Trouble with awk command

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# 1  
Old 01-08-2014
Trouble with awk command


I need to read a string with ; separated using loop one filed by one field and perform some operation. Can you please check and let me know how to print command parameterised.

number_of_keys=`echo $key|awk '{print NF}' FS=';'`
for (( i = 1; i <= $number_of_keys; i++ ));
key=`echo $KEY_TO_COMPARE|awk 'BEGIN { FS = ";" } ; {print $i}'`
cat /home/t.txt| grep -i $key >> temp.txt

content of /home/t.txt
a ais bad
phani is good
kiran is bad

# 2  
Old 01-08-2014
modified your code
number_of_keys=$(echo $key|awk '{print NF}' FS=';')
for (( i = 1; i <= $number_of_keys; i++ ));
key=$(echo $KEY_TO_COMPARE|awk -v var=i 'BEGIN { FS = ";" } ; {print $var}')
grep -i $key /home/t.txt >> temp.txt

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# 3  
Old 01-08-2014

echo $key | tr ';' '\n' > keys.lst
grep -if keys.lst /home/t.txt > temp.txt

hope this helps Smilie
This User Gave Thanks to PikK45 For This Post:
# 4  
Old 01-08-2014
Use parameter substitution instead. Assuming there are no blank space separated values in key:

for k in ${key//;/ }
        grep -i "$k" /home/t.txt
done > temp.txt

This User Gave Thanks to Yoda For This Post:
# 5  
Old 01-08-2014
grep -if <(IFS=\;; printf "%s\n" $key) file

This User Gave Thanks to Scrutinizer For This Post:
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