I am a newbie and heard from someone that using awk command doesn't workout right sometimes when we have while and for loops...but for me as of now it works fine without any problem...
Awk doesn't mysteriously stop working inside while loops, no.
I can only guess what your friend meant, but I'm assuming the lesson intended was "Don't run awk 30,000 times to process 10,000 lines". And that is certainly correct, not to mention an error I see new shell programmers making a lot. They see awk used to get a column and think "Oh, that's what awk is for", and use it everywhere. Things like ...
...are extremely silly. Whenever get asked 'why is my script slow', they're doing that.
Better way to do it would be
so you run awk 0 times instead of 30,000, and sed 0 times instead of 10,000...
But I'm using awk to process entire files. Nothing silly about that.
Last edited by Corona688; 09-06-2012 at 02:50 PM..
These 2 Users Gave Thanks to Corona688 For This Post:
Hi,
I have some text files. I need a separate shell say 1.sh in which i can open a particular text file and compare with another txt file. For example:
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apple
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lion
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This code is just to help me learn. It serves no purpose other than that.
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Jackie Chan,1954,M
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I've two files with data like below:
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AAA,Apples,123
BBB,Bananas,124
CCC,Carrot,125
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Store2|BBB|124|23
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Hi,
I need to compare two text files with awk.
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-------
chr1 43815007 43815009 COSM19193 REF=TG;OBS=AA;ANCHOR=G AMPL495041
chr1 43815008 43815009 COSM18918 REF=G;OBS=T;ANCHOR=T AMPL495041
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Hi Guys ,
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Source File
*************
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Discussion started by: sarathy_a35
4 Replies
LEARN ABOUT REDHAT
igawk
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)