cyrobinson
asked on
read a file and replace certain lines
All,
How would I read through a file and replace lines that contain a certain word?
e.g.
The following test file is in existence
name, age, interests
bill, 30 , Football
Mark, 15 , Computers
Jill, 10 , Nothing!
If I wanted to loop through this file and replace the line containing Mark's age and interests with something else how would I go about that?
How would I read through a file and replace lines that contain a certain word?
e.g.
The following test file is in existence
name, age, interests
bill, 30 , Football
Mark, 15 , Computers
Jill, 10 , Nothing!
If I wanted to loop through this file and replace the line containing Mark's age and interests with something else how would I go about that?
ahoffmann
perl -i.bak -pe 's/Mark/whatever/' file
If you want to change Marks age to 35 and his interests to Women, you could try sample below.
Just paste the line into a DOS prompt. Change filename from data.txt to correct filename in your system.
perl -i.bak -pe "s/Mark,(\s*)\d*(\s*),(\s*
If you don't need to preserve the spaces you could try the somewhat simpler line below instead.
perl -i.bak -pe "s/Mark,.*/Mark,35,Women/"
Just paste the line into a DOS prompt. Change filename from data.txt to correct filename in your system.
perl -i.bak -pe "s/Mark,(\s*)\d*(\s*),(\s*
If you don't need to preserve the spaces you could try the somewhat simpler line below instead.
perl -i.bak -pe "s/Mark,.*/Mark,35,Women/"
ASKER
i was more wanting to loop over each line of an input file from within a perl script and modify each line like that
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> was more wanting to loop over each line of an input file from within a perl script and modify each line like that
This is exactly what my suggestion does :-)
This is exactly what my suggestion does :-)