I Sed, she sed - Page 2

Goose · 23-06-2008, 16:15

*click* bought.

LeperousDust · 23-06-2008, 16:23

Jesus, that actually looks foreign to me...

Goose · 23-06-2008, 16:48

Book shmook, got there in the end.

Still, it's a handy thing to learn.

Goose · 07-10-2008, 10:09

Quote:

Originally Posted by Mark

The fact you can have more than one pattern per line caused me some major grief, but if it's OK to use sed twice, then I managed to get around that one:

Code:

sed '/\(<<[^<>]*>>\)/s//\n\1\n/g' | sed '/^<<\([^<>]*\)>>$/s//\1/p;d'

The first sed breaks out the <<...>> so that each is split out onto a line by itself, then the second one picks out just those lines.

Just realised this screws up when it comes across something like:

Code:

abcdefgh<<ijklmno>pqrst>>uvwxyz
abcdefgh<<ijklmno<pqrst>>uvwxyz

Mark · 07-10-2008, 11:19

You may have reached the limits of what sed can do for you there. It'll also break with this one:

Code:

abcdefgh<<ijklmno<>pqrst>>uvwxyz

Goose · 07-10-2008, 11:21

Any suggestions, Mr Mark? I think I need to buy you a pub...

Mark · 07-10-2008, 11:31

Windows or Linux? There's a way to cheat it that I hadn't thought of before, but I'll have to put it into a script as it uses unprintable characters.

Goose · 07-10-2008, 11:33

Linux. Any suggestions would be more than welcome.

Mark · 07-10-2008, 11:45

OK - one more.

If I gave it:

Code:

abcdefg<<<<hijkl>>mno>>pqrstuvwxyz

Would the answer 'hijkl' be OK, or do you want '<<hijkl>>mno', or is that just a case of 'never going to happen'?

I've solved all the other cases, but this one might resist.

Goose · 07-10-2008, 11:55

It'd never exist. The '<<' and '>>' will always match, there may be more than 1 per line, they would never overlap, and there may be single '<' and '>' in each.

23-06-2008, 16:15	#11
Goose The list is long, but distinguished Join Date: Dec 2006 Location: Århus, Denmark Posts: 1,643	click bought. __________________

23-06-2008, 16:23	#12
LeperousDust Bananaman Join Date: Jul 2006 Location: Liverpool/Edinburgh Posts: 4,817	Jesus, that actually looks foreign to me... __________________

23-06-2008, 16:48	#13
Goose The list is long, but distinguished Join Date: Dec 2006 Location: Århus, Denmark Posts: 1,643	Book shmook, got there in the end. Still, it's a handy thing to learn. __________________

07-10-2008, 11:19	#15
Mark Screaming Orgasm Join Date: Jul 2006 Location: Newbury Posts: 15,194	You may have reached the limits of what sed can do for you there. It'll also break with this one: Code: abcdefgh<<ijklmno<>pqrst>>uvwxyz

07-10-2008, 11:21	#16
Goose The list is long, but distinguished Join Date: Dec 2006 Location: Århus, Denmark Posts: 1,643	Any suggestions, Mr Mark? I think I need to buy you a pub... __________________

07-10-2008, 11:31	#17
Mark Screaming Orgasm Join Date: Jul 2006 Location: Newbury Posts: 15,194	Windows or Linux? There's a way to cheat it that I hadn't thought of before, but I'll have to put it into a script as it uses unprintable characters.

07-10-2008, 11:33	#18
Goose The list is long, but distinguished Join Date: Dec 2006 Location: Århus, Denmark Posts: 1,643	Linux. Any suggestions would be more than welcome. __________________

07-10-2008, 11:45	#19
Mark Screaming Orgasm Join Date: Jul 2006 Location: Newbury Posts: 15,194	OK - one more. If I gave it: Code: abcdefg<<<<hijkl>>mno>>pqrstuvwxyz Would the answer 'hijkl' be OK, or do you want '<<hijkl>>mno', or is that just a case of 'never going to happen'? I've solved all the other cases, but this one might resist.

07-10-2008, 11:55	#20
Goose The list is long, but distinguished Join Date: Dec 2006 Location: Århus, Denmark Posts: 1,643	It'd never exist. The '<<' and '>>' will always match, there may be more than 1 per line, they would never overlap, and there may be single '<' and '>' in each. __________________