IFS(Internal Field separator)


 
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# 1  
Old 03-27-2014
IFS(Internal Field separator)

Hi All,

I need your small help in using IFS.

I am using it like below but i am not getting the desired output.

Code:
var=ABCD,EFGH,IJKL,MNOP,QRST
export IFS=","
for x in $var
do
if [[ $GP == "" ]]
then
temp="Group_$x"
GP=${!temp}
else
temp="Group_$x"
MP="${!temp}"
GP="$GP","$MP"
 
fi
done
echo $GP

Seems IFS also applies on $GP whereas i want the output(GP) separted by comma(,)


Desired Output:
Model output is (valueof)ABCD, (valueof)EFGH, (valueof)IJKL, (valueof)MNOP

Obtained output:
(valueof)ABCD (valueof)EFGH (valueof)IJKL (valueof)MNOP

Any help !! Thanks in advance!

Last edited by prasanna2166; 03-27-2014 at 05:53 AM..
# 2  
Old 04-02-2014
Try changing the last line in your script from:
Code:
echo $GP

to:
Code:
echo "$GP"

and changing the line:
Code:
GP="$GP","$MP"

to:
Code:
GP="$GP,$MP"


Last edited by Don Cragun; 02-05-2018 at 08:50 AM.. Reason: Add 2nd script change.
# 3  
Old 04-02-2014
Another method is to save/restore IFS
Code:
var=ABCD,EFGH,IJKL,MNOP,QRST
oldIFS=$IFS
IFS=","
for x in $var
do
if [[ $GP == "" ]]
then
temp="Group_$x"
GP=${!temp}
else
temp="Group_$x"
MP="${!temp}"
GP="$GP","$MP"
fi
done
IFS=$oldIFS
echo $GP


Last edited by MadeInGermany; 04-02-2014 at 06:10 AM.. Reason: removed unwanted line break
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