need help with sed

[Guillaume]

Hi,

When I run this command:
     echo  2008:04:23 | sed 's/://'
The result is
     200804:23

I expect to have this :
     20080423

What is wrong with my very simple regexp  ':' why all occurence of the
char ':' are not deleted ?

its make me crazy, can someone help me ?

Thanks
-- 
Guillaume

[Guillaume]

Thanks guys, its works !


2008/6/30 Dave Cook <D.Cook(a)sheffield.ac.uk&gt;:
>  Hello Guillame,
>
>  add a 'g' to the end of the sed command. 'g' means global i.e. EVERY
>  occurence of : on the line is replaced.
>
>  Dr. D B Cook
>  Dept. of Chemistry
>  The University of Sheffield
>
>
>  --
>  fedora-list mailing list
>  fedora-list(a)redhat.com
>  To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
>  


-- 
Guillaume

[John Cornelius]

Guillaume wrote:
>  Hi,
>
>  When I run this command:
>       echo  2008:04:23 | sed 's/://'
>  The result is
>       200804:23
>
>  I expect to have this :
>       20080423
>
>  What is wrong with my very simple regexp  ':' why all occurence of the
>  char ':' are not deleted ?
>
>  its make me crazy, can someone help me ?
>
>  Thanks 
How about
    echo 2008:04:23 | sed 's/://g'

The 'g' causes all instances of the ':' character on the line to be 
replaced. Normally it just replaces the first instance of a character on 
the line.

John Cornelius

[wwp]

Hello Luc,


On Mon, 30 Jun 2008 18:33:42 +0200 Luc MAIGNAN <luc.maignan(a)winxpert.com&gt; wrote:

>  Hello,
>  
>  it is a normal feature because your regex works on only one caracter ':' and not
> all. You should use 'g' as 'global' modifyer to do what you want : 
Luc, if you replied to my email (instead of a previous on in the
thread), this means that you ignored the 3 other replies in that thread
that brought the solution to the OP. More over, replying to my email
does nothing but confusing the topic, since I introduced another idea.
Please read the thread before replying blindly!


Regards,

>  echo 2008:04:23 | sed 's/://g'
>  
>  Regards
>  
>  wwp a écrit :
>  > Hello Guillaume,
>  >
>  >
>  > On Mon, 30 Jun 2008 13:58:29 +0200 Guillaume <guillaume.chardin(a)gmail.com&gt;
> wrote:
>  >
>  >   >> Hi,
>  >>
>  >> When I run this command:
>  >>      echo  2008:04:23 | sed 's/://'
>  >> The result is
>  >>      200804:23
>  >>
>  >> I expect to have this :
>  >>      20080423
>  >>
>  >> What is wrong with my very simple regexp  ':' why all occurence of the
>  >> char ':' are not deleted ?
>  >>
>  >> its make me crazy, can someone help me ?
>  >>
>  >> Thanks
>  >>     >
>  > For this exact same purpose - removing all occurrences of some specific
>  > char(s) - you could have used `tr`, like in:
>  >
>  > # echo 2008:04:23 | tr -d :
>  >
>  >
>  > Regards,
>  >
>  >   -- fedora-list mailing list
>  fedora-list(a)redhat.com
>  To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list 
-- 
wwp

[wwp]

Hello Guillaume,


On Mon, 30 Jun 2008 13:58:29 +0200 Guillaume <guillaume.chardin(a)gmail.com&gt; wrote:

>  Hi,
>  
>  When I run this command:
>       echo  2008:04:23 | sed 's/://'
>  The result is
>       200804:23
>  
>  I expect to have this :
>       20080423
>  
>  What is wrong with my very simple regexp  ':' why all occurence of the
>  char ':' are not deleted ?
>  
>  its make me crazy, can someone help me ?
>  
>  Thanks 
For this exact same purpose - removing all occurrences of some specific
char(s) - you could have used `tr`, like in:

# echo 2008:04:23 | tr -d :


Regards,

-- 
wwp

[Luc MAIGNAN]

Hello,

it is a normal feature because your regex works on only one caracter ':' 
and not all. You should use 'g' as 'global' modifyer to do what you want
:


echo 2008:04:23 | sed 's/://g'

Regards

wwp a écrit :
>  Hello Guillaume,
>
>
>  On Mon, 30 Jun 2008 13:58:29 +0200 Guillaume <guillaume.chardin(a)gmail.com&gt; wrote:
>
>    
> > Hi,
> >
> > When I run this command:
> >      echo  2008:04:23 | sed 's/://'
> > The result is
> >      200804:23
> >
> > I expect to have this :
> >      20080423
> >
> > What is wrong with my very simple regexp  ':' why all occurence of the
> > char ':' are not deleted ?
> >
> > its make me crazy, can someone help me ?
> >
> > Thanks
> >     
>
>  For this exact same purpose - removing all occurrences of some specific
>  char(s) - you could have used `tr`, like in:
>
>  # echo 2008:04:23 | tr -d :
>
>
>  Regards,
>
>

[laurence orchard]

Guillaume wrote:
>  Hi,
>  
>  When I run this command:
>       echo  2008:04:23 | sed 's/://'
>  The result is
>       200804:23
>  
>  I expect to have this :
>       20080423
>  
>  What is wrong with my very simple regexp  ':' why all occurence of the
>  char ':' are not deleted ?
>  
>  its make me crazy, can someone help me ?
>  
>  Thanks 
try sed 's/://g'

Hi
	Try this
echo  2008:04:23 | sed 's/://g'

Regards
Ovia

-----Original Message-----
From: fedora-list-bounces(a)redhat.com
[mailto:[e-mail]] On Behalf Of Guillaume
Sent: Monday, June 30, 2008 5:28 PM
To: For users of Fedora
Subject: need help with sed

Hi,

When I run this command:
     echo  2008:04:23 | sed 's/://'
The result is
     200804:23

I expect to have this :
     20080423

What is wrong with my very simple regexp  ':' why all occurence of the
char ':' are not deleted ?

its make me crazy, can someone help me ?

Thanks
-- 
Guillaume

-- 
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fedora-list(a)redhat.com
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[Dave Cook]

Hello Guillame,

add a 'g' to the end of the sed command. 'g' means global i.e. EVERY 
occurence of : on the line is replaced.

Dr. D B Cook
Dept. of Chemistry
The University of Sheffield