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From: chet@cwns1.CWRU.EDU (Chet Ramey)
Newsgroups: comp.unix.wizards
Subject: Re: nested loops
Message-ID: <1990Aug10.192841.23503@usenet.ins.cwru.edu>
Date: 10 Aug 90 19:28:41 GMT
References: <4103@herbie.misemi>
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Organization: Case Western Reserve Univ. Cleveland, Ohio, (USA)
Lines: 32

In article <4103@herbie.misemi> adley@herbie.misemi ( iccad) writes:

$ !# /bin/sh
$ this="one two three"
$ that="four five six seven"
$ them="eight nine ten"
$ all="this that them"
$ #
$ for i in $all
$ do
$ for j in $`echo $i`
$ do
$ echo $i $j
$ done
$ done

$ The problem lies in the  $`echo $i` statment
$ the `echo $i` preforms as expected and the result is one of this,
$ that, or them
$ the $ infront of this statment however is taken as a literal $
$ and does not return the value of the variable this or that or them
$ instead it returns $this or $that or $them.

Use `eval'.

Chet
-- 
Chet Ramey				``Levi Stubbs' tears run down
Network Services Group			  his face...''
Case Western Reserve University	
chet@ins.CWRU.Edu