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Regex broken??

why do we use systemd?

Re: Question for Fedora users of...

Stephen Davies

Tuesday, 8 July 2014 Tue, 8 Jul '14

10:47 p.m.

I have just noticed that regex seems to be broken in my Fedora 20 (just updated to latest). Any regex search in vi, gawk, grep -E etc fails. Any ideas? Cheers, Stephen Davies --

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Heinz Diehl

Thursday, 10 July Thu, 10 Jul

7:31 a.m.

On 09.07.2014, Stephen Davies wrote:

2. I hadn't noticed that all lines started with a space.

Way back in 19-something (guess it was 1993) when I poked around with Powerbasic, I remember there was a function called trim(), which removed the whitespace on both ends of a string :-)

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Suvayu Ali

Wednesday, 9 July Wed, 9 Jul

4:39 a.m.

On Wed, Jul 09, 2014 at 02:16:21PM +0930, Stephen Davies wrote:

Mea culpa :-( Twice over in fact. 1. I hadn't noticed that the files in question were all DOS files sent to me by a windows user ( so trailing $ searches failed) and 2. I hadn't noticed that all lines started with a space. Elderly blindness. Sorry.

A weakly related note about regexes; if your regex uses ranges, or character classes, your results may vary depending on your current locale! -- Suvayu Open source is the future. It sets us free.

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Stephen Davies

Tuesday, 8 July Tue, 8 Jul

11:46 p.m.

Mea culpa :-( Twice over in fact. 1. I hadn't noticed that the files in question were all DOS files sent to me by a windows user ( so trailing $ searches failed) and 2. I hadn't noticed that all lines started with a space. Elderly blindness. Sorry. Cheers, Stephen On 09/07/14 14:08, Ed Greshko wrote:

On 07/09/14 12:21, Stephen Davies wrote: > On 09/07/14 13:47, Joe Zeff wrote: >> On 07/08/2014 08:47 PM, Stephen Davies wrote: >>> Any ideas? >> >> Any details? > For example, > > /^xx > > or > > :g/^xx/s/xx/yy/ > > in vi finds nothing in a file with many lines starting with xx. > > Similarly grep -E "^xx" and gawk '/^xx/{print}'. > > In all cases, omitting the ^ finds the relevant lines (plus a whole lot more). > > Difference: one with and one without regex. > [egreshko@meimei ~]$ cat stuff This is a file with xx stuff in it. This doesn't start with xx xx but this does x and this does not [egreshko@meimei ~]$ grep -E "^xx" stuff xx but this does Fully updated this AM.

-- ============================================================================= Stephen Davies Consulting P/L Phone: 08-8177 1595 Adelaide, South Australia. Mobile:040 304 0583 Records & Collections Management.

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Ed Greshko

11:38 p.m.

On 07/09/14 12:21, Stephen Davies wrote:

On 09/07/14 13:47, Joe Zeff wrote: > On 07/08/2014 08:47 PM, Stephen Davies wrote: >> Any ideas? > > Any details? For example, /^xx or :g/^xx/s/xx/yy/ in vi finds nothing in a file with many lines starting with xx. Similarly grep -E "^xx" and gawk '/^xx/{print}'. In all cases, omitting the ^ finds the relevant lines (plus a whole lot more). Difference: one with and one without regex.

[egreshko@meimei ~]$ cat stuff This is a file with xx stuff in it. This doesn't start with xx xx but this does x and this does not [egreshko@meimei ~]$ grep -E "^xx" stuff xx but this does Fully updated this AM. -- If you can't laugh at yourself, others will gladly oblige.

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Stephen Davies

11:21 p.m.

On 09/07/14 13:47, Joe Zeff wrote:

On 07/08/2014 08:47 PM, Stephen Davies wrote: > Any ideas? Any details?

For example, /^xx or :g/^xx/s/xx/yy/ in vi finds nothing in a file with many lines starting with xx. Similarly grep -E "^xx" and gawk '/^xx/{print}'. In all cases, omitting the ^ finds the relevant lines (plus a whole lot more). Difference: one with and one without regex. HTH, Stephen -- ============================================================================= Stephen Davies Consulting P/L Phone: 08-8177 1595 Adelaide, South Australia. Mobile:040 304 0583 Records & Collections Management.

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Joe Zeff

11:17 p.m.

On 07/08/2014 08:47 PM, Stephen Davies wrote:

Any ideas?

Any details?

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participants (5)

Ed Greshko
Heinz Diehl
Joe Zeff
Stephen Davies
Suvayu Ali