Remove Particular character in file

palani.ec · 01-09-2013, 07:47 AM

How i can remove the character.
a/aj/ajay.
a/aj/ajay.ya
a/aj/ajay.yadav
i want to remove a/aj/
pls help.

TB0ne · 01-09-2013, 08:35 AM

Quote:

Originally Posted by palani.ec

How i can remove the character.
a/aj/ajay.
a/aj/ajay.ya
a/aj/ajay.yadav
i want to remove a/aj/
pls help.

Spell out your words, please. And you don't really say much about your requirements (doing this in bash? Perl? Ruby? Python?), but a simple sed command can do it. There are many tutorials you can find on Google, and there is MUCH to learn about sed, but a basic character delete is trivial...bear in mind that you can remove the "/" by escaping it with backslashes, which will make sed treat it as a normal character, rather than as part of the interpreter command.

Code:

cat <filename> | sed 's/a\/aj\///g' > output.filename

Other ways to do it, but you can research those on your own.

David the H. · 01-09-2013, 04:42 PM

Even better, just use a different delimiting character. And we can remove the Useless Use Of Cat.

BTW, if all the strings are at the beginning of the line, as they seem to be, it might also be wise to bind the regex to the start too.

Code:

sed 's|^a/aj/|/|' infile >outfile

Use the -i option (gnu sed) to edit the input file in place, instead of redirecting it to a new file.

RaviTezu · 01-09-2013, 09:55 PM

Hi palani.ec,
Lets assume file1 is having your content,
i.e $cat file1
a/aj/ajay.
a/aj/ajay.ya
a/aj/ajay.yadav

The following perl command will do the required work simply:

Quote:

perl -pi -w -e 's/a\/aj\///g' file1

You can even replace the file1 with the file's path.
Good luck

palani.ec · 01-10-2013, 06:19 AM

Thanks for reply,

i want to remove before /(special character)
Input is
a/am/amare
b/bb/pals

Output should be:
amare
pals

TB0ne · 01-10-2013, 08:47 AM

Quote:

Originally Posted by palani.ec

Thanks for reply,
i want to remove before /(special character)
Input is
a/am/amare
b/bb/pals

Output should be:
amare
pals

You have changed the requirement from your first post, and you still haven't said how you want to do this (language? ANYTHING?). Again, a sed would be:

Code:

sed -re 's/^.+\///' infile >outfile

Quote:

Originally Posted by David the H.

And we can remove the Useless Use Of Cat.

Hehe...I was leaving that as an exercise for the user.

palani.ec · 01-10-2013, 11:32 AM

Hi Friends,
Input is
a/am/amare
b/bb/pals

I want remove
a/am/
and
b/bb/

i need output like
amare
pals

TB0ne · 01-10-2013, 11:49 AM

Quote:

Originally Posted by palani.ec

Hi Friends,
Input is
a/am/amare
b/bb/pals

I want remove
a/am/
and
b/bb/

i need output like
amare
pals

Right..that's what you posted before, several times. You have not added any new information, or answered the questions you were asked. Asking the same question multiple times doesn't get you different answers.

And did you not read/understand post #6, where I told you how to do it???