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Full Discussion: convoluted code
The Lounge War Stories convoluted code Post 302666535 by jgt on Wednesday 4th of July 2012 04:13:33 PM
Old 07-04-2012
convoluted code
Hi,
I have been thinking of how to script this but i have no clue at all..
Could someone please help me out or give me some idea on this?
I would like to group those lines with the same first variable in each line, joining the 2nd variables with commas.
Let's say i have the following input.
Code:
aa c1
aa c2
aa c3
cc d1
dd e1
dd e2
ee f1

I would like the output to be like this.
Code:
aa c1,c2,c3
cc d1
dd e1,e2
ee f1

Could this be easily done with bash script?
Or should i try perl script then?
I'm a beginner in bash script and perl.
Thank you.

***************************
Try this

Code:
first="Y"                
while read a b           
do                       
if [ "$first"  =  "Y"  ] 
then                     
   first="N"             
   prev=$a               
   echo "$a $b\c"        
else                     
if [ "$a" != "$prev" ]   
then                     
   echo "\n$a $b\c"      
   prev=$a               
else                     
   echo ",$b\c"          
fi                       
fi                       
done

This assumes that the input file is sorted.

********************************************************
Sorry.. don't understand..
what is a, b , F ..?
Anyway i found a short solution.
${input} is the filename for the input file.
Code:
for m in `cat ${input} | awk '{print $1}' | sort | uniq `
do
        var=`grep "^${m} " ${output} | awk '{print $2}' | tr '\n' ',' | sed '$s/,$//'`
        echo "${m} ${var}"
done

These 2 Users Gave Thanks to jgt For This Post:
methyl Neo
 

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LEARN ABOUT DEBIAN

ppix::regexp::structure::code

PPIx::Regexp::Structure::Code(3pm)			User Contributed Perl Documentation			PPIx::Regexp::Structure::Code(3pm)

NAME

       PPIx::Regexp::Structure::Code - Represent one of the code structures.

SYNOPSIS

	use PPIx::Regexp::Dumper;
	PPIx::Regexp::Dumper->new( 'qr{(?{print "hello sailor
")}smx' )
	    ->print();

INHERITANCE

       "PPIx::Regexp::Structure::Code" is a PPIx::Regexp::Structure.

       "PPIx::Regexp::Structure::Code" has no descendants.

DESCRIPTION

       This class represents one of the code structures, either

	(?{ code })

       or

	(??{ code })

METHODS

       This class provides no public methods beyond those provided by its superclass.

SUPPORT

       Support is by the author. Please file bug reports at <http://rt.cpan.org>, or in electronic mail to the author.

AUTHOR

       Thomas R. Wyant, III wyant at cpan dot org

COPYRIGHT AND LICENSE

       Copyright (C) 2009-2012 by Thomas R. Wyant, III

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl 5.10.0. For more details, see the full
       text of the licenses in the directory LICENSES.

       This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of
       merchantability or fitness for a particular purpose.

perl v5.14.2							    2012-06-06					PPIx::Regexp::Structure::Code(3pm)
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