Difference between integers (Dates)

[ApeX]

hi guys!
So here i have two arraylists with the following structure (year,
month, day)...
What's the best way to calculate difference between the two?

Example

arraylist1 - 12y, 1m, 10d
arraylist2 - 11y, 1m, 29d

....i need to get a new arraylist with values (1y, 1m, 12d)

Thnx!

[Peter Morris]

Re: Difference between integers (Dates)

DateTime a = new DateTime(2008, 10, 21);
DateTime b = new DateTime(2007, 1, 7);
TimeSpan elapsed = a - b;

TimeSpan has various properties for extracting the number of days etc.




--
Pete
====

http://mrpmorris.blogspot.com

http://www.capableobjects.com

[Stefan Hoffmann]

Re: Difference between integers (Dates)

hi,

ApeX wrote:

Example

Using a fiscal year:

arraylist1 - 12y, 1m, 10d

= 12 * 360 + 1 * 30 + 10

arraylist2 - 11y, 1m, 29d

= 11 * 360 + 1 * 30 + 29

...i need to get a new arraylist with values (1y, 1m, 12d)

(12 * 360 + 1 * 30 + 10) - (11 * 360 + 1 * 30 + 29) = 4360 - 4019 = 341
=0y + 11m + 11d


mfG
--stefan <--

[Rick Lones]

Re: Difference between integers (Dates)

ApeX wrote:

hi guys!
So here i have two arraylists with the following structure (year,
month, day)...
What's the best way to calculate difference between the two?
>
Example
>
arraylist1 - 12y, 1m, 10d
arraylist2 - 11y, 1m, 29d
>
...i need to get a new arraylist with values (1y, 1m, 12d)

You can't, unless you have some way of knowing how many days are in the
respective months and also which of the years are leap years. (I.e., how many
total days are represented by each arraylist.) You really should start with
DateTime structs and use DateTime.Subtra ct() to generate a TimeSpan difference.

HTH,
-rick-