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Top Forums Shell Programming and Scripting Sorting group of records and loading last record Post 302932357 by RudiC on Wednesday 21st of January 2015 05:21:43 AM
Old 01-21-2015
Were it a fixed width file, things would be much simpler. The following does work on your sample but will fail if positions of spaces and fields shift:
Code:
sort -t. -k1.1,1.3n -k1.14r file4 | sort -uk1.1,1.3
101newjersyus 20150110
102boston   us 20140106

 

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CSSORT(1p)						User Contributed Perl Documentation						CSSORT(1p)

NAME
cssort -- Czech sort FORMAT
cssort [ "-c"list | "-f"list ["-d"regexp]] [files ...] SYNOPSIS
cssort -c10-15,50-,25-45 < file cssort -f3,5-6 < file cssort -f3,5-6 -s: < file DESCRIPTION
Cssort is a utility that sorts input lines according to rules used in the Czech language. You can run it without any options, then it just uses whole lines for sorting. With the options, it's possible to specify parts of the lines to be used for comparison. list A comma-separated list of integer field numbers or field ranges. The are indexed from 1 and if a range is open (eg. "5-"), it means all remaining fields from the starting number. -c Stands for columns and the list that follows specifies byte ranges on the line. You will probably use this option to sort data with fixed width fields. -f Fields that will be used for sort. -d Delimiter that separates fields in the -f option. It is a Perl regular expression, the default is "[ ]+", which means any number of spaces or tabs in a row. The program assumes ISO-8859-2 encoding. Some way to specify another input encoding will come in the next versions. If you need to sort files with different encodings, you might want to check the cstocs conversion utility. SEE ALSO
Cz::Sort(3), cstocs(1). AUTHOR
Jan Pazdziora, adelton@fi.muni.cz. perl v5.10.1 2010-01-16 CSSORT(1p)
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