Quote from: grondilu on December 28, 2010, 03:14:55 PM

Quote from: pj on December 28, 2010, 02:53:55 PM

Code:

...
sed 's/\([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\)\.\([0-9][0-9]*\)/\1:\2/g' |
...

omg your regex is ugly.

Code:

sed -r 's/([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)\.([0-9]+)/\1:\2/g' |

And I'm pretty sure there is better.

But sed -r is not available on all sed commands. I wanted something portable. Granted, I have no example of a sed command that presently lacks it. I just know that extended regular expression support was added (to sed and anything else) sometime after such commands first existed, so I studiously avoid using extended regular expressions in situations where portability to unknown runtime environments is desired.

If one uses sed -r, then I suppose a better (well, shorter anyway) expression would be:

Code:

sed -r 's/(([0-9]+\.){3}[0-9])\.([0-9])/\1:\3/g'