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Top Forums Shell Programming and Scripting Converting date DD MM YYYY to DD MON YYYY Post 302510831 by Adamm on Tuesday 5th of April 2011 05:44:10 AM
Old 04-05-2011
Converting date DD MM YYYY to DD MON YYYY

Hello,

I am writing a script that parses different logs and produces one. In the source files, the date is in DD MM YYYY HH24:MI:SS format. In the output, it should be in DD MON YYY HH24:MI:SS (ie 25 Jan 2010 16:10:10)
To extract the dates, I am using shell substrings, i.e.:

Code:
read line
 
year=${line:8:4}
month=${line:5:2}
day=${line:2:2}
hour=${line:13:2}
min=${line:16:2}
sec=${line:19:2}
 
echo "$year$month$day$hour$min$sec" # prints something like 20110325161610 (I use this numeric value to compare it agains reference date, i.e. date when this script ran last time)
 
if [ "$year$month$day$hour$min$sec" -gt "$lastlog" ]
then
  # output date in DD MON FORMAT... how?
fi

Of course I can do a routine like: if mon = 01 then mon = 'JAN', if mon = 02 then mon = 'FEB'... But I guess there must be a nicer solution to this. Maybe solution that will take into account also LANG setting (not a requirement, but would like to have it).

Maybe date function can be used for that, but I did not figure out how to pass the -d parameter (what format should it be in?). Did not find much in FAQ: Date Arithmetics either Smilie
 

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HTML::FormHandler::Field::Date(3pm)			User Contributed Perl Documentation		       HTML::FormHandler::Field::Date(3pm)

NAME
HTML::FormHandler::Field::Date - a date field with formats VERSION
version 0.40013 SUMMARY
This field may be used with the jQuery Datepicker plugin. You can specify the format for the date using jQuery formatDate strings or DateTime strftime formats. (Default format is format => '%Y-%m-%d'.) d - "%e" - day of month (no leading zero) dd - "%d" - day of month (two digit) o - "%{day_of_year}" - day of the year (no leading zeros) oo - "%j" - day of the year (three digit) D - "%a" - day name short DD - "%A" - day name long m - "%{day_of_month" - month of year (no leading zero) mm - "%m" - month of year (two digit) "%m" M - "%b" - month name short MM - "%B" - month name long y - "%y" - year (two digit) yy - "%Y" - year (four digit) @ - "%s" - Unix timestamp (ms since 01/01/1970) For example: has_field 'start_date' => ( type => 'Date', format => "dd/mm/y" ); or has_field 'start_date' => ( type => 'Date', format => "%d/%m/%y" ); You can also set 'date_end' and 'date_start' attributes for validation of the date range. Use iso_8601 formats for these dates ("yyyy-mm- dd"); has_field 'start_date' => ( type => 'Date', date_start => "2009-12-25" ); Customize error messages 'date_early' and 'date_late': has_field 'start_date' => ( type => 'Date, messages => { date_early => 'Pick a later date', date_late => 'Pick an earlier date', } ); If form has 'is_html5' flag active it will render <input type="date" ... /> instead of type="text" AUTHOR
FormHandler Contributors - see HTML::FormHandler COPYRIGHT AND LICENSE
This software is copyright (c) 2012 by Gerda Shank. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. perl v5.14.2 2012-06-25 HTML::FormHandler::Field::Date(3pm)
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