Alfred Vahau wrote:
>
> I agree. As an extention, the one liner can be used to insert a period.
> For example
>
> 011001 to 01.1001
>
> perl -pi -e's/^(\d{2})/\1\./' yourfile.txt
^^^^
The \1 form of backreference is deprecated, you should use $1 instead.
Periods in strings don't have to be escaped.
perl -pi -e's/^(\d\d)/$1./' yourfile.txt
Or you could do it like this:
perl -pi -e's/(?<=^\d\d)/./' yourfile.txt
John
--
use Perl;
program
fulfillment
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