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Subtracting Dates

 
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DoT_PiTcH
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Joined: 07 Aug 2002
Posts: 85

PostPosted: Thu Sep 01, 2011 8:17 pm    Post subject: Subtracting Dates Reply with quote

i have a list of files where the name schema is:

device_20110818163025.avi

so year month day hour min sec

i want to filter out any files older than 14 days from current day.

im stuck
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uvedese
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Joined: 21 Jan 2006
Posts: 159
Location: Spain

PostPosted: Fri Sep 02, 2011 11:34 am    Post subject: Reply with quote

Hi DoT_PiTcH:

First you must separate the different arguments:

Code:
  %1 = "device_20110818163025.avi"
  %%year = @substr(%1,8,11)
  %%month = @substr(%1,12,13)
  %%day = @substr(%1,14,15)
  %%hour = @substr(%1,16,17)
  %%minute = @substr(%1,18,19)
  %%second = @substr(%1,20,21)


Second, You must use the internal format that uses the @datetime() function to manage the time.

Actually, for your purposes, we need only the variables %%year, %%month and %%day:

Code:
%a = @datetime(,%%month/%%day/%%year)


The difference between consecutive days is 1, for example:

Code:
  %a = @datetime(,01/01/2011)
  %b = @datetime(,01/02/2011)
 
  info @diff(%b,%a)


Finally, using the current date and separating the arguments of the different files, we can get to know the days that have passed on to today:

Code:
option decimalsep,.

  %1 = "device_20110818163025.avi"
 
  %%year = @substr(%1,8,11)
  %%month = @substr(%1,12,13)
  %%day = @substr(%1,14,15)
 
  %%today = @fint(@datetime())
  %2 = @datetime(,%%month/%%day/%%year)
 
  info @diff(%%today,%2)


I hope it help you Very Happy

_______________

uVeDeSe
_______________
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DoT_PiTcH
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Joined: 07 Aug 2002
Posts: 85

PostPosted: Sun Sep 04, 2011 5:51 pm    Post subject: Reply with quote

Perfect thank you!
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