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Full Discussion: awk - change variable on fly
Top Forums UNIX for Dummies Questions & Answers awk - change variable on fly Post 302627683 by haczyk on Saturday 21st of April 2012 08:52:45 AM
Old 04-21-2012
my script:
# grep -v ^# letsgo.sh
DateStart="2012/01/01"
DateEnd="2012/04/15"
start=`date +%s -d "$DateStart"`
end=`date +%s -d "$DateEnd"`
gawk -F '^"|","|"$' -v start=$start '{cmd="date +%s -d \"" $10 "\""; cmd | getline current; close(cmd)} current > start ' file.csv > temp.file
# grep -v ^# letsgo.sh

my basic file contains very similiar records like below:

Code:
# cat lol.tmp
"aaaaa","bbbbbb","ccccc","ddddd,eeeee","ffffff","ggggg","3","2012/02/22 12:25:21","2012/02/22 00:00:00","8","hhhh","iiii"
#

I need to count records which have second date (in above example it is "2012/02/22 00:00:00") between given dates (variables $end and $start) and redirect result to temporary file for future modifications.

I saw ready scripts for compare dates (loop in loop), but I thought it will be faster to change dates into unix timestamp and compare. I guess awk is a best tool to such operation, but now I have doubts ;/

If you have better idea - I am willing to listen Smilie

Thanks in advance for any tips.

Kind regards
 

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
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