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Date:	Sun, 21 Mar 1999 19:08:20 PST
From:	"Gregory W. Smith" <gsmith@well.com >
Reply-To:	scoug-programming@scoug.com
To:	< "scoug-programming@scoug.com" > scoug-programming@scoug.com >
Subject:	SCOUG-Programming: Rollin's Rexx

Content Type: text/plain

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On Sun, 21 Mar 1999 14:57:24 PST, Peter Skye wrote:
>Rollin,
>
>At yesterday's Programming SIG you were demonstrating a REXX routine to
>parse a Hobbes directory listing, and you used a PARSE syntax I wasn't
>aware of.
>
>I figured I'd just missed it in the online documentation. Silly me.
>
>I can't find what I thought I saw on your screen. You had something
>like:
>
> parse var str x':'y':'z

Documentation on templates is a bit sparse in the online documents. I
usually do the fancier templates to take apart something after I have
used a plain vanilla PARSE instruction, For example, when processing
log files....

do while lines(inputfile)>0
logline = linein(inputfile)
parse value logline with logdate logtime logentry
...
parse var logdate with yr '/' mm '/' dy
parse var logtime with hr ':' min ':' sec
...
end /* do */

The entries in the logfile are date and time stamped. The first pase
instruction breaks between the spaces to separate the logdate, from the
logtime, and the rest of the line. So the logdate has a date
"1999/03/20" and the logtime "19:12:45". The second parse instruction
separates the year, month, and day at the '/' characterrs in the
string. The third parse instruction separates the hour, minute, and
second at the ":" characters in the string.
===============================================================
Gregory W. Smith (WD9GAY) gsmith@well.com
finger gsmith@well.com for PGP public key
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