreviated month name, %B the full name.
>
> So if you use:
>
> (format-time-string "%d %b %Y %H:%M:%S %z" ...)
>
> like this done in
>
> http://bazaar.launchpad.net/~hexmode/weblogger-el/trunk/view/head:/we...
>
> you can not parse back by 'parse-time-string' as month name is 'Март'.
>
>
>
> > and output a canonical form 2011-09-02.
>
> This time specification come from ISO 8601 3ed:
>
> (parse-time-string "1985-04-12T10:15:30+04:00") ; fail
> (parse-time-string "19850412T101530+0400") ; fail
>
> Emacs understand only (space instead 'T', no timezone):
>
> (parse-time-string "1985-04-12 10:15:30") ; OK
as far as i know, using space instead of T is not part of the ISO 8601
standard. Or did they change?
i know that there are standards based on ISO 8601 that allows space. I
think it's part of some XML. Anyone know which standard is it?
Xah
Antony
Sep 22, 2011, 10:20:36 AM9/22/11
to
On 9/21/2011 4:28 PM, Xah Lee wrote:
>> Emacs understand only (space instead 'T', no timezone):
>>
>> (parse-time-string "1985-04-12 10:15:30") ; OK
>
> as far as i know, using space instead of T is not part of the ISO 8601
> standard. Or did they change?
>
> i know that there are standards based on ISO 8601 that allows space. I
> think it's part of some XML. Anyone know which standard is it?
I just happen to stumble on this today>> Emacs understand only (space instead 'T', no timezone):
>>
>> (parse-time-string "1985-04-12 10:15:30") ; OK
>
> as far as i know, using space instead of T is not part of the ISO 8601
> standard. Or did they change?
>
> i know that there are standards based on ISO 8601 that allows space. I
> think it's part of some XML. Anyone know which standard is it?
http://diveintohtml5.org/semantics.html#time-element
Although I am sure that's not the origin of the T thing
-Antony
Oleksandr Gavenko (aka gavenkoa)
Sep 26, 2011, 4:52:15 PM9/26/11
to
Network Working Group G.
Klyne
Request for Comments: 3339 Clearswift
Corporation
Category: Standards Track C.
Newman
Sun
Microsystems
July
2002
Date and Time on the Internet: Timestamps
In "Internet Date/Time Format" section written:
NOTE: ISO 8601 defines date and time separated by "T".
Applications using this syntax may choose, for the sake of
readability, to specify a full-date and full-time separated by
(say) a space character.
Oleksandr Gavenko (aka gavenkoa)
Sep 26, 2011, 5:01:18 PM9/26/11
to
On 22 сен, 02:28, Xah Lee <xah...@gmail.com> wrote:
> as far as i know, using space instead of T is not part of the ISO 8601
> standard. Or did they change?
>
I look into ISO_8601-2004_E.pdf and found:
> standard. Or did they change?
>
Unless explicitly allowed by this International Standard the
character
“space” shall not be used in the representations.
and all other occurrence of 'space' keyword with 'without' word.
Xah Lee
Sep 26, 2011, 8:11:01 PM9/26/11
to
Xah Lee wrote:
> as far as i know, using space instead of T is not part of the ISO 8601
> standard. Or did they change?
> i know that there are standards based on ISO 8601 that allows space. I
> think it's part of some XML. Anyone know which standard is it?
Oleksandr Gavenko (aka gavenkoa) <gaven...@gmail.com> wrote:
> as far as i know, using space instead of T is not part of the ISO 8601
> standard. Or did they change?
> i know that there are standards based on ISO 8601 that allows space. I
> think it's part of some XML. Anyone know which standard is it?
> http://tools.ietf.org/html/rfc3339
> In "Internet Date/Time Format" section written:
>
> NOTE: ISO 8601 defines date and time separated by "T".
> Applications using this syntax may choose, for the sake of
> readability, to specify a full-date and full-time separated by
> (say) a space character.
Xah
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