Looping and Grouping the values

kicap · 09-17-2009, 02:02 AM

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

lutusp · 09-17-2009, 02:32 AM

Quote:

Originally Posted by kicap

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)