From: Neil Jerram <neil@ossau.uklinux.net>
To: William James <w_a_x_man@yahoo.com>
Cc: guile-user@gnu.org
Subject: Re: regex-split for Guile
Date: Sat, 12 Mar 2011 02:08:12 +0000 [thread overview]
Message-ID: <87ei6dt7jn.fsf@ossau.uklinux.net> (raw)
In-Reply-To: <135915.35634.qm@web112617.mail.gq1.yahoo.com> (William James's message of "Mon, 7 Mar 2011 06:57:00 -0800 (PST)")
William James <w_a_x_man@yahoo.com> writes:
> (define (regex-split regexp str . options)
Thanks for posting that! For fun/interest, here's an alternative
implementation that occurred to me.
Neil
(use-modules (ice-9 regex)
(ice-9 string-fun))
(define (regex-split regex str . opts)
(let* ((unique-char #\@)
(unique-char-string (string unique-char)))
(let ((splits (separate-fields-discarding-char
unique-char
(regexp-substitute/global #f
regex
str
'pre
unique-char-string
0
unique-char-string
'post)
list)))
(cond ((memq 'keep opts)
splits)
(else
(let ((non-matches (map (lambda (i)
(list-ref splits (* i 2)))
(iota (floor (/ (1+ (length splits)) 2))))))
(if (memq 'trim opts)
(filter (lambda (s)
(not (zero? (string-length s))))
non-matches)
non-matches)))))))
next prev parent reply other threads:[~2011-03-12 2:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-07 14:57 regex-split for Guile William James
2011-03-12 2:08 ` Neil Jerram [this message]
-- strict thread matches above, loose matches on Subject: below --
2011-03-14 14:54 William James
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