Jess Balint wrote at Fri, 12 Jul 2002 20:03:58 +0200:

> You need '?';
> 
> echo 123 | perl -pe 's/(\d?)(\d)/$1.$2/g'
> 

That doesn't really work.
Look at 

echo 123456 | perl -pe 's/(\d?)(\d)/$1.$2/g'

what prints

1.23.45.6


Cheerio,
Janek


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