grep, etc

[Bob Stockler]

On Wed, Aug 18, 2004 at 11:56:55AM -0400, Mark Luljak wrote:
| On Wed, Aug 18, 2004 at 11:38:48AM -0400, Jay Ashworth may or may not have
| proven themselves an utter git by pronouncing:
| > On Wed, Aug 18, 2004 at 01:17:23AM -0400, Brian K. White wrote:
| > > Jay R. Ashworth wrote:
| > > > On Tue, Aug 17, 2004 at 11:08:11PM -0400, Brian K. White wrote:
| > > >> Fairlight wrote:
| > > >>> Sweet.  I should grab that.  :)  Basically a -useful- egrep.  :)
| > > >>> Well, egrep is useful, but not as useful as it otherwise could be.
| > > >> 
| > > >> I'd say the plain old stock sco grep was useful, since it aswered
| > > >> the need very directly in one command without especially exotic
| > > >> options or a pipeline. Didn't even require the stock egrep let alone
| > > >> gnu grep or pcregrep.
| > > > 
| > > > Well, except that it *didn't* fulfill the requirement of the poster
| > > > who started this thread, without a big ungainly pipline wrapped
| > > > around it. 
| > > 
| > > What are you talking about?
| > > 
| > > The stated request was:
| > > 
| > > sample data:
| > > ISA*00000089** *
| > > CLM*inv123456*a*b*c         -213
| > > SV1*23456*25*A*B            -214
| > > 
| > > I want to be able to view a range of lines, ie: from -213 to -216
| > > 
| > > In what way does this fail to meet that request?
| > > grep '-21[3-6]$' file
| > 
| > Well, in the *exact* instance he used as an example, it would work.
| > 
| > But what happens if he wants -213 through -226?
| > 
| > There isn't actually, quite enough information about his requirements
| > here to design a solution that's guaranteed to work.
| 
| Amen.  Which is why we ended up with anything from my pipeline (I was
| unaware you could combine funtionalities like you did, Jay) to accomplish a
| match and a range, to people just doing the range.  I think we all took a
| little something different away from it, depending how we read it.

If you're talking about your head - tail pipeline, it would
never have worked because you assumed the -213 and the -216
were line numbers, where they were really the final fields
in lines.

Bob

-- 
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