Gentoo Archives: gentoo-user

From:	Willie Wong <wwong@×××××××××.EDU>
To:	gentoo-user@l.g.o
Subject:	Re: [gentoo-user] About sed
Date:	Mon, 07 Nov 2005 07:00:10
Message-Id:	`20051107065509.GA30529@princeton.edu`
In Reply to:	Re: [gentoo-user] About sed by gentuxx

1	On Sun, Nov 06, 2005 at 09:03:01PM -0800, gentuxx wrote:
2	> sed -n '/^CLOCK=/s/^$CLOCK="."$.$/\1/p /etc/conf.d/clock
3	>
4
5	Ah, yes, I misunderstood the OP. I thought he didn't want the lines
6	with trailing comments at all.
7
8	But is it necessary to give the address for an s// replacement? As I
9	understand it that sed is a stream editor and will try the replacement
10	on every "line" it encounters. The -n flag would guarantee only the
11	line changed would be printed anyway.
12
13	I guess what I am saying is that
14	sed -n 's/^$CLOCK="."$.$/\1/p' /etc/conf.d/clock
15	would do just as fine, no?
16
17	W
18	--
19	The particle physicists use order parameter fields, too. Their
20	order parameter fields also hide lots of details about what their
21	quarks and gluons are composed of. The main difference is that
22	they don't know of what their fields are composed. It ought to
23	be reassuring to them that we don't always find our greater
24	knowledge very helpful.
25	~James P. Sethna "Order Parameters, Broken Symmetry, and Topology"
26	Sortir en Pantoufles: up 4 days, 8:10
27	--
28	gentoo-user@g.o mailing list

Subject	Author
Re: [gentoo-user] About sed	gentuxx <gentuxx@×××××.com>

1	On Sun, Nov 06, 2005 at 09:03:01PM -0800, gentuxx wrote:
2	> sed -n '/^CLOCK=/s/^\(CLOCK="."\).$/\1/p /etc/conf.d/clock
3	>
4
5	Ah, yes, I misunderstood the OP. I thought he didn't want the lines
6	with trailing comments at all.
7
8	But is it necessary to give the address for an s// replacement? As I
9	understand it that sed is a stream editor and will try the replacement
10	on every "line" it encounters. The -n flag would guarantee only the
11	line changed would be printed anyway.
12
13	I guess what I am saying is that
14	sed -n 's/^\(CLOCK="."\).$/\1/p' /etc/conf.d/clock
15	would do just as fine, no?
16
17	W
18	--
19	The particle physicists use order parameter fields, too. Their
20	order parameter fields also hide lots of details about what their
21	quarks and gluons are composed of. The main difference is that
22	they don't know of what their fields are composed. It ought to
23	be reassuring to them that we don't always find our greater
24	knowledge very helpful.
25	~James P. Sethna "Order Parameters, Broken Symmetry, and Topology"
26	Sortir en Pantoufles: up 4 days, 8:10
27	--
28	gentoo-user@g.o mailing list