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Old 09-17-2009, 03:02 AM   #1
kicap
LQ Newbie
 
Registered: Nov 2004
Posts: 3

Rep: Reputation: 0
Looping and Grouping the values


Hi all

I need someone help and appreciated if you guys can hands on me.

I have txt file that contains a value 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12

and i just want to group all of them following this format;

a:1, 2, 3, 4
b:5, 6, 7, 8
c:9, 10, 11, 12

and i have write a script like this;

#!/bin/sh

file=test.csv;
var=`cat $file`

LIMIT=3
i=0

while [ "$i" -lt "$LIMIT" ]
do

i=$(($i+1))
echo -n a:"$i "
if [ $i -eq $LIMIT ]
then
i=$(($i+1))
echo -n b:"$i "
fi
i=$(($i+1))
echo c:$i
done

But still cannot create an output that i needed. Hope someone here can help me to figured it out..

Million Thanks
 
Old 09-17-2009, 03:32 AM   #2
lutusp
Member
 
Registered: Sep 2009
Distribution: Fedora
Posts: 835

Rep: Reputation: 102Reputation: 102
Quote:
Originally Posted by kicap View Post
Hi all

I need someone help and appreciated if you guys can hands on me.

I have txt file that contains a value 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12

and i just want to group all of them following this format;

a:1, 2, 3, 4
b:5, 6, 7, 8
c:9, 10, 11, 12

and i have write a script like this;

#!/bin/sh

file=test.csv;
var=`cat $file`

LIMIT=3
i=0

while [ "$i" -lt "$LIMIT" ]
do

i=$(($i+1))
echo -n a:"$i "
if [ $i -eq $LIMIT ]
then
i=$(($i+1))
echo -n b:"$i "
fi
i=$(($i+1))
echo c:$i
done

But still cannot create an output that i needed. Hope someone here can help me to figured it out..

Million Thanks
Try this:

Code:
data=(`cat data.txt`)

i=0
rowlength=4

while [ $i -lt ${#data[*]} ]
do
   echo -n "${data[$i]} "
   [ $((++i % rowlength)) -eq 0 ] && echo ""
done
BUT ... this script has a bug, and I want you to discover what it is and fix it. If you don't, your instructor (who gave you this homework assignment) will know you got this from the Web and didn't bother to check it carefully enough. And who knows where that might lead -- you might end up living in a trailer with a very fat partner and 14 dogs, listening to Country & Western music. (shudder)
 
  


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