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From: gwyn@brl-tgr.ARPA (Doug Gwyn <gwyn>)
Newsgroups: net.unix
Subject: Re: It is said that there is no such thing as a stupid question - let's see:
Message-ID: <1997@brl-tgr.ARPA>
Date: Sat, 25-Jan-86 23:53:51 EST
Article-I.D.: brl-tgr.1997
Posted: Sat Jan 25 23:53:51 1986
Date-Received: Wed, 29-Jan-86 04:15:30 EST
References: <508@ssc-vax.UUCP>
Distribution: net
Organization: Ballistic Research Lab
Lines: 22

> Is there a way to dimension buffers (arrays) in scripts,  and selectivly extract
> portions/fields of data from them?  I would like to also be able to do this with
> buffers in the B and C shells.
> 
> Example:
> 
>   LONG_THANKS="Thanksinadvanceforallyourhelp"
>  
> I want to take columns 1-5, add a space, and add columns 22-24. and set them into
> the buffer SHORT_THANKS.

You can't readily do this without the aid of string-handling
utilities; I seem to recall some substring utilities posted
to the net within the past year.  (The Korn shell has some
additional facilities built in that would help.)

The System V utility "cut" can be used to extract fields from
strings, e.g.

SHORT_THANKS=`echo "$LONG_THANKS" | cut -c1-5`\ `echo "$LONG_THANKS" | cut -c22-24`

This isn't ideal, but it may serve your needs (strange as they are).