Date Comparison

This topic has 3 replies, 2 voices, and was last updated 16 years, 8 months ago by Kevin Kinnell.

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February 1, 2008 at 5:39 pm #49793

Jeannette Wistrom
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I need to compare two julian dates and get the difference between the two. This is on a windows server and the dateDiff does not work. Any suggestions?
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- February 4, 2008 at 1:31 am #63614
  
  Kevin Kinnell
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  ~~Jeannette Wistrom wrote:~~
  
  I need to compare two julian dates and get the difference between the two. This is on a windows server and the dateDiff does not work. Any suggestions?
  
  Jeannette–
  
  You might try getting GNU date (a binary for Windows is in the Coreutils package at http://gnuwin32.sourceforge.net/packages.html). If you’re not familiar with GNU date it will pop your eyes with the number of different input forms it will accept (“yesterday” and “last monday” come to mind, the day of the year is no problem.) It has an extensive set of formatting options for output as well. You can pretty easily convert your J dates to epoch dates, subtract them and reconvert via ‘date’ or with a little arithmetic.
  
  hth
- February 4, 2008 at 2:25 am #63615
  
  Jeannette Wistrom
  Participant
  
  Thanks Kevin. I actually used the clock scan command and it worked great. I will check out your suggestion for future needs.
- February 4, 2008 at 2:30 pm #63616
  
  Kevin Kinnell
  Participant
  
  Oh sure, do it the _easy_ way… 😆
  
  ‘date’ first came to my mind because I’ve been scripting something which needs to get the date for “yesterday”, and there’s no easier way for that than a quick pipe to date.
  
  –kevin (duh) kinnell
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