Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!decwrl!sun!pitstop!sundc!seismo!uunet!mcvax!ukc!icdoc!bilpin!jim
From: jim@bilpin.UUCP (Jim G)
Newsgroups: comp.unix.questions
Subject: Re: Strange behaviour of awk
Summary: String functions in awk
Keywords: awk
Message-ID: <1151@bilpin.UUCP>
Date: 6 Mar 89 13:13:35 GMT
References: <497@eutrc3.UUCP>
Organization: SRL, London, England
Lines: 28


    #{ v_unix.2 }
    IN 	ARTICLE <497@eutrc3.UUCP> , wsinkees@eutrc3.UUCP (Kees Huizing)
    WRITES :

    [ stuff deleted ]

>   Now I have two questions:
>   1. How can the value of $0 depend on whether it has been printed or not?
>      Is this a bug, or do I overlook some mechanism of awk?
>   2. Is there a direct way to get $2, $3, .... until the end of the line (record)
>      without the somewhat dirty change of $1?  This was my original problem.

    1. Our version of awk ( UNIX  System V Rel.2:01 ) works correctly here,
       but such assignments cause compression of white space ( multiple
       tabs/spaces between fields become single spaces ), so I would have to
       defer to {dph@lanl.gov (David Huelsbeck)}'s comments on that, as
       regards the specific problem on your system.
    2. A neat way to print from $? to end of line, as long as you are sure 
       that the value of $? will not appear as an earlier field in the line, 
       is : 	
		print substr( $0, index( $0, $? ) )
       ( see Aho/Weinberger/Kernighan's book 'The AWK Programming Language',
         p.42, for a summary of all the string functions )
-- 
			   <Jim G, Hatfield, England>
	   <Path: mcvax!ukc!icdoc!bilpin!jim> <UUCP: jim@bilpin.uucp>
  Programmers' maxim : If it's not aesthetically pleasing, it's probably wrong.