Re: How do I find difference between two timestamps?

The timegm function in Time::Local can convert a Zulu (GMT) time into a timestamp. Since your date formats are nonstandard, it would be simplest to break out the year, month, day, hours, minutes, and seconds with a regular expression or substrings, then do:

$time = timegm($sec,$min,$hour,$mday,$mon,$year);
[download]

These times can be subtracted to give differences in seconds. You'll have to subtract the milliseconds separately and add that to the difference.

Comment on Re: How do I find difference between two timestamps? Download Code

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Re^2: How do I find difference between two timestamps? by tomhukins (Curate) on Nov 16, 2004 at 17:23 UTC
Since your date formats are nonstandard Non-standard how? They conform to ISO 8601, which defines the international standard for expressing dates and times.	[reply]
Re^3: How do I find difference between two timestamps? by tall_man (Parson) on Nov 16, 2004 at 18:22 UTC
That may be so according to the most recent 8601 standard, but as far as Perl is concerned it is not. For example, Date::Manip claims to be able to handle ISO 8601 date formats, but the following will fail: `use strict; use Date::Manip; my $string = "2004-11-15T18:59:52.863Z"; my $date = ParseDate($string); print $date,"\n";` [download]	[reply] [d/l]
Re^4: How do I find difference between two timestamps? by tomhukins (Curate) on Nov 16, 2004 at 23:04 UTC
Date::Manip claims to be able to handle ISO 8601 date formats, but the following will fail It seems Date::Manip only understands a subset of valid ISO 8601 formats. Again, I suggest the DateTime collection of modules that have been mentioned elsewhere in this discussion. The DateTime modules do a good job of dealing with dates, times, intervals, timezone differences, daylight savings time, and other things that make this type of programming more difficult than first appearances suggest.	[reply]


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