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From: daniels@well.UUCP
Newsgroups: comp.unix.questions
Subject: Thanks for the awk help!
Message-ID: <3992@well.UUCP>
Date: Sun, 20-Sep-87 21:25:02 EDT
Article-I.D.: well.3992
Posted: Sun Sep 20 21:25:02 1987
Date-Received: Tue, 22-Sep-87 01:20:34 EDT
Reply-To: daniels@well.UUCP (Dan Smith, Social Mammal...)
Distribution: na
Organization: Whole Earth 'Lectronic Link, Sausalito, CA
Lines: 39


	Thanks to all who sent me suggestions concerning awk. It appears
that the documentation is, uh, how shall we say... less than perfect.
After 4 1/2 years of Unix, I should remember to take unix docs with a
grain of rock salt :-)

	The solution to my problem seems to be that of having a shell script
doing some pre-processing.

	A new question!

	I'm coming up with fast ways of determining all of the file name
extensions in a directory. (this is in a csh script)  The problem is,
csh doesn't have a fast way of telling you that an element in a variable
is just a basename (let's say $a was set from "set a=*", and you are looking
for basename only files such as "Makefile", or "readme"). It would be
good for csh to have a :b modifier... you could say "echo $a:gb" to get
basename only files. The fastest way so far that I've come up with is:

	set bnames=""
	set tmp=$a
	while ($#tmp)
		if ($tmp[1]:r == $tmp[1]) then
			set bnames=($bnames $tmp[1])
		endif
		shift tmp
	end

	I'm trying to avoid going into a loop, since most of the stuff I deal
with might have directories with 20-200 files, and only 2 or 3 of those
files are basename only. Sure this works, but I'm looking for more speed
(I'll eventually rewrite a lot of this in C, but I'm quickly protyping some
ideas in csh) Any ideas?

				dan smith

dan smith, island graphics, marin co., ca  | "I am responsible for everything
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