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Top Forums Shell Programming and Scripting Want to grep records in alphabetical order from a file and split into other files Post 302950511 by shekhar_4_u on Sunday 26th of July 2015 12:05:45 AM
Old 07-26-2015
Quote:
Originally Posted by RudiC
This proposal is nice and short and solves the problem, but in case (large chunks of) the input file is sorted, it performs too many unnecessary file open/close operations. Try a small adaption:
Code:
awk '
NF      {TMP=substr($1,1,1)".txt"
         if (FN && FN != TMP) close (FN)                 
         FN=TMP
         print >> FN
        }
' file


Thanks..It worked like a magic Smilie


Could you please explain the logic as well? I never used FN in awk so it will be a learning for me.Smilie

Last edited by shekhar_4_u; 07-26-2015 at 01:17 AM..
 

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SHTOOL-TABLE.TMP(1)					      GNU Portable Shell Tool					       SHTOOL-TABLE.TMP(1)

NAME
shtool-table - GNU shtool pretty-print a field-separated list SYNOPSIS
shtool table [-F|--field-sep sep] [-w|--width width] [-c|--columns cols] [-s|--strip strip] strsepstr... DESCRIPTION
This pretty-prints a list of strings as a table. OPTIONS
The following command line options are available. -F, --field-sep sep Separate columns using sep. Default is ":". -w, --width width Width of each column. Default is 15 characters. -c, --columns cols Number of columns. Default is 3. -s, --strip strip Strip off any characters past strip. Default is 79. EXAMPLE
# shell script shtool table -F , -w 5 -c 4 "1,2,3,4,5,6,7,8,9,10,11,12" HISTORY
The GNU shtool table command was originally written by Ralf S. Engelschall <rse@engelschall.com> in 1999 for GNU shtool. SEE ALSO
shtool(1), tr(1), fmt(1), sh(1), awk(1), sed(1). 18-Jul-2008 shtool 2.0.8 SHTOOL-TABLE.TMP(1)
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