Append string in all rows

Rock · #1 (**permalink**) 11-30-2006

I would like to append a string at the end of each row of a .dat file.
please give me some advice? Thanks.

e.g.
#content in abc.dat
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
...

#after running the script/command, "bbbbbbbbbb" will be appended as follow.
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaabbbbbbbbbb
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaabbbbbbbbbb
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaabbbbbbbbbb
...

spoodie · #2 (**permalink**) 11-30-2006

It is just me or does this look like an exam question?

Rock · #3 (**permalink**) 12-01-2006

I have writen a simple script to arhieve my purpose. However, "There is not enough memory available now" is prompted. Can my script be optimized to reduce resource? Thanks.

append_string=`cat ${source_file} | awk ' BEGIN { FS = "\n" } { if ($1 ~ "SWIFT5" ) {print $1, " :: SEND = N :: SEV = 0 :: ERROR = 11414 :: COMP = Name :: "
} else {print $1;} }'`

vino · #4 (**permalink**) 12-01-2006

Here is a sed solution.

Code:

str="string to be attached"
sed -e "s/.*/&$str/g" input.txt

ghostdog74 · #5 (**permalink**) 12-01-2006

A Python alternative

Code:

#!/usr/bin/python
string_to_attach = "a string to attach"
for line in open("yourfile"):
    line = line.strip()
    print "%s%s" %( line, string_to_attach )

prompt:

Code:

# python test.py > outfile

Rock · #6 (**permalink**) 12-01-2006

For the sed solution,

The Pattern is constructed with a variable string inside a text.
e.g.
aaa123aaa
aaa4 5aaa
aaa678aaa

sed -e "s/aaa*aaa/&$str/g" ${source_file}

Why I can't use "*" to find the pattern?

vino · #7 (**permalink**) 12-01-2006

Quote:

Originally Posted by Rock

For the sed solution,

The Pattern is constructed with a variable string inside a text.
e.g.
aaa123aaa
aaa4 5aaa
aaa678aaa

sed -e "s/aaa*aaa/&$str/g" ${source_file}

Why I can't use "*" to find the pattern?

I didnt quite get what you are looking for.

str should contain the string you want to append.

Does this help ?

Code:

sed -e "s/aaa.*aaa/&$str/g" ${source_file}

More UNIX and Linux Forum Topics You Might Find Helpful
Thread	Thread Starter	Forum	Replies	Last Post
Parsing String, Search then display rows	buddyme	UNIX for Advanced & Expert Users	9	04-27-2008 04:43 AM
How to append a Value to all the rows in a file	dsshishya	Shell Programming and Scripting	2	03-20-2008 05:04 PM
append a string to a grep result	melanie_pfefer	Shell Programming and Scripting	8	03-19-2008 07:19 AM
Need to append file name to all rows in in .csv file	Satyagiri	Shell Programming and Scripting	3	10-13-2006 02:32 AM
append esc string	beilstwh	Shell Programming and Scripting	2	05-11-2005 01:33 PM

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes	Rate This Thread
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode	Rate This Thread: