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Full Discussion: perl sorting
Top Forums Shell Programming and Scripting perl sorting Post 302167731 by joeyg on Friday 15th of February 2008 11:06:32 AM
Old 02-15-2008
a unix command would be

>sort rawfile -t'|' -k1.21,1.30 -r
Carl________15_X_Way____A004________LX
Will________2_A_St______A003________LX
Benny_______5_Spring____A002________LX
Joe_________12_Main_St__A001________LX


and that ordered my file reverse by what is in positions 21-30.
I did this by:
(a) specifying the 'tab' or key flag as the '|' which does not exist; thus all is considered field 1
(b) said to sort on k1.21,1.30 which translated to field one positions 21 to 30
(c) and the -r put in reverse order

So in perl, I figure somehow I need to define that I want to use character positions 21-30 as the key field. Then give a command to sort on those positions.
Perhaps this needs to be its own subroutine. I do not know.
 

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locale(3pm)						 Perl Programmers Reference Guide					       locale(3pm)

NAME
locale - Perl pragma to use or avoid POSIX locales for built-in operations SYNOPSIS
@x = sort @y; # Unicode sorting order { use locale; @x = sort @y; # Locale-defined sorting order } @x = sort @y; # Unicode sorting order again DESCRIPTION
This pragma tells the compiler to enable (or disable) the use of POSIX locales for built-in operations (for example, LC_CTYPE for regular expressions, LC_COLLATE for string comparison, and LC_NUMERIC for number formatting). Each "use locale" or "no locale" affects statements to the end of the enclosing BLOCK. Starting in Perl 5.16, a hybrid mode for this pragma is available, use locale ':not_characters'; which enables only the portions of locales that don't affect the character set (that is, all except LC_COLLATE and LC_CTYPE). This is useful when mixing Unicode and locales, including UTF-8 locales. use locale ':not_characters'; use open ":locale"; # Convert I/O to/from Unicode use POSIX qw(locale_h); # Import the LC_ALL constant setlocale(LC_ALL, ""); # Required for the next statement # to take effect printf "%.2f ", 12345.67' # Locale-defined formatting @x = sort @y; # Unicode-defined sorting order. # (Note that you will get better # results using Unicode::Collate.) See perllocale for more detailed information on how Perl supports locales. perl v5.16.2 2012-10-11 locale(3pm)
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