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From: jik@athena.mit.edu (Jonathan I. Kamens)
Newsgroups: comp.unix.questions
Subject: Re: Variables in csh
Message-ID: <1991May2.165922.10558@athena.mit.edu>
Date: 2 May 91 16:59:22 GMT
References: <9105020702.AA06707@csufres.CSUFresno.EDU>
Sender: news@athena.mit.edu (News system)
Organization: Massachusetts Institute of Technology
Lines: 46

In article <9105020702.AA06707@csufres.CSUFresno.EDU>, quang@CSUFRES.CSUFRESNO.EDU (Quang Ngo) writes:
|> 1) [how to take substrings in csh]

Csh has no facility for doing substrings.  You need to use something like awk
or expr.  Given your example:

|> Now, let's say I have
|> 
|> set a = "This is a string"
|>                
|> How do I print 'str' ?

You could do something like this:

echo "$a" | awk '{print substr($0, 11, 3)}'


|> 2) [How to keep spaces from being record separators in a data file read
|>     into a foreach loop using backquote substitution and "cat"]

Enclose the backquote substitution in double quotes.  For example, given your
data file:

|> John 234
|> Bill 123
|> Tom 231

And this script:

#!/bin/csh -f
foreach a ("`cat data`")
	echo $a
end

(which differs from yours only in the addition of backquotes), the following
output results:

John 234
Bill 123
Tom 231

-- 
Jonathan Kamens			              USnail:
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