AWK - insert

Author

insert

narsman

2005-02-01, 8:55 pm

Hi all,

Let's say you have 2 text files called file_A & file_B. I want to insert
the contents of file_B somewhere in the middle of file_A. How do you do
this? The only thing I could think of is by using the sed-insert command.
Would 'awk' be easier?

Thanks,
Narsman

Ed Morton

2005-02-02, 3:56 am

narsman wrote:

> Hi all,
>
> Let's say you have 2 text files called file_A & file_B. I want to insert
> the contents of file_B somewhere in the middle of file_A. How do you do
> this? The only thing I could think of is by using the sed-insert command.
> Would 'awk' be easier?

Don't know about easier, but this is one way:

awk 'NR==FNR{lines[++nr]=$0;next}
FNR==18 { for (i=1; i<=nr; i++) print lines[i] }
{ print }' file_B file_A

The above would insert file_B before line 18 of file_A. Wouldn't be a
great solution for large files given your storing the whole of file_B in
an array. There's various other awk solutions but:

<OT>
The equivalent to the above is trivial in shell:

head -17 file_A
cat file_B
tail +18 file_A

for more info on shell solutions, including sed or perl, go to
comp.unix.shell.
</OT>

Regards,

Ed.

John Savage

2005-02-04, 3:55 pm

"narsman" <narciso@compsus.com> writes:
>Let's say you have 2 text files called file_A & file_B. I want to insert
>the contents of file_B somewhere in the middle of file_A. How do you do

Depends on your "somewhere". To insert contents of file2 after line 3
of file1: sed '3r file2' file1

To insert between the third and fourth words on line 3, for example, would
be a bit more complicated in pure sed.
--
John Savage (my news address is not valid for email)

narsman

2005-02-04, 8:55 pm

Hey Guys,
Thanks for the help. It worked well.

William James

2005-02-04, 8:55 pm

BEGIN { ip=5;ARGV[ARGC++]=ARGV[1];iname=ARGV[2]}

NR<ip
FILENAME==iname {print;x=1;next}
x&&FNR>=ip

William James

2005-02-04, 8:55 pm

BEGIN {ip=5;ARGV[ARGC++]=ARGV[1]}
NR==ip {x=2;nextfile}
x-=FNR==1 || FNR>=ip

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