Re: How many days between 2 DTs?
On Wed, 29 Dec 2004, Max Campos wrote: Well, here we go again with DateTime::Duration. Here's a simple problem - How many days are between two DateTime's ? Here is my attempt, but it fails. Suggestions? You want the delta_days() method. -dave /*=== VegGuide.Org Your guide to all that's veg. ===*/
Re: How many days between 2 DTs?
Hi Dave,
After feedback from another poster, it looks like the answer is the
following:
$now->delta_days($dt)->in_units('days');
It looks like durations end up broken up into 4 partitions.
Conversions can happen only within the partitions, not between:
years/months
weeks/days
hours/minutes
seconds/ns
Also, maybe DateTime should throw some kind of error when you run
in_units and a higher partition is being stripped off?
Ex:
my $dur = DateTime::Duration->new(months => 3, days=> 4);
$dur->in_units(days); # Error; currently 4
$dur->in_units(years); # No error, 0.
Finally, I think some explanation should be added to
DT:Duration::in_units that explains all of this!
- Max
Well, here we go again with DateTime::Duration.
Here's a simple problem - How many days are between two DateTime's ?
Here is my attempt, but it fails.
Suggestions?
You want the delta_days() method.
Re: How many days between 2 DTs?
On Thu, 30 Dec 2004, Max Campos wrote:
After feedback from another poster, it looks like the answer is the
following:
$now->delta_days($dt)->in_units('days');
It looks like durations end up broken up into 4 partitions. Conversions can
happen only within the partitions, not between:
years/months
weeks/days
hours/minutes
seconds/ns
Yes, _I_ know all this ;) I wrote it.
Also, maybe DateTime should throw some kind of error when you run in_units
and a higher partition is being stripped off?
Ex:
my $dur = DateTime::Duration->new(months => 3, days=> 4);
$dur->in_units(days); # Error; currently 4
$dur->in_units(years); # No error, 0.
It's not an error, and warnings for this sort of stuff will just annoy
people.
Finally, I think some explanation should be added to DT:Duration::in_units
that explains all of this!
I'll add it. The conversion issues are explained in DateTime.pm at length
and mentioned in the DESCRIPTION section of DT::Duration, but not in the
in_units method.
-dave
/*===
VegGuide.Org
Your guide to all that's veg.
===*/
