RE: [FWP] joining columns in csv files

["Larry Rosler" <lr@hpl.hp.com>]

> From: yanick1@sympatico.ca [mailto:yanick1@sympatico.ca]
> Sent: Wednesday, November 15, 2000 16:36
> To: fwp@technofile.org
> Subject: Re: [FWP] joining columns in csv files
>
> On Wed, Nov 15, 2000 at 03:15:12PM -0600, David Henderson wrote:
> > On Wed, Nov 15, 2000 at 07:24:00PM +0000, fergal daly wrote:
> > > perl -pe '$i=1;s/,/$i++=~m#^4|5|6$#?"":","/ge'
> >                            ^^^^^^^^^^
> > I'm sure you meant:
> >
> > > perl -pe '$i=1;s/,/$i++=~m#^(4|5|6)$#?"":","/ge'
> >
> > Otherwise, 43 (/^4/), 157 (/5/), or 26 (/6$/) would also match.

The use of # as the interior regex delimiter isn't good because of the $#
sequence.

  perl -pe 's/,/++$i!~m%^[456]$%&&$&/ge'

> In this case:
>
> perl -pe's/,/$&if++$i,!grep$i==$_,4,5,6/eg'
>
> get a lower golf score and is correct (as far as I know). Yay! :)

  perl -pe's/,/3<++$i&&$i<7?"":$&/eg'

> Joy,
> Yanick

More joy,

--
Larry Rosler
Hewlett-Packard Laboratories
http://www.hpl.hp.com/personal/Larry_Rosler/
Larry_Rosler@pobox.com


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