2010/6/26 Jenda Krynicky <je...@krynicky.cz>:
> From: mrwawa <wade.w...@gmail.com>
>> That is correct. I decided to just write the output to a separate
>> file and then delete the original file. Thanks for all your help.
>>
>> Wade
>
> That's all you can do. If you just wanted to change a few characters
> you could open the file for read&write (open my $IN, '<+', $file or
> ...), but since you need to insert characters you have to create a
> new file and copy the data, you can't expect the system to magicaly
> shift the data after the row you amended.
Or this might work:
$ cat foo
A:BC:D
$ perl -F: -i.bak -lane '
if ($#F == 2) {
@foo=split(//,$F[1]) ;
@F=($F[0], @foo, $F[2])
} ;
print join(":", @F) ;
' foo
$ tail -v -n +1 foo*
==> foo <==
A:B:C:D
==> foo.bak <==
A:BC:D
Haven't tried it on a large file, so YMMV.
Regards,
- Robert
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