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From: lewis@tramp.Colorado.EDU (LEWIS WILLIAM M JR)
Subject: Re: need AWK help: lowercase, trim trailing spaces
Message-ID: <1991Apr20.220114.8727@colorado.edu>
Keywords: awk
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Organization: University of Colorado, Boulder
References: <1817@wjvax.UUCP> <1991Apr20.075507.17530@midway.uchicago.edu>
Date: Sat, 20 Apr 1991 22:01:14 GMT
Lines: 8

To prevent printing blank lines, simply do (in awk):

	address = substr(...   )
	if (length(adress) > 0)
		print address
	etc., etc.

The upper/lower case problem is more difficult