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How to print formatted (!) the current timestamp?
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How to print formatted (!) the current timestamp? Thomas Blabb 05-04-2008
Posted by Gunnar Hjalmarsson on May 4, 2008, 6:00 pm
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 Keith Keller wrote:
>> Keith Keller wrote:
>>> perl date formatting has nothing to do with UNIX date; %Y for example
>>> is the hash named Y, and bears no relation at all to your call to
>>> localtime. Read perldoc -f sprintf for valid formats (%Y is
>>> certainly not one).
>>
>> Wouldn't it have been better to point the OP to POSIX::strftime() and
>> drop that rant?
>
> Was I ranting? I thought I was just being complete. Thanks for the
> pointer to POSIX::strftime; I seldom use the POSIX:: modules.

The attempt to use the string '%Y%m%d-%H%M' in a date formating context
told us that the OP was groping for strftime(). Considering that Owen
had figured it out several hours before you posted, I found it not very
fruitful to lead the OP away from that date formating method.

--
Gunnar Hjalmarsson
Email: http://www.gunnar.cc/cgi-bin/contact.pl

Posted by Ben Morrow on May 4, 2008, 2:29 pm
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> > I want to print the current time(stamp) in formatted style.
> > The following does not work:
> >
> > print STDOUT "Now=%Y%m%d-%H%M\n", localtime(time);
>
<snip>
> If you want to use a print-equivalent statement to do your formatting,
> you need to use printf. Also, perl date formatting has nothing to do
> with UNIX date; %Y for example is the hash named Y, and bears no
> relation at all to your call to localtime. Read perldoc -f sprintf for
> valid formats (%Y is certainly not one).

...however it is a valid format for strftime, which I suspect is what
the OP wanted.

use POSIX qw/strftime/;

print STDOUT strftime "Now=%Y%m%d-%H%M\n", localtime;

Ben

--
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Posted by Uri Guttman on May 4, 2008, 2:38 pm
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>> print STDOUT "Now=%Y%m%d-%H%M\n", localtime(time);

KK> If you want to use a print-equivalent statement to do your formatting,
KK> you need to use printf. Also, perl date formatting has nothing to do
KK> with UNIX date; %Y for example is the hash named Y, and bears no
KK> relation at all to your call to localtime. Read perldoc -f sprintf for
KK> valid formats (%Y is certainly not one).

actually %Y is just the string '%Y' there. hashes don't interpolate in
strings. and yes, the OP is confusing time formats (date and strftime)
with printf formats.

uri

--
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