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Top Forums Shell Programming and Scripting BASH: Break line, read, break again, read again... Post 302520219 by SilversleevesX on Friday 6th of May 2011 06:56:44 AM
Old 05-06-2011
It might, but I went another way...

You might say I kind'a bailed. I decided since I was formatting the data to work with the older (and in Cygwin, slower) script, whether or not the lines had one delimiter or two didn't matter so much as getting the processing time down with the built-ins.

So I tried a similar string to the example I gave in my OP, removed one 'while IFS="" ' inside another while/do/done loop (with which I'd been trying to break up the $tags variable), and on the single delimiter -- this time a comma, though it could have just as easily been a colon or a carat (^) -- it ran as fast in Cygwin as the other one has always done in GNOME Terminal, give or take a few dozen ticks.

Which is OK with me. Smilie

The command string you suggested won't go to waste, though. I've found another old script that is also written to read text data delimited by two different bits of punctuation. I've got a slightly-faster version worked up now, but I think it could be made even zippier. I'll C&P your line and see if I can use it with this other script.

Thanks for the quick reply.

BZT
 

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Regexp::Common::delimited(3)				User Contributed Perl Documentation			      Regexp::Common::delimited(3)

NAME
Regexp::Common::delimited -- provides a regex for delimited strings SYNOPSIS
use Regexp::Common qw /delimited/; while (<>) { /$RE{delimited}{-delim=>'"'}/ and print 'a " delimited string'; /$RE{delimited}{-delim=>'/'}/ and print 'a / delimited string'; } DESCRIPTION
Please consult the manual of Regexp::Common for a general description of the works of this interface. Do not use this module directly, but load it via Regexp::Common. $RE{delimited}{-delim}{-esc} Returns a pattern that matches a single-character-delimited substring, with optional internal escaping of the delimiter. When "-delim=S" is specified, each character in the sequence S is a possible delimiter. There is no default delimiter, so this flag must always be specified. If "-esc=S" is specified, each character in the sequence S is the delimiter for the corresponding character in the "-delim=S" list. The default escape is backslash. For example: $RE{delimited}{-delim=>'"'} # match "a " delimited string" $RE{delimited}{-delim=>'"'}{-esc=>'"'} # match "a "" delimited string" $RE{delimited}{-delim=>'/'} # match /a / delimited string/ $RE{delimited}{-delim=>q{'"}} # match "string" or 'string' Under "-keep" (See Regexp::Common): $1 captures the entire match $2 captures the opening delimiter (provided only one delimiter was specified) $3 captures delimited portion of the string (provided only one delimiter was specified) $4 captures the closing delimiter (provided only one delimiter was specified) $RE{quoted}{-esc} A synonym for $RE{delimited}{q{-delim='"`}{...}} SEE ALSO
Regexp::Common for a general description of how to use this interface. AUTHOR
Damian Conway (damian@conway.org) MAINTAINANCE
This package is maintained by Abigail (regexp-common@abigail.be). BUGS AND IRRITATIONS
Bound to be plenty. For a start, there are many common regexes missing. Send them in to regexp-common@abigail.be. LICENSE and COPYRIGHT This software is Copyright (c) 2001 - 2009, Damian Conway and Abigail. This module is free software, and maybe used under any of the following licenses: 1) The Perl Artistic License. See the file COPYRIGHT.AL. 2) The Perl Artistic License 2.0. See the file COPYRIGHT.AL2. 3) The BSD Licence. See the file COPYRIGHT.BSD. 4) The MIT Licence. See the file COPYRIGHT.MIT. perl v5.18.2 2013-03-08 Regexp::Common::delimited(3)
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