10-11-2003 19:58									#1
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I'm trying to use sed, and it asks me to print all lines where b-days are in November or December. The way the input file is set up,

sed -n '/^[^:]*:[^:]*:[^:]*:11/p' databook

gives me the b-days in november, i just don't know how to make it do an "or" to get both. any ideas?

	10-11-2003 20:36									#2
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I dunno how to do this portably, but in GNU sed you can use \| to match "either", like so:

/^[^:]*:[^:]*:[^:]*:\(11\)\|\(12\)/p

	10-11-2003 21:06									#3
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Thankyou for reminding me why I never have used Linux...

	10-11-2003 21:10									#4
	Avatar Enlargement: We've got the solution

Just because you're not l33t enough...

	10-11-2003 21:40									#5
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quote: Originally posted by Provost Harrison Thankyou for reminding me why I never have used Linux...

That's just a regular expression. Not more complicated than most of the biochem stuff.

	10-11-2003 21:43									#6
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paul hanson
provost harrison

both with eu markings...

confusing.

	10-11-2003 21:46									#7
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You think that's bad? We both spend a lot of time in the same city as well.

	10-11-2003 22:49									#8
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God I'm so glad I'm back to WinXP

	10-11-2003 23:01									#9
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thanks

	11-11-2003 08:35									#10
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quote: Originally posted by Whaleboy God I'm so glad I'm back to WinXP

For what? You don't need to know regex to use *nix.

	11-11-2003 14:11									#11
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Ah, of course, Doing it this way you don't need GNU extensions, AFAICT:

/^[^:]*:[^:]*:[^:]*:1[12]/p

Every time I use nonstandard extensions (such as the stuff GNU has added to so many *nix tools) anywhere I hear a little BSD daemon shouting at me about hypocrisy...

	11-11-2003 14:18									#12
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Out of curiosity, would this also work?

/^(.*?:){3}1[12]/p

SP

Last edited by Fve Crathva on 11-11-2003 at 15:18

	11-11-2003 15:47									#13
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quote: Originally posted by Paul Hanson Just because you're not l33t enough...

That is true, I am always on time

	11-11-2003 15:52									#14
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quote: Originally posted by Paul Hanson You think that's bad? We both spend a lot of time in the same city as well.

Except you spend your weekdays in Hull working (well, uni) and home in Lincolnshire on the weekends, whereas I spend my weekdays in Lincolnshire working and my weekends at home in Hull

	11-11-2003 15:55									#15
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Well, I'm actually spending more time in Hull this year. Not because I've developed an affinity for the place, but because my family drive me nuts.

	11-11-2003 16:18									#16
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Enjoy Hull...some of us are having to spend more time in Grimsby. It makes you appreciate the place

	11-11-2003 16:27									#17
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kaak@kaak.net>I commaaand youu to obeyyy they woord of the Lord, which tells you to CHANGE DIRECTORY!

There are soem more basic commands, so what do you need?

	11-11-2003 17:42									#18
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Well, it was inevitable, I decided to start testing these regexes...

$ cat databook
0:04:01:10:wh00t
0:10:12:05:l33t-2003
0:01:01:01:666
0:04:15:11:324
0:04:15:12:k3wl

$ sed -n '/^[^:]*:[^:]*:[^:]*:11/p' databook
0:04:15:11:324

This one prints November's records, as it's supposed to...

$ sed -n '/^[^:]*:[^:]*:[^:]*:\(11\)\|\(12\)/p' databook
0:10:12:05:l33t-2003
0:04:15:11:324
0:04:15:12:k3wl

I'l figure out why this one produces wrong results later, if I can be bothered... (it probably picks up the 12 in the third column for some reason)

$ sed -n '/^[^:]*:[^:]*:[^:]*:1[12]/p' databook
0:04:15:11:324
0:04:15:12:k3wl

This one does exactly what it's supposed to do.

$ sed -n '/^(.*?:){3}1[12]/p' databook

And this one doesn't seem to do anything... however, a fixed version of it does:

$ sed -n '/^\(.*:\)\{3\}1[12]/p' databook
0:04:15:11:324
0:04:15:12:k3wl

As does a version that might be safer, or then not, I'm not really sure:

$ sed -n '/^\([^:]*:\)\{3\}1[12]/p' databook
0:04:15:11:324
0:04:15:12:k3wl

No, I for one have not understood sed's rules about what needs to be escaped and what not in regexes...

	11-11-2003 20:20									#19
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You're all such a bunch of nerds...

	11-11-2003 20:41									#20
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I'm almost ashamed about the acts of l33tism I committed. I guess I've picked it up at the Gentoo forums where the user levels are in l33t, probably (hopefully) as a joke...

	11-11-2003 20:51									#21
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What is l33t?

	11-11-2003 21:13									#22
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Very, very sad Whaleboy, very, very sad. You've proven your credibility by not knowing what it is

	12-11-2003 08:32									#23
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He's just playing dumb Rich.

	12-11-2003 12:31									#24
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^\([^:]*:\)\{3\}1[12] would be safer than ^\(.*:\)\{3\}1[12], but something can be said for using unsafe REs as an input debugging tool; does sed not know about non-greedy matching?

I think I'll stick to Perl. Oh, yes.

SP

	12-11-2003 12:46									#25
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([3^4]*1:2(4)])$^¨b12

	12-11-2003 13:09									#26
	Remove this text

Sicko.

SP