Re: OffTopic : sed : Alternate (2,4,6..) replacement

It will replace colons with blank and display "$A:that Junk" on even number of iterations.
which is used to evaluate the if condition. On 12/16/2003 11:04:31 AM, Stephen.Lee_at_DTAG.Com wrote:
>
> Will this work?
>
> ------------------------------------------------------
> #!/usr/bin/ksh
> THINGY=0
> cat swt | sed 's/:/ /' | while read A B JUNK; do
>
> if [ $THINGY -eq 1 ]; then
> B="that"
> THINGY=0
> else
> THINGY=1
> fi
> echo "$A:$B $JUNK"
>
> done
> ------------------------------------------------------
>
> You can set up a similar loop in awk too.
> The sed 's/:/ /' changes the colon to a space so that the read A B JUNK will
> work.
>
> > -----Original Message-----
> >
> > Hi List
> > I need some help on this;
> > How do i replace the 2nd,4th,6th occurances of a column
> > (vertical) in a
> > file.
> > I know sed does it within a row
> >
> > $ cat swt
> > 01:this is a file1 this
> > 02:this is a file1 this
> > 03:this is line3
> > 04:this is line4
> >
> > $ sed 's/this/that/2' swt
> > 01:this is a file1 that
> > 02:this is a file1 that
> > 03:this is line3
> > 04:this is line4
> > $ sed 's/this/that/1' swt
> > 01:that is a file1 this
> > 02:that is a file1 this
> > 03:that is line3
> > 04:that is line4
> >
> > But i want
> > 01:this is a file1 this
> > 02:that is a file1 this
> > 03:this is line3
> > 04:that is line4
> >
> > I tried awk but awk seems to be going one line at a time.
> >
> > Thanks in Advance.
> >
> > GovindanK
> >
> > --
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> > Author: GovindanK
> > INET: gkatteri_at_fastmail.fm
> >
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> --
> Author: <Stephen.Lee_at_DTAG.Com
> INET: Stephen.Lee_at_DTAG.Com
>
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> San Diego, California -- Mailing list and web hosting services
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Mladen Gogala
Oracle DBA

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Mladen Gogala
  INET: mladen_at_wangtrading.com

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